Abrégé

A method to determine the velocity of static proppant settling in fracturing fluids. The proppant carrying capability of different friction reducer products can be compared, so the appropriate friction reducer product can be selected for hydraulic fracturing operations. The effect of friction reducer concentrations in the fracturing fluids, the salinity and hardness of the fracturing fluids, and the proppant size on the velocity of static proppant settling can be studied to optimize the chemical structures of the friction reducers in the process of synthesis and optimize the hydraulic fracturing operation, e.g. to determine the proper concentration of friction reducers according to the salinity and proppant size.

Classes IPC  ?

• G01N 15/04 - Recherche de la sédimentation des suspensions de particules
• C09K 8/80 - Compositions pour renforcer les fractures, p. ex. compositions pour agents de soutènement utilisés pour maintenir les fractures ouvertes

Abrégé

A composite logging device, which relates to the technical field of oil and gas logging equipment. The composite logging device comprises an array lateral logging assembly (100), a caliper pushing assembly (200) and an acoustic logging assembly (300), wherein the array lateral logging assembly (100) comprises a first sub (110), a framework (130), a circuit unit (140) and an electrode unit (120); the framework (130) and the circuit unit (140) are both arranged inside the first sub (110), with the framework (130) being connected to the first sub (110), and the circuit unit (140) being connected to the framework (130); the electrode unit (120) comprises a main current electrode, a first power supply electrode pair, a second power supply electrode pair, a third power supply electrode pair, a fourth power supply electrode pair and a fifth power supply electrode pair, with the fifth power supply electrode pair comprising fifth power supply electrodes; the caliper pushing assembly (200) comprises a second sub (210); the acoustic logging assembly (300) comprises a third sub (310); and two ends of the first sub (110) are respectively connected to the second sub (210) and the third sub (310), such that the second sub (210) and the third sub (310) serve as two fifth power supply electrodes of the array lateral logging assembly (100). Such a configuration enables the composite logging device to have a relatively small length and weight, and relatively low manufacturing costs.

Classes IPC  ?

• E21B 47/00 - Relevés dans les trous de forage ou dans les puits

Abrégé

A deviated well anisotropic formation three-dimensional induction logging data inversion method, comprising: carrying out azimuth angle conversion on pre-acquired three-dimensional induction logging data to generate a three-dimensional induction logging curve under a wellbore coordinate system (100); constructing a window function on the basis of morphological characteristics of the three-dimensional induction logging curve (200); segmenting the three-dimensional induction logging curve by means of the window function (300); and performing full-parameter inversion on each section of the three-dimensional induction logging curve to obtain a horizontal resistivity and vertical resistivity of each formation layer, formation boundaries and a well deviation angle, wherein an objective function of the full-parameter inversion is to minimize the ZZ component fitting error of the three-dimensional induction logging curve (400). The present application further relates to a deviated well anisotropic formation three-dimensional induction logging data inversion apparatus.

Classes IPC  ?

• G01V 1/48 - Traitement des données
• G01V 1/50 - Analyse des données

Abrégé

A method to determine the velocity of static proppant settling in fracturing fluids. The proppant carrying capability of different friction reducer products can be compared, so the appropriate friction reducer product can be selected for hydraulic fracturing operations. The effect of friction reducer concentrations in the fracturing fluids, the salinity and hardness of the fracturing fluids, and the proppant size on the velocity of static proppant settling can be studied to optimize the chemical structures of the friction reducers in the process of synthesis and optimize the hydraulic fracturing operation, e.g. to determine the proper concentration of friction reducers according to the salinity and proppant size.

Classes IPC  ?

• G01N 15/04 - Recherche de la sédimentation des suspensions de particules
• C09K 8/80 - Compositions pour renforcer les fractures, p. ex. compositions pour agents de soutènement utilisés pour maintenir les fractures ouvertes

Abrégé

The present application provides a wellhole full-space time-domain electromagnetic detection method and apparatus. The corresponding wellhole full-space time-domain electromagnetic detection method comprises: transmitting a current pulse to a target stratum by means of at least one transmitting module to generate a primary field; receiving a plurality of secondary field attenuation signals by means of a plurality of receiving modules, wherein the secondary field attenuation signals are generated by the target stratum under the excitation of the primary field, and the distance between the transmitting module and each receiving module is a preset distance; and identifying the target stratum on the basis of the plurality of secondary field attenuation signals.

Classes IPC  ?

• G01V 3/28 - Prospection ou détection électrique ou magnétiqueMesure des caractéristiques du champ magnétique de la terre, p. ex. de la déclinaison ou de la déviation spécialement adaptée au carottage fonctionnant au moyen de champs magnétiques ou électriques produits ou modifiés par la formation terrestre environnante ou par les dispositifs de détection en utilisant des bobines d'induction

Abrégé

A while-drilling acoustic auto-tracking wellbore tool and a method for using same. The tool comprises: a power generation and communication system (100), which comprises a power generation system and a communication system, wherein the communication system is used for bidirectional transfer of measurement data and a control instruction; a power and measurement and control system (200), which comprises a measurement while drilling system, wherein the measurement while drilling system is used for measuring inclination and azimuth data of a newly drilled borehole, and transmitting the data to the communication system; and an acoustic measurement and guidance system (300), which comprises an acoustic emission and measurement and control system, wherein the acoustic emission and measurement and control system is used for emitting an acoustic signal in the newly drilled borehole, receiving a return signal and transmitting the return signal to the communication system. The solution solves the difficult problems of communicating a newly drilled well and an old borehole, determining the distance between a drill bit and the old borehole in real time, etc. The acoustic emission and measurement and control system emits the acoustic signal in the newly drilled borehole, receives the return signal and transmits the return signal to the communication system, and the position of a wellbore is dynamically scanned and monitored in an acoustic while-drilling manner, thereby achieving the aim of performing measurement while drilling.

Classes IPC  ?

• E21B 47/14 - Moyens pour la transmission de signaux de mesure ou signaux de commande du puits vers la surface, ou de la surface vers le puits, p. ex. pour la diagraphie pendant le forage utilisant des ondes acoustiques
• E21B 47/085 - Mesure du diamètre ou des dimensions correspondantes des trous de forage utilisant des moyens de radiation, p. ex. des moyens acoustiques, radioactifs ou électromagnétiques

Abrégé

A connectivity evaluation method and apparatus for a rock pore channel, and a server and a medium. The method comprises: acquiring mercury intrusion pressures and mercury intrusion volumes corresponding to the mercury intrusion pressures at at least two pressure change points for mercury entering a pore channel with a pore structure in rock to be evaluated; and on the basis of a first energy conservation formula, a second energy conservation formula, the mercury injection pressures and the mercury intrusion volumes, determining a connectivity coefficient of the pore channel, wherein the connectivity coefficient is used for evaluating the connectivity degree of the pore channel with the pore structure. Mercury intrusion pressures and mercury intrusion volumes are processed on the basis of the two energy conservation formulas, so as to enable the connectivity coefficient obtained on the basis of the processed mercury intrusion pressures and mercury intrusion volumes to be more accurate, thereby achieving more precise evaluation of the connectivity degree of pore channels in rock to be evaluated.

Classes IPC  ?

• G01N 15/08 - Recherche de la perméabilité, du volume des pores ou de l'aire superficielle des matériaux poreux

Abrégé

Co-cured blends of fluoroelastomers of tetrafluoroethylene-propylene copolymer with cure site monomer and a pentapolymer of vinylidene fluoride (VDF), hexafluoropropylene (HFP), tetrafluoroethylene (TFE), perfluorinated methyl vinyl ether (PMVE) and ethylene (PE) with peroxide as initiator and coagent TAIC as crosslinker show improved curing performance, improved mechanical properties and improved compression set as well. The co-cured fluoroelastomers show improved chemical resistance to the solvent aging systems and better retention of mechanical properties after aging at high temperature in the solvents system.

Classes IPC  ?

• C08F 214/26 - Tétrafluoro-éthylène
• C08F 214/28 - Hexafluoro-propène
• C08K 5/14 - Peroxydes
• C08K 5/3492 - Triazines

Abrégé

A method for recognizing a dominant carbonate rock reservoir in a complex facies zone, comprising: determining a lithologic type and lithologic physical properties of a study section (S100); carving out a development pattern configuration of a special geologic body in the lithologic type (S200); on the basis of the development pattern configuration, using an iterative modeling method to construct an inversion low-frequency model under a phase controlled constraint (S300); using the inversion low-frequency model to perform multi-parameter pre-stack inversion of the study section to obtain an inversion parameter data volume of the study section (S400); and using a multi-parameter intersection method to predict a dominant reservoir distribution in the inversion parameter data volume (S500). Also provided are an apparatus for recognizing a dominant carbonate rock reservoir in a complex facies zone, and an electronic device. By means of the phase controlled constraint, a configuration attribute representing geomorphic facies and lithologic inversion representing lithologic facies are comprehensively considered, and the attribute lateral resolution and the inversion longitudinal resolution are combined, thereby achieving high-precision recognition of a dominant carbonate rock reservoir in a complex facies zone.

Classes IPC  ?

• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements

Abrégé

The present invention provides a method for synthesizing dimethyl terephthalate, comprising: adding a sulfonic acid catalyst into methanol and terephthalic acid, performing a primary esterification reaction, then adding methanol, and performing a secondary esterification reaction; and crystallizing and distilling a secondary esterification product to obtain dimethyl terephthalate, wherein the catalyst comprises hexylbenzenesulfonic acid, dodecyl sulfonic acid, pentadecyl sulfonic acid or dodecylbenzene sulfonic acid. Compared with a concentrated sulfuric acid catalyst, the catalyst used in the present invention greatly weakens the corrosion of the catalyst to a device, and has good repeated use performance.

Classes IPC  ?

• C07C 67/08 - Préparation d'esters d'acides carboxyliques par réaction d'acides carboxyliques ou d'anhydrides symétriques avec le groupe hydroxyle ou O-métal de composés organiques
• C07C 69/82 - Esters d'acide téréphtalique
• B01J 31/02 - Catalyseurs contenant des hydrures, des complexes de coordination ou des composés organiques contenant des composés organiques ou des hydrures métalliques

Abrégé

Provided in the present disclosure are a filtering, coalescence, separation and oil removal system and a separation performance monitoring method therefor. A support body in a filter element support member is arranged at the upper end of a pipe body; a guide transition section in a coalescence filter element is detachably arranged at the upper end of a coalescence filtering section, the coalescence filtering section and the guide transition section are both sleeved outside of the support body, and a locking nut locks the support body and the guide transition section; and an air inlet connecting pipe and/or an air outlet connecting pipe are connected to an online separation performance monitoring system, and the monitoring system comprises a medium state equivalent converter, a flow meter and an online droplet particle concentration monitor. By means of the present disclosure, the technical problem of an increase in a pressure drop caused by a baffle arranged at an outlet of a filtering, coalescence and separation apparatus, or inconvenient operations and maintenance caused by a long distance between a filter element and a quick-opening blind flange port is solved; a separation performance test can be analyzed in a timely manner to provide data support for separation performance evaluation and performance optimization and improvement of a device; and the interference of the providing of a measurement channel on a medium flowing state is reduced by means of the medium state equivalent converter.

Classes IPC  ?

• B01D 50/00 - Combinaisons de procédés ou de dispositifs pour la séparation de particules de gaz ou de vapeurs
• B01D 46/00 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs
• C02F 1/40 - Dispositifs pour séparer ou enlever les substances grasses ou huileuses, ou les matières flottantes similaires
• C10L 3/10 - Post-traitement de gaz naturel ou de gaz naturel de synthèse

Abrégé

An apparatus and method for internal corrosion prevention is used for carbon capture utilization and storage injection well tubing. The method is directed to control flow in an injection well tubing and preventing internal corrosion of the injection well tubing. The method comprises steps of injecting CO2 stream into a hydrocarbon bearing reservoir from an injection well; and using a flap valve at a bottom end of an injection well tubing that operates by responding to elevated injection pressures; and automatically closing upon injection cessation, effectively preventing a flow-back of formulation fluids into the injection well tubing.

Classes IPC  ?

• E21B 34/10 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par un fluide de commande provenant de l'extérieur du trou de forage
• E21B 41/00 - Matériel ou accessoires non couverts par les groupes
• E21B 41/02 - Lutte contre la corrosion sur place dans les trous de forage ou dans les puits

Abrégé

An apparatus for internal corrosion prevention is used for carbon capture utilization and storage injection well tubing. The apparatus may comprise a flap valve at a bottom end of the injection well tubing that operates by responding to elevated injection pressures and automatically closes upon injection cessation, effectively preventing a flow-back of formulation fluids into the injection well tubing.

Classes IPC  ?

• B65G 5/00 - Emmagasinage des fluides dans des excavations ou cavités naturelles ou artificielles souterraines
• E21B 34/10 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par un fluide de commande provenant de l'extérieur du trou de forage
• E21B 43/16 - Procédés de récupération assistée pour l'extraction d'hydrocarbures

Abrégé

An absorbent for carbon dioxide capture, and a carbon dioxide capturing and absorbing method. The absorbent comprises, in percentages by mass, 40-70% of a main absorbent, 1-20% of an accelerator, 0.05-1% of a corrosion inhibitor, and 0.1-1% of an antioxidant, with the balance being water. The main absorbent comprises, in percentages by mass, 0-40% of a fatty amine, and 60-100% of an alcohol amine. The accelerator comprises at least one of a salt, a hindered amine and a sulfur-containing organic compound comprising S＝O, wherein the mass ratio of the salt to the hindered amine to the sulfur-containing organic compound is (0-2):(0-4):(0-6). The absorbent has a viscosity of less than or equal to 20 cp. The above formula improves the carbon dioxide capture and absorption capacity and regeneration effect of the absorbent, and can reduce energy for regeneration.

Classes IPC  ?

• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

The present invention is a hydraulic control apparatus that activates and deactivates a downhole tool, such as a reamer, at a desired downhole location in a borehole. The apparatus includes a piston, a housing, a coil spring, and a guide pin. The piston has a cam portion with a continuous slotted groove. There is a slide member and a force member within the slotted groove so that the piston moves longitudinally and rotationally within the housing according to the guide pin within the slotted groove. At the desired downhole location, drilling fluid pressure passes a pressure threshold to move a front outlet of the piston to an opened position past an end of the housing, while rotating the piston according to the slide member and force member in the slotted groove. The apparatus alternately extends and retracts the reamer by opening and closing the front outlet by hydraulic control.

Classes IPC  ?

• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage
• E21B 10/32 - Trépans avec une partie pilote, c.-à-d. trépans comportant un organe coupant piloteTrépans pour élargir le trou de forage, p. ex. alésoirs à organes coupants expansibles

Abrégé

An intelligent control method and apparatus for a quick-open pressure-bearing device system is provided. The method comprises an intelligent integrated control system receiving an opening/closing instruction of a pressure-bearing device system. Upon receipt of an opening instruction, the intelligent integrated control system scans and reads an internal state of a pressure-bearing device and the reading of a pressure transmitter, and determines whether an opening condition is satisfied. If yes, the system sequentially controls functional systems to be automatically opened. If not, the system controls corresponding valves to be automatically closed, automatically determines whether to enter a blowdown process, and performs corresponding automatic blowdown or pressure relief processing and an opening process again after completion. Upon receipt of a closing instruction, the intelligent integrated control system sequentially controls the functional systems to be automatically closed. After the closing is completed, the system completes the opening of the pressure-bearing device system.

Classes IPC  ?

• G05D 16/20 - Commande de la pression d'un fluide caractérisée par l'utilisation de moyens électriques
• G05B 13/02 - Systèmes de commande adaptatifs, c.-à-d. systèmes se réglant eux-mêmes automatiquement pour obtenir un rendement optimal suivant un critère prédéterminé électriques

Abrégé

The present application provides an adsorber, comprising a housing in which a cavity is formed, and a plurality of spaced adsorption bed layers and a plurality of gas flow uniform distribution plates which are located in the cavity, wherein the housing is further provided with a plurality of gas inlets and a gas outlet, the gas inlets are used for respectively injecting, into the cavity, gas to be adsorbed and regenerated gas, and the gas outlet is used for outputting adsorbed gas and desorbed gas; a gap between two adjacent adsorption bed layers forms a channel, the channel is separately communicated with the gas inlets and the gas outlet, and the width of the channel is gradually increased in the direction towards the gas inlets and is gradually reduced in the direction towards the gas outlet; the inlets of the plurality of gas flow uniform distribution plates are all communicated with the gas inlets, and the outlets of the gas flow uniform distribution plates face the adsorption bed layers; the aperture of the gas flow uniform distribution plates is gradually reduced from the inlets of the gas flow uniform distribution plates to the outlets of the gas flow uniform distribution plates. The present application is used for reducing bed pressure drop, and improving the adsorption and desorption efficiency.

Classes IPC  ?

• B01D 53/04 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p. ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes

Abrégé

A method for the time-depth conversion of a concealed structure in a foreland thrust belt with a low exploration degree. The method comprises: obtaining velocity variation characteristics of a study area; using seismically interpreted horizons and fault data in a time domain to establish a geological structure model; by means of a stratigraphically controlled and fault-block-division-based velocity assignment method, converting the geological structure model into an interval velocity model; establishing virtual well control points in the study area, and extracting from the interval velocity model an interval velocity curve at each virtual well control point (S400); converting the interval velocity curve at each virtual well control point into an average velocity curve (S500); using a stratigraphically controlled and fault-block-division-based virtual well control point spatial interpolation method to construct a three-dimensional average velocity volume; and performing time-depth conversion on target horizons. Further provided is an apparatus for the time-depth conversion of a concealed structure in a foreland thrust belt with a low exploration degree. By means of an obtained depth-domain structural map, the identification of a concealed structure in a foreland thrust belt with a low exploration degree can be realized, thereby providing reliable depth data for the detailed description of traps.

Classes IPC  ?

• G01V 1/30 - Analyse

Abrégé

A novel surfactant composition that comprises of two surfactant components, a solvent, and water. The surfactant composition is added to a fracturing fluid, which is then pumped downhole into a subterranean formation where the novel characteristics of the fracturing fluid lend to improved oil production over the fracturing fluid without the surfactant composition.

Classes IPC  ?

• C09K 8/68 - Compositions à base d'eau ou de solvants polaires contenant des composés organiques
• C09K 8/584 - Compositions pour les méthodes de récupération assistée pour l'extraction d'hydrocarbures, c.-à-d. pour améliorer la mobilité de l'huile, p. ex. fluides de déplacement caractérisées par l'utilisation de tensio-actifs spécifiques
• C09K 8/60 - Compositions pour activer la production en agissant sur la formation souterraine
• C09K 8/66 - Compositions à base d'eau ou de solvants polaires
• E21B 37/06 - Procédés ou appareils pour nettoyer les trous de forage ou les puits utilisant des moyens chimiques pour empêcher ou limiter le dépôt de paraffine ou de substances analogues
• E21B 41/02 - Lutte contre la corrosion sur place dans les trous de forage ou dans les puits
• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures

Abrégé

A method for depositing a thin film on a substrate and the use thereof, and a semiconductor device and the use thereof. The method is carried out in the cavity of an evaporation deposition chamber containing a crystal oscillator, and comprises the following steps: S1, determining a doping ratio of dopant materials in a thin film, wherein the dopant materials include at least one organic compound and/or polymer and at least one transition metal oxide; S2, determining an evaporation deposition condition for each dopant material, such that the ratio of stable evaporation rates of the dopant materials is the doping ratio of the dopant materials in the thin film; and S3, the dopant materials evaporating at the respective stable evaporation rates to deposit on a substrate. In the method, by means of simultaneously evaporating dopant materials in the cavity of an evaporation deposition chamber containing a crystal oscillator, a prepared doped thin film for a semiconductor device has an accurate doping ratio and greater electrical conductivity. Thus, a device prepared by means of applying the doped thin film in an organic electroluminescent device or a solar cell has a greater performance.

Classes IPC  ?

• C23C 14/24 - Évaporation sous vide

Abrégé

This disclosure discloses a velocity identification method and apparatus for interbed multiples, including: obtaining a velocity spectrum and propagation paths of interbed multiples in a stratum; collecting, from the velocity spectrum, velocities of a plurality of energy clusters, and obtaining propagation velocities and propagation duration of a plurality of primaries; calculating propagation velocities and propagation duration of an interbed multiples corresponding to each primary order by order, to obtain propagation velocities and propagation duration of low-order interbed multiples; and determining a horizon at which a low-order interbed multiples are generated and an order of the low-order interbed multiples; and identifying the interbed multiples based on the propagation velocities and the propagation duration of the low-order interbed multiples, the horizon at which the low-order interbed multiples are generated, and the order of the low-order interbed multiples, and in combination with the velocity spectrum.

Classes IPC  ?

• G01V 1/30 - Analyse
• G01V 1/34 - Représentation des enregistrements sismiques
• G01V 1/36 - Exécution de corrections statiques ou dynamiques sur des enregistrements, p. ex. correction de l'étalementÉtablissement d'une corrélation entre signaux sismiquesÉlimination des effets produits par un excès d'énergie

Abrégé

A dissolvable aluminum alloy can be used for components of a downhole tool. The dissolvable aluminum alloy can be dissolved completely and controlled at a dissolving rate so as to be compatible with downhole operations, including hydraulic fracturing operations. The alloy includes from about 0.01 wt % to about 1.5 wt % gallium; from about 0.01 wt % to about 1.5 wt % indium; from about 0.01 wt % to about 1.5 wt % bismuth; and the balance of substantial aluminum so as to be dissolvable in KCl at about 2.1% by weight and about 93° C. with a dissolving rate in a range of from about 10 to about 100 mg/cm2/hr, yield strength in a range of from about 25 to about 45 ksi, ultimate tensile strength in a range of from about 35 to about 60 ksi, and elongation in a range of from about 4 to about 15% at room temperature.

Classes IPC  ?

• C22C 21/00 - Alliages à base d'aluminium
• C09K 8/42 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits

Abrégé

A dissolvable aluminum alloy can be used for components of a downhole tool. The dissolvable aluminum alloy can be dissolved completely and controlled at a dissolving rate so as to be compatible with downhole operations, including hydraulic fracturing operations. The alloy includes from about 0.01 wt % to about 1.5 wt % gallium; from about 0.01 wt % to about 1.5 wt % indium; from about 0.01 wt % to about 1.5 wt % bismuth; and the balance of substantial aluminum so as to be dissolvable in KCI at about 2.1% by weight and about 93 gC with a dissolving rate in a range of from about 10 to about 100 mg/cm2/hr, yield strength in a range of from about 25 to about 45 ksi, ultimate tensile strength in a range of from about 35 to about 60 ksi, and elongation in a range of from about 4 to about 15% at room temperature.

Classes IPC  ?

• E21B 33/12 - PackersBouchons
• C22C 21/00 - Alliages à base d'aluminium
• C22F 1/04 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid de l'aluminium ou de ses alliages

Abrégé

The present invention provides a temperature and pressure responsive while-drilling plugging material, and a preparation method therefor and a use thereof. The temperature and pressure responsive while-drilling plugging material comprises the following raw materials in parts by weight: 60-80 parts of micron inert particles, 8-20 parts of a self-healing resin and 2-5 parts of a lubricant, wherein the self-healing resin is obtained by curing a resin monomer by means of a polyfunctional cyclic anhydride curing agent, and the polyfunctional cyclic anhydride curing agent is prepared by the reaction of polyhydroxy amine and cyclic anhydride. The plugging material has excellent plugging performance, has low filtration loss during secondary plugging, and is applicable to complex micro-fractured stratums.

Classes IPC  ?

• C09K 8/03 - Additifs spécifiques à usage général dans les compositions pour le forage des puits
• C09K 8/22 - Composés organiques synthétiques
• C09K 8/36 - Émulsions eau-dans-l'huile
• C09K 8/42 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits

Abrégé

A fracturing fluid for fracturing subterranean formations comprising ascorbic acid. The fracturing fluid can use ascorbic acid to delay increases in viscosity until desired. The viscosity increase can then be maintained over a period of time to perform fracturing operations.

Classes IPC  ?

• C09K 8/68 - Compositions à base d'eau ou de solvants polaires contenant des composés organiques
• C09K 8/70 - Compositions pour la formation de crevasses ou de fractures caractérisées par leur forme ou par la forme de leurs composants, p. ex. mousses
• C09K 8/80 - Compositions pour renforcer les fractures, p. ex. compositions pour agents de soutènement utilisés pour maintenir les fractures ouvertes
• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures
• E21B 43/267 - Maintien de fractures par étaiement
• E21B 43/27 - Procédés pour activer la production par formation de crevasses ou de fractures par emploi de produits chimiques érosifs, p. ex. d'acides

Abrégé

A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may comprise a diamond body. The diamond body comprises a first volume of diamond having a plurality of toughening agents dispersed in the diamond matrix constituted with diamond grains. The toughening agents have sizes ranging from about 100 nanometers to about 500 micrometers. The toughening agents have volume ratio of in the diamond body ranging from about 0.5% to about 40%. The toughening agents are at least one of tungsten, tantalum, molybdenum, niobium, iron, chromium, zirconium, titanium, platinum, iridium, hafnium, osmium, ruthenium, rhodium, vanadium, alloys, carbides/nitrides, metal oxides or ceramics containing thereof.

Classes IPC  ?

• B24D 3/02 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants
• C30B 29/04 - Diamant
• B01J 3/06 - Procédés utilisant des hyper-pressions, p. ex. pour la formation de diamantsAppareillage approprié, p. ex. moules ou matrices
• B24D 18/00 - Fabrication d'outils pour meuler, p. ex. roues, non prévue ailleurs

Abrégé

A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may comprise a diamond body. The diamond body comprises a first volume of diamond having a plurality of toughening agents dispersed in the diamond matrix constituted with diamond grains. The toughening agents have sizes ranging from about 100 nanometers to about 500 micrometers. The toughening agents have volume ratio of in the diamond body ranging from about 0.5% to about 40%. The toughening agents are at least one of tungsten, tantalum, molybdenum, niobium, iron, chromium, zirconium, titanium, platinum, iridium, hafnium, osmium, ruthenium, rhodium, vanadium, alloys, carbides/nitrides, metal oxides or ceramics containing thereof.

Classes IPC  ?

• B24D 3/06 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques métalliques
• B24D 18/00 - Fabrication d'outils pour meuler, p. ex. roues, non prévue ailleurs

Abrégé

Provided in the present invention are a high-strength low-molecular polymer gel system, a preparation method therefor and the use thereof. Raw materials of the polymer gel system comprise: 4-6% of a polymer emulsion, 0.4-0.8% of a phenolic cross-linking agent, 0-0.3% of a catalyst, 0.2-0.5% of an oxygen scavenger and 0.2-0.4% of a stabilizer, with the balance being water. The polymer emulsion is formed by copolymerizing an acrylamide monomer and a sodium p-styrenesulfonate monomer. The polymer gel plugging agent system disclosed by the present invention has good injectivity in the medium and deep portions of strata, and the polymer gel has high gel forming strength and large elasticity modulus after gelling and can improve the steam channeling plugging effect for heavy oil reservoirs.

Classes IPC  ?

• C09K 8/508 - Composés macromoléculaires

Abrégé

A drill pipe having multiple channels adaptively communicated with each other comprises a plurality of pipe bodies (1) connected end to end, wherein each pipe body comprises an inner pipe (11) and an outer pipe (12) sleeved outside the inner pipe, a first fluid channel (13) is formed in the middle of the inner pipe, and the inner pipe and the outer pipe are separated by means of two partition plates (14) to form a second fluid channel (15) and a third fluid channel (16); the pipe body further comprises a concentric joint (2), the concentric joint comprises joint bodies (21) arranged at two ends of the inner pipe, a first concentric channel (22) is formed between each joint body and the outer pipe, and a second concentric channel (23) is formed between each joint body and the inner pipe, the first concentric channel is configured to be communicated with the second fluid channel but not with the third fluid channel, and the second concentric channel is configured to be communicated with the third fluid channel but not with the second fluid channel. According to the drill pipe having multiple channels, the inner pipes and the outer pipes are separated to form a multi-channel structure, thereby reducing the space occupation of the drill pipe in the radial direction, avoiding impact on the use effect of the drill pipe.

Classes IPC  ?

• E21B 17/18 - Tubes comprenant plusieurs passages pour les fluides
• E21B 17/04 - AccouplementsJoints entre tige et trépan, ou entre tiges
• E21B 21/12 - Procédés ou appareils pour nettoyer les trous de forage par jet de fluide, p. ex. en utilisant l'air d'échappement du moteur utilisant des tubes de forage comprenant plusieurs passages pour les fluides, p. ex. systèmes en circuit fermé

Abrégé

An illumination analysis method based on a point spread function, comprising: obtaining an underground structure image on the basis of existing seismic observation data of an underground target area; extracting a point spread function in the underground structure image; parameterizing the point spread function, and extracting characteristic parameters of the point spread function; and establishing a quantitative relationship between the characteristic parameters of the point spread function and an imaging quality index of the underground structure image. The extracted characteristic parameters of the point spread function comprise spectrum, amplitude, morphological characteristics and the like. Further provided is an observation system optimization method, comprising: determining an observation system optimization solution on the basis of a quantitative relationship between characteristics parameters of a point spread function and an imaging quality index of an underground structure image. The methods improve the imaging effect of the underground structure image, and reduce the exploration risk and the data acquisition costs.

Classes IPC  ?

• G01V 1/30 - Analyse

Abrégé

A free surface multi-wave suppression method for ocean bottom node data, relating to the technical field of seismic exploration. The method comprises: performing interpolation of upgoing wave and downgoing wave ocean bottom node data (S110); separating multiple waves according to periodic characteristics of a wave field incident angle change (S120); and using a sparse inversion method to establish a target function, and, on the basis of the target function and by means of a fast iterative shrinkage threshold, solving for an upgoing wave field that does not contain multiple waves related to a free surface (S130), so as to remove multiple waves on the free surface. According to the method, multiple waves on a free surface in an upgoing wave field of ocean bottom node data of an ultra-shallow water area can be removed, and primary wave imaging quality of seismic data is improved. Further provided is a free surface multi-wave suppression apparatus for ocean bottom node data, a computer device, and a computer program product.

Classes IPC  ?

• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements
• G01V 1/30 - Analyse

Abrégé

The present invention belongs to the technical field of seismic data processing. Provided are a method and apparatus for adjusting energy during pre-stack data merging, and a device and a storage medium. The method comprises: on the basis of a seismic data shift of a plurality of survey regions, forming a first data volume before energy adjustment; performing gain adjustment on the first data volume, so as to obtain a second data volume; extracting sample points from the first data volume to obtain a first sample, and extracting sample points from the second data volume to obtain a second sample; extracting an envelope from the first sample and an envelope from the second sample; for each seismic trace, using, as an initial energy adjustment coefficient for the seismic trace, the ratio of the value corresponding to a first envelope surface of the seismic trace to the value corresponding to a second envelope surface of the seismic trace, and forming an initial energy adjustment coefficient volume on the basis of initial energy adjustment coefficients for all the seismic traces; and sequentially performing temporal and spatial smoothing on the initial energy adjustment coefficient volume, so as to form a target energy adjustment coefficient volume. The present invention maintains temporal energy characteristics while making spatial energy uniform and eliminating structural artifacts in a merged region.

Classes IPC  ?

• G01V 1/30 - Analyse
• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements

Abrégé

A terahertz-based non-metal pipeline defect detection method, system and device. The detection method comprises: acquiring a first terahertz detection signal of a non-metal pipeline to be subjected to detection (101); on the basis of the first terahertz detection signal, obtaining a first terahertz detection waveform (102); acquiring from a preset database a correspondence between defect types and terahertz detection waveforms, and on the basis of the first terahertz detection waveform and the correspondence, determining a target defect type corresponding to a defect in the pipeline, wherein each defect type corresponds to three detection waveforms (103); on the basis of the target defect type and the first terahertz detection signal, determining three-dimensional size data of the defect (104); and on the basis of the first terahertz detection signal and the three-dimensional size data, constructing a target three-dimensional structure of the defect (105). Therefore, a relatively perfect and developed terahertz detection method can be provided for a non-metal pipeline, thereby facilitating the promotion of a terahertz detection means in the field of non-metal pipeline detection.

Classes IPC  ?

• G01N 21/3586 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge en utilisant la lumière de l'infrarouge lointainCouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge en utilisant un rayonnement térahertz par spectroscopie térahertz dans le domaine temporel [THz-TDS]
• G01N 21/88 - Recherche de la présence de criques, de défauts ou de souillures

Abrégé

Disclosed are a perforator and perforation method based on cable-free connection. The perforator sequentially comprises, from top to bottom along the depth of a shaft, a data return portion (1), an electromagnetic deceleration portion (2), a detonation disconnecting portion and a perforating gun, wherein the data return portion is used for acquiring underground perforation operation data, and the data return portion at least comprises a power portion used for providing power for the perforator to return to the ground after a perforation operation; the electromagnetic deceleration portion is used for controlling a magnetic force of a casing for the perforator and adjusting the position of the perforator in a horizontal well section; the detonation disconnecting portion is used for performing detonation after the perforation operation is completed, so as to disconnect the detonation disconnecting portion from the perforating gun; and the perforating gun is used for launching internal perforating charge into a formation. The perforator and perforation method for performing perforation without using a cable can replace a conventional cable connection or coiled tubing conveyance type underground perforation well completion operation, and have the advantages of low operation cost and high well completion efficiency.

Classes IPC  ?

• E21B 43/116 - Perforateurs à balles ou à charge profilée

Abrégé

Provided in the present invention are a high-temperature-resistant filtrate reducer, a water-based drilling fluid and the use of the high-temperature-resistant filtrate reducer in drilling engineering in high-temperature subsurface environments. The filtrate reducer comprises carboxymethyl cellulose and a water-soluble polymer containing epoxy, and an open-loop coupling reaction of carboxyl and epoxy groups in high-temperature environments is utilized to induce in-situ self-crosslinking of carboxymethyl cellulose in high-temperature deep downhole environments, so that the filtrate loss reduction performance of the filtrate reducer at high temperatures is remarkably improved.

Classes IPC  ?

• C09K 8/487 - Additifs régulant les pertes de fluideAdditifs pour réduire ou empêcher la perte de circulation

Abrégé

A side storage type pipe string conveying device, comprising: a drill string feeding arm (1) provided with a conveying slide groove for conveying a pipe string; a conveying trolley (2) provided in the conveying slide groove and capable of pushing the pipe string to move in the length direction of the conveying slide groove; at least one storage module provided on the drill string feeding arm (1) and located on one side of the conveying slide groove, wherein the storage module comprises storage mechanisms (3), loading mechanisms (5), and kick-out mechanisms (6) which are provided on the drill string feeding arm (1), the storage mechanisms (3) are used for storing pipe strings, the loading mechanisms (5) can move the pipe strings stored in the storage mechanisms (3) into the conveying slide groove, and the kick-out mechanisms (6) can move the pipe strings in the conveying slide groove into the storage mechanisms (3). The side storage type pipe string conveying device can improve the conveying efficiency of a power catwalk.

Classes IPC  ?

• E21B 19/15 - Stockage des tiges en position horizontaleManipulation entre des positions horizontale et verticale

Abrégé

A cage-type dual wedge throttle valve, comprising: a housing having an inner cavity; a valve cover arranged at the top of the housing; a valve seat arranged in the inner cavity, wherein the valve seat comprises an outer valve seat and an inner valve seat, and a plurality of flow holes are distributed on the peripheral wall of the outer valve seat; a valve core, which comprises two wedge-shaped surfaces and two cylindrical surfaces which are axially symmetrically arranged about the central axis, wherein the cylindrical surfaces face the direction in which a fluid flows into the inner cavity, and the cylindrical surfaces can fit the inner wall of the inner valve seat; and a valve stem having the two ends respectively connected to a driving device and the valve core, wherein under the driving of the driving device, the valve stem can drive the valve core to reciprocate in the valve seat in the axial extension direction of the valve stem. By means of the above solution, primary throttling is achieved when a fluid passes through the outer valve seat, and secondary throttling is achieved as the valve core gradually extends into the inner valve seat; moreover, the valve core comprises wedge-shaped surfaces, and a long throttling stroke is formed, thereby improving the throttling switching performance of the throttle valve; the symmetrical arrangement of the two wedge-shaped surfaces can balance the pressure on the two sides, thereby improving the stability of the valve core under force.

Classes IPC  ?

• F16K 1/32 - Soupapes ou clapets, c.-à-d. dispositifs obturateurs dont l'élément de fermeture possède au moins une composante du mouvement d'ouverture ou de fermeture perpendiculaire à la surface d'obturation Détails
• F16K 1/38 - Corps de soupapes de forme conique
• F16K 25/00 - Détails constitutifs relatifs au contact entre corps de soupapes ou de clapets et leurs sièges
• F16K 47/02 - Moyens incorporés aux soupapes pour absorber l'énergie d'un fluide pour empêcher les coups de bélier ou le bruit
• E21B 34/02 - Aménagements des vannes pour les trous de forage ou pour les puits dans les têtes de puits
• E21B 34/06 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits

Abrégé

The present invention relates to the technical field of seismic exploration. Provided are a three-component seismic data vector anti-aliasing interpolation reconstruction method and an apparatus. The method comprises: representing three-component seismic data in a time domain as pure quaternions for vector joint; transforming the pure quaternion data in a time-space domain to a frequency-space domain to obtain frequency-space domain data; transforming the frequency-space domain data into a frequency-wave number domain; in the frequency-wave number domain, using an inclination angle scanning strategy to construct a mask matrix; performing vector anti-aliasing interpolation reconstruction on the frequency-space domain data and the mask matrix, so as to obtain a frequency-space domain reconstruction result; and inversely transforming the frequency-space domain reconstruction result to the time-space domain to obtain a time domain three-component three-dimensional data anti-aliasing reconstruction result. The present invention can effectively solve the problem of vector anti-aliasing reconstruction for three-component seismic data that contain both irregular and regular missing traces, thus improving the accuracy of effective wave event identification.

Classes IPC  ?

• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements

Abrégé

A rapid dispersion and hydration device for a polymer drag reducer. The rapid dispersion and hydration device comprises a stirring drum (1), a first stirring assembly (2), a second stirring assembly (3) and a stirring shaft (4), wherein the first stirring assembly (2) has a first stirring cavity (21), and is configured to be capable of performing primary shearing on a mixed solution during rotation to obtain a pre-dispersed mixed solution; and a second stirring cavity (31) is used for receiving a secondary mixed solution, and the second stirring assembly (3) is configured to be capable of performing secondary shearing on the secondary mixed solution during rotation to obtain a dispersed mixed solution. The device can achieve the aim of rapid dispersion and hydration. By means of a processing method in which wetting, dispersion and dissolution, and hydration enhancement are performed step by step, the reaction effect during proportioning and blending is improved, the uniform mixing and rapid hydration process of a polymer drag reducer is achieved, the proportioning and blending effect is ensured while the proportioning and blending efficiency is improved, and the performance damage to a mixed solution is greatly reduced; in addition, the reaction process is accelerated, and the polymer performance is rapidly exerted.

Classes IPC  ?

• B01J 19/18 - Réacteurs fixes avec éléments internes mobiles
• B01F 23/50 - Mélange de liquides avec des solides
• B01F 23/53 - Mélange de liquides avec des solides en utilisant des agitateurs entraînés

Abrégé

A winding device and method for initial steel wire rope winding on a drawworks, and a drilling rig. The winding device comprises: a telescopic slip (2), wherein a channel for accommodating a steel wire rope (7) and allowing same to pass through is formed in the slip (2); a slip holder (1) partially sleeved on the outer side of the slip (2); a pressing plate (3) defining an accommodating space with the slip holder (1), wherein the slip (2) is mounted in the accommodating space, and the pressing plate (3) can apply a radial pressure to the slip (2); a traction device, wherein the traction device is connected to the slip holder (1) and can provide a traction force away from a drawworks (12) to the slip holder (1); clamping sleeves (4) at least partially surrounding the slip holder (1) and the pressing plate (3); a wear-proof sleeve (6) arranged on the inner surface of the slip (2) and having the inner wall provided with lines that slot into the outer peripheral surface of the steel wire rope (7); and tightening bolts (5) in threaded connection with threaded holes in the sides of the clamping sleeves (4) close to the pressing plate (3). By means of the technical solution, the slip (2) is surrounded by the pressing plate (3) and the slip holder (1), and the pressing plate (3) applies a radial pressure to the slip (2), so that the slip (2) presses against the steel wire rope (7).

Classes IPC  ?

• B66D 1/30 - Tambours ou cylindres pour cordes, câbles ou chaînes

Abrégé

An oil wellbore repair device, system and method. The oil wellbore repair device comprises: a driving mechanism (1) and an applying mechanism (2), wherein the applying mechanism (2) comprises an accommodating unit for holding a repair material and an applying component (22) for applying the repair material to a damaged part of an oil wellbore; the applying component (22) is in transmission connection with the driving mechanism (1) and has a guide channel (221) capable of communicating the accommodating unit with the oil wellbore; and the guide channel (221) is configured such that when an outlet of the guide channel (221) moves to a position where the damaged part of the oil wellbore is located, an inlet of the guide channel (221) is in communication with the accommodating unit. The driving mechanism is driven to drive the applying component to move, so as to cause the guide channel to be in communication with the accommodating cavity, such that the repair material enters the guide channel, and is heated by a heating component to a molten state after entering the guide channel, and the repair material in the molten state flowing out of the guide channel can be applied to the damaged part of the oil wellbore, which can simplify the repair process for the damaged part of the oil wellbore.

Classes IPC  ?

• E21B 29/10 - Remise en état des tubages de puits, p. ex. redressage

Abrégé

Disclosed are a self-propelled measurement device for downhole data of an oil well, and a self-propelled measurement method. The device comprises a housing (1), a testing device, a sink and float control device, a hovering device and a power supply device, wherein the housing is provided with a propeller (2) for driving the housing to move forward or backward; the testing device and the sink and float control device are arranged on the housing, the sink and float control device is arranged on the housing or is a part of the housing, and the testing device is used to collect downhole data and position the self-propelled measurement device; the sink and float control device is used to adjust the sink and float height of the self-propelled measurement device; the hovering device is used to enable the self-propelled measurement device to hover at a preset position in a well; and the power supply device is used to supply electricity to the testing device, the sink and float control device and the hovering device.

Classes IPC  ?

• E21B 47/00 - Relevés dans les trous de forage ou dans les puits
• E21B 47/002 - Relevés dans les trous de forage ou dans les puits par inspection visuelle

Abrégé

Provided in the present invention are an interface engineering method for a perovskite solar cell, and an inverted perovskite solar cell and a preparation method therefor. The interface engineering method comprises: providing a first metal oxide nano-particle layer between a hole transport layer and a transparent conductive thin-film glass layer; and providing a second metal oxide nano-particle layer between the hole transport layer and a perovskite light-absorbing layer. The inverted perovskite solar cell comprises: a transparent conductive thin-film glass layer, a first metal oxide nano-particle layer, a hole transport layer, a second metal oxide nano-particle layer, a perovskite light-absorbing layer, an electron transport layer, and an electrode. By means of the interface engineering method provided in the present invention, the surface wettability of a hole transport layer is improved, the arrangement uniformity of the hole transport layer is also improved, and the photoelectric conversion efficiency of a perovskite solar cell is thus improved.

Classes IPC  ?

• H10K 71/12 - Dépôt d'une matière active organique en utilisant un dépôt liquide, p. ex. revêtement par centrifugation
• H10K 71/15 - Dépôt d'une matière active organique en utilisant un dépôt liquide, p. ex. revêtement par centrifugation caractérisé par le solvant utilisé
• H10K 71/40 - Traitement thermique, p. ex. recuit en présence d'une vapeur de solvant
• H10K 30/15 - Dispositifs à semi-conducteurs sensibilisés à large bande interdite, p. ex. TiO2sensibilisé aux colorants

Abrégé

Provided in the present disclosure are a variable-diameter device for measuring a viscous liquid and a viscosity measurement method. The variable-diameter device comprises: a variable-diameter stator mechanism, which is provided with a support frame and an elastic body sleeved on the support frame, the support frame having a first adjustment frame and a second adjustment frame which are connected to each other; and an adjustment structure, which is provided with a shaft rod structure and at least one adjustment component which are connected to each other, the shaft rod structure being arranged inside the support frame, and the at least one adjustment component being in a circumferentially-slidable connection to the support frame. The second adjustment frame can be circumferentially-movably arranged relative to the first adjustment frame by means of the at least one adjustment component, so as to change the radial dimension of the support frame. The variable-diameter device provided by the present disclosure satisfies the requirement of changing the stator diameter in a rotary viscometer in the technical field of rotary viscosity measurement, thereby achieving the purpose of dynamically adjusting the measuring range of the viscometer during viscosity measurement.

Classes IPC  ?

• G01N 11/14 - Recherche des propriétés d'écoulement des matériaux, p. ex. la viscosité, la plasticitéAnalyse des matériaux en déterminant les propriétés d'écoulement en déplaçant un corps à l'intérieur du matériau en utilisant des corps en rotation, p. ex. moulinet

Abrégé

The present disclosure provides a fluid property measurement apparatus and a fluid property online measurement method. The apparatus comprises: a measurement cylinder, provided with a fluid inlet and a fluid outlet; a liquid stabilizing mechanism, provided with a front liquid delivery structure and a gas conveying structure, the front liquid delivery structure being provided with a defoaming tank and a detachable pipe connected to the defoaming tank, the detachable pipe being connected to the fluid inlet, and the gas conveying structure being provided with a gas channel capable of injecting gas into the measurement cylinder; and a measurement mechanism, provided with a quality measurement device connected to the bottom of the measurement cylinder and a liquid level measurement device connected inside the measurement cylinder. The problem of performing online measurement on the density of a drilling fluid in the technical field of fluid detection is solved.

Classes IPC  ?

• G01N 9/00 - Recherche du poids spécifique ou de la densité des matériauxAnalyse des matériaux en déterminant le poids spécifique ou la densité

Abrégé

The present invention relates to the field of exploitation of petroleum and natural gas. Disclosed are a self-adaptive temporary plugging agent for plugging irregular holes, and a preparation method therefor and the use thereof. The temporary plugging agent comprises a flexible material and a tough material layer coated outside the flexible material, wherein the tough material layer is made of a polyurea, and the tough material layer has a thickness of greater than or equal to 0.5 mm. The temporary plugging agent provided in the present invention has a double-layer structure that is soft inside and tough outside, wherein the inner layer is made of a flexible material and can be easily deformed, the outer layer is made of a tough material, the bottom hole pressure is within the compressive strength thereof, and the coating layer of the tough material can sufficiently deform along with the inner layer flexible material without damage.

Classes IPC  ?

• C09K 8/508 - Composés macromoléculaires
• C09K 8/42 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits
• C09D 175/02 - Polyurées
• C08L 75/02 - Polyurées
• C08G 18/66 - Composés des groupes , ou
• C08G 18/32 - Composés polyhydroxylésPolyaminesHydroxyamines
• C08G 18/50 - Polyéthers contenant des hétéro-atomes autres que l'oxygène

Abrégé

An intelligent pressure control system and method based on multi-channel multi-mode self-optimization communication. The system comprises: a communication mode management module, which is configured to optimize, on the basis of communication requirements of pressure control drilling data of different data sources, a communication module corresponding to pressure control drilling data of each data source; a multi-channel communication module, which comprises a plurality of channels, wherein each channel is implemented by using at least one communication module; a data collection module, which is configured to collect the pressure control drilling data of each data source by means of the communication module corresponding to each data source; an intelligent decision-making module, which is configured to determine pressure control parameters on the basis of the collected pressure control drilling data, generate a pressure control instruction, and feed the pressure control instruction back to an automatic control module by means of the multi-channel communication module; and the automatic control module, which is configured to send, by means of the multi-channel communication module, the pressure control instruction to a pressure control execution mechanism for executing a pressure control operation.

Classes IPC  ?

• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures
• E21B 21/08 - Commande ou surveillance de la pression ou de l'écoulement du fluide de forage, p. ex. remplissage automatique des trous de forage, commande automatique de la pression au fond
• E21B 44/00 - Systèmes de commande automatique spécialement adaptés aux opérations de forage, c.-à-d. systèmes à fonctionnement autonome ayant pour rôle d'exécuter ou de modifier une opération de forage sans l'intervention d'un opérateur humain, p. ex. systèmes de forage commandés par ordinateurSystèmes spécialement adaptés à la surveillance de plusieurs variables ou conditions de forage

Abrégé

The present invention provides a chemically bonded lost circulation additive, a composite lost circulation additive comprising same, a drilling fluid, and a use thereof in drilling engineering. The chemically bonded lost circulation additive comprises a core layer and an inorganic material coated on the outer surface of the core layer, wherein the material of the core layer has a structure as shown in formula (I). The lost circulation additive of the present application demonstrates a higher success rate of one blockage operation, better pressure-bearing capacity, better compatibility with a drilling fluid, stronger temperature resistance, stronger contamination resistance, and stronger salt tolerance.

Classes IPC  ?

• C09K 8/42 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits

Abrégé

A frequency-division compression method for pre-stack seismic data. The method comprises: acquiring pre-stack seismic data (S1); performing a Hartley transform on the pre-stack seismic data, so as to obtain transformed seismic data (S2); dividing the transformed seismic data into low-frequency data and high-frequency data (S3), wherein the low-frequency data comprises at least one low-frequency transform coefficient group, and the high-frequency data comprises at least one high-frequency transform coefficient group; and respectively performing compression coding at different levels on the low-frequency transform coefficient group and the high-frequency transform coefficient group, so as to obtain compressed data (S4), wherein the compression coding level of the low-frequency transform coefficient group is greater than the compression coding level of the high-frequency transform coefficient group. Further provided is a frequency-division compression apparatus for pre-stack seismic data. High-level coding is performed on a low-frequency portion, in which the main energy of seismic data is concentrated, so as to ensure a signal-to-noise ratio, and low-level coding is performed on a high-frequency portion, so as to increase a compression ratio.

Classes IPC  ?

• G01V 1/32 - Transformation d'un mode d'enregistrement en un autre
• H04N 1/41 - Réduction de la largeur de bande ou de la redondance

Abrégé

A downhole throttling device for full-life-cycle mining and a power supply method therefor, relating to the technical field of oil production and gas production of oil and gas fields. The downhole throttling device comprises a thermoelectric power generation mechanism (1) for power generation and a throttling mechanism for throttling a fluid entering the thermoelectric power generation mechanism (1). The throttling mechanism comprises at least one throttling unit (3). The thermoelectric power generation mechanism (1) can generate electric energy from the temperature difference between a low-temperature fluid subjected to throttling expansion and a surrounding environment so as to be supplied to the downhole throttling device. The downhole throttling device has a simple structure and a flexible mounting mode, requires no manual intervention, and has low costs, and salvage and replacement of the downhole throttling device can be avoided.

Classes IPC  ?

• E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits

Abrégé

A method for fracturing dry hot rock and a method for extracting heat from dry hot rock. The method for fracturing dry hot rock comprises the following steps: (1) selecting a cased hole completion section in a heat-extracting well located in dry hot rock, and dividing the cased hole completion section into n sections to be treated; (2) filling an oil pipe of the cased hole completion section with a fracturing fluid in a first displacement, and adding a soluble ball along with the fracturing fluid; (3) selecting a fracture development layer section in the section to be treated to perform sand blasting perforation, so as to obtain a target layer section; (4) subjecting the target layer section to fracturing construction by using supercritical carbon dioxide, so as to obtain a fracturing section; and (5) repeatedly performing steps (2)-(4), until the fracturing of all the sections to be treated is completed, wherein n is selected from 8-12.

Classes IPC  ?

• E21B 43/00 - Procédés ou dispositifs pour l'extraction de pétrole, de gaz, d'eau ou de matériaux solubles ou fusibles ou d'une suspension de matières minérales à partir de puits
• E21B 43/116 - Perforateurs à balles ou à charge profilée
• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures

Abrégé

The present invention provides a low electrical conductivity inhibitor and a preparation method therefor, and a drilling fluid containing the low electrical conductivity inhibitor. The preparation method for the low electrical conductivity inhibitor comprises: mixing tertiary amine and an epoxy coupling agent, carrying out a first heating reaction, cooling and then adding a terminator, and carrying out second heating and then adding a conditioning agent to obtain a low electrical conductivity inhibitor. The drilling fluid containing the inhibitor can solve the technical problem that existing brine drilling fluids have high electrical conductivity and thus affect the evaluation results of low resistivity oil layers from array induction logging in the oil layers, and meet the requirements for the low electrical conductivity of the drilling fluid, collapse prevention, and environmental friendliness.

Classes IPC  ?

• C09K 8/03 - Additifs spécifiques à usage général dans les compositions pour le forage des puits

Abrégé

A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may comprise a diamond body and a metallic substrate. The diamond body comprises a first phase comprising a binderless intercrystalline diamond- to-diamond bonded matrix extending throughout the diamond body; and a second phase comprising a binder/catalyst within interstitial regions of intercrystalline bonded diamond matrix. The first phase is substantially free of the binder/catalyst material. The metallic substrate is in direct contact with the diamond body. The diamond body includes a first region comprising the catalyst/binder material and a second region is substantially free of the binder/catalyst. The second region may be positioned along a wear surface of the supcrabrasivc compact.

Classes IPC  ?

• B24D 3/10 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques métalliques à structure poreuse ou alvéolaire, p. ex. pour utiliser avec des diamants en tant qu'abrasifs
• B24D 3/06 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques métalliques
• B24D 7/14 - Meules de dureté variableMeules composites comprenant différents abrasifs

Abrégé

A low-end rheology modifier for adjusting rheological characteristics of water-based drilling fluid systems, particularly for high salt, high density drilling fluids in high temperature and high-pressure applications. The low end rheology modifier comprises a copolymer and laponite clay, the copolymer comprising tert-Butylacrylamidosulfonic acid (TBAS) and n-vinylpyrrolidone (NVP) crosslinked with N,N′-Methylenebis(acrylamide).

Classes IPC  ?

• C09K 8/24 - Polymères
• C09K 8/14 - Compositions contenant de l'argile

Abrégé

A streamline deepwater node piezoelectric detector and a marine seismic node. The piezoelectric detector comprises a detection assembly, a connector and an acoustically-transparent layer; the acoustically-transparent layer is connected to the connector; the detection assembly comprises a piezoelectric ceramic tube and end covers; the piezoelectric ceramic tube is coaxial with the connector, is provided with the end covers and is spaced apart from the connector. The marine seismic node comprises the piezoelectric detector. The piezoelectric detector provided by the present invention uses a streamline configuration mode, so as to improve the water flow impact resistance of the piezoelectric detector; meanwhile, the piezoelectric ceramic tube is spaced apart from the connector, such that when vibration of the node is transmitted to the connector, the vibration will not be transmitted to the piezoelectric ceramic tube or only a small amount of same is transmitted to the piezoelectric ceramic tube, and the piezoelectric ceramic tube will not be affected by node vibration or is only slightly affected by node vibration, thus improving the quality of data collected by the piezoelectric detector, and improving the quality of subsequent seismic profile data processing.

Classes IPC  ?

• G01V 1/18 - Éléments récepteurs, p. ex. sismomètre, géophone

Abrégé

Embodiments of the present invention relate to the technical field of seismic data processing, and provide an ocean node leap second correction method and system. The method comprises: acquiring a shooting sequence list, and synchronously determining an enabling state of a leap second correction function; when the leap second correction function is enabled, on the basis of the shooting sequence list, determining a data file extraction position of a current shooting moment as an initial position; comparing the current shooting moment with a corresponding leap second moment, and determining a correction scheme of the initial position on the basis of a comparison result; performing correction on the initial position on the basis of the correction scheme to obtain an actual data file extraction position of a current moment; and traversing shooting moments in the shooting sequence list to obtain an actual extraction position of each shooting moment, and executing data file extraction on the basis of the actual extraction position of each shooting moment to obtain complete data. The solution of the present invention solves the problem of data inaccuracy caused by leap seconds in marine seismic data acquisition.

Classes IPC  ?

• G04G 5/00 - Mise à l'heure, c.-à-d. correction ou changement de l'indication de l'heure
• G01V 1/20 - Aménagements d'éléments récepteurs, p. ex. oscillogrammes géophoniques

Abrégé

A formation fracturing detection method, belonging to the technical field of logging. The method comprises: acquiring frequency spectrum data of original array waveform data; calculating the slowness value of each acoustic wave vibration mode; then on the basis of an iterative operation of hierarchical clustering and threshold division, acquiring a dispersion curve greater than a preset resolution; using a slowness-frequency projection method to project the slowness and frequency of the dispersion curve onto an axis of slowness, so as to obtain a post-fracturing slowness-frequency projection curve; overlaying same with a pre-fracturing slowness-frequency projection curve, so as to obtain a slowness change value at the lowest frequency; and finally, according to the slowness change value at the lowest frequency, determining the degree of formation fracturing, thereby obtaining a formation fracturing detection result. The method can accurately identify changes in transverse wave velocities caused by formation fracturing and the degree of formation fracturing. Also provided are a formation fracturing detection apparatus, a storage medium and a processor.

Classes IPC  ?

• G01V 1/40 - SéismologieProspection ou détection sismique ou acoustique spécialement adaptées au carottage
• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements

Abrégé

A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may comprise a diamond body and a metallic substrate. The diamond body comprises a first phase comprising a binderless intercrystalline diamond-to-diamond bonded matrix extending throughout the diamond body; and a second phase comprising a binder/catalyst within interstitial regions of intercrystalline bonded diamond matrix. The first phase is substantially free of the binder/catalyst material. The metallic substrate is in direct contact with the diamond body. The diamond body includes a first region comprising the catalyst/binder material and a second region is substantially free of the binder/catalyst. The second region may be positioned along a wear surface of the superabrasive compact.

Classes IPC  ?

• B24D 3/10 - Propriétés physiques des corps ou feuilles abrasives, p. ex. surfaces abrasives de nature particulièreCorps ou feuilles abrasives caractérisés par leurs constituants les constituants étant utilisés comme agglomérants et étant essentiellement inorganiques métalliques à structure poreuse ou alvéolaire, p. ex. pour utiliser avec des diamants en tant qu'abrasifs

Abrégé

A method for eliminating coherent fading noise of a DAS. The method comprises: acquiring original IQ data, which is output by a distributed fiber-optic sensing collection instrument (S101); performing a phase decoupling operation on the original IQ data, so as to obtain a shifted phase of a signal to be subjected to measurement (S102); on the basis of the shifted phase obtained after decoupling, and the amplitude of the original IQ data, determining updated IQ data (S103); performing local spatial-window summation for the updated IQ data, so as to determine summed IQ data (S104); on the basis of the summed IQ data, determining a demodulated phase from which coherent fading noise is eliminated (S105); and performing phase unwrapping on the demodulated phase from which coherent fading noise is eliminated, so as to obtain fiber-optic-sensing demodulated phase data from which coherent fading noise is eliminated (S106). Phase demodulation can be efficiently performed, and the impact of coherent fading noise can be eliminated, such that the accuracy of collected fiber-optic sensing data is improved, thereby meeting actual requirements of technicians. Further disclosed are an apparatus for eliminating coherent fading noise of a DAS, and an electronic device and a computer-readable storage medium.

Classes IPC  ?

• G01H 9/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores en utilisant des moyens sensibles aux radiations, p. ex. des moyens optiques

Abrégé

A distributed displacement sensing phase demodulation method, comprising: determining an IQ demodulation initial phase and an IQ signal amplitude on the basis of an IQ signal (S101); performing a phase decoupling operation on the IQ demodulation initial phase, and sequentially subtracting from the IQ demodulation initial phase an initial phase of an optical fiber sensing signal sensing position, an initial phase of a laser pulse source and an accumulated phase along paths in a transmission process, so as to obtain a displacement sensing phase to be measured (S102); performing phase unwinding processing on the displacement sensing phase to be measured, so as to obtain an unwound displacement sensing phase to be measured (S103); performing calculation on the basis of the unwound displacement sensing phase to be measured, so as to obtain displacement sensing data (S104); determining a coherent fading position in the displacement sensing data on the basis of the IQ signal amplitude, and eliminating the impact of coherent fading by using linear interpolation of adjacent normal points, so as to obtain displacement sensing data that has been subjected to coherent fading noise suppression (S105); and transposing, into data recorded in trace order, the displacement sensing data that has been subjected to coherent fading noise suppression, and performing denoising by means of subsequent data processing, so as to obtain final phase-demodulated displacement sensing data (S106). By means of the phase demodulation method, displacement sensing phase demodulation can be realized, and distributed displacement response information of a wave field to be measured is recovered. In addition, further provided are a distributed displacement sensing phase demodulation apparatus, and an electronic device and a readable storage medium.

Classes IPC  ?

• G01H 9/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores en utilisant des moyens sensibles aux radiations, p. ex. des moyens optiques

Abrégé

An ocean bottom node multi-component rotation quality control method based on a cross-correlation principle, comprising: acquiring P component data collected by an ocean bottom node and rotated X, Y and Z three-component data, and separating P, X, Y and Z four-component data (S1); preprocessing the separated four-component data (S2); acquiring a comprehensive polarity analysis graph of a P component on the basis of the P component data in the preprocessed four-component data (S3); separately calculating correlation coefficients between P component hydrophone data and rotated X, Y, and Z three-component geophone data (S4); forming a polarity analysis graph of rotated X, Y and Z components on the basis of a polarity quality control graph of the P component and the correlation coefficients between the P component hydrophone data and the rotated X, Y and Z three-component geophone data (S5); and performing quality control on the rotation effect of the rotated X, Y and Z three-component data on the basis of the polarity analysis graph of the rotated X, Y and Z components (S6). Also provided is an ocean bottom node multi-component rotation quality control apparatus based on a cross-correlation principle.

Classes IPC  ?

• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements
• G01V 1/36 - Exécution de corrections statiques ou dynamiques sur des enregistrements, p. ex. correction de l'étalementÉtablissement d'une corrélation entre signaux sismiquesÉlimination des effets produits par un excès d'énergie
• G01V 1/38 - SéismologieProspection ou détection sismique ou acoustique spécialement adaptées aux zones recouvertes d'eau

Abrégé

The Patent Application discloses a hydrogenated nitrile rubber. The hydrogenated nitrile rubber may comprise 100 parts by weight of hydrogenated nitrile rubber having a bound acrylonitrile content of 17% or more, a Mooney viscosity ML1+4 (100° C.) of from about 20 to about 100 and no less than 140 parts by weight in sum total as a filler comprising carbon black.

Classes IPC  ?

• C08K 3/04 - Carbone

Abrégé

The present application discloses a compressed sensing-based optimized layout method and apparatus for surface area point locations. The method comprises: obtaining initial offset data and using same as current offset data; and repeatedly executing the following steps until an iteration termination condition is met, and outputting optimal offset data: performing point location offset optimization on the basis of construction observation system parameters, a theoretical deployment SPS file and the current offset data to obtain an offset-optimized SPS file; deleting repeated point locations in the offset-optimized SPS file to obtain compressed sensing data; performing simulated reconstruction on the compressed sensing data on the basis of a preset undersampling ratio and a fold; performing simulated reconstruction feasibility verification by comparing the simulated reconstruction result with a theoretical deployment SPS acquisition data attribute, to obtain a reconstruction feasibility verification result; and when it is determined on the basis of the reconstruction feasibility verification result that the iteration termination condition is not met, adjusting the current offset data. The present application has high point location optimization accuracy.

Classes IPC  ?

• G06F 30/20 - Optimisation, vérification ou simulation de l’objet conçu

Abrégé

The patent application discloses a hydrogenated nitrile rubber. The hydrogenated nitrile rubber may comprise (100) parts by weight of hydrogenated nitrile rubber having a bound acrylonitrile content of 17% or more, a Mooney viscosity ML1 +4 (100° C.) of from about 20 to about 100 and no less than 140 parts by weight in sum total as a filler comprising carbon black.

Classes IPC  ?

• C08L 9/02 - Copolymères avec l'acrylonitrile
• C08K 3/04 - Carbone
• C08C 19/02 - Hydrogénation

Abrégé

The apparatus for anchoring a downhole tool to a casing includes a spiral threaded engagement and a raised spiral threaded engagement between a slip device and first and second cones. The first cone is moved closer to the second cone within the slip device to expand the slip device from an initial diameter in a run-in configuration to an extended diameter in a set configuration. The initial diameter corresponds to the spiral threaded engagement, and the extended diameter corresponds to the raised spiral threaded engagement. The spiral threaded engagement of the first cone is in the opposite spiral direction to the spiral threaded engagement of the second cone. There are multiple locking systems incorporated to prevent premature expansion and reverse rotating the cones from the slip device. The invention includes both the method of assembling the apparatus and the method of using the apparatus to anchor to a casing.

Classes IPC  ?

• E21B 23/01 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour ancrer les outils ou similaires
• E21B 47/09 - Localisation ou détermination de la position d'objets dans les trous de forage ou dans les puitsIdentification des parties libres ou bloquées des tubes

Abrégé

The apparatus (10) for anchoring a downhole tool to a casing includes a spiral threaded engagement and a raised spiral threaded engagement between a slip device (40) and first and second cones (20, 30). The first cone (20) is moved closer to the second cone (30) within the slip device (40) to expand the slip device (40) from an initial diameter in a run-in configuration to an extended diameter in a set configuration. The initial diameter corresponds to the spiral threaded engagement, and the extended diameter corresponds to the raised spiral threaded engagement. The spiral threaded engagement of the first cone (20) is in the opposite spiral direction to the spiral threaded engagement of the second cone (30). There are multiple locking systems (60, 54, 70, 80) incorporated to prevent premature expansion and reverse rotating the cones from the slip device. The invention includes both the method of assembling the apparatus and the method of using the apparatus to anchor to a casing.

Classes IPC  ?

• E21B 23/01 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour ancrer les outils ou similaires
• E21B 23/06 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour le montage des packers
• E21B 33/129 - PackersBouchons à patins mécaniques pour accrochage dans le tubage
• E21B 33/126 - PackersBouchons à cuvette ou jupe élastiques actionnées par pression d'un fluide
• E21B 17/042 - AccouplementsJoints entre tige et trépan, ou entre tiges filetés
• E21B 34/10 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par un fluide de commande provenant de l'extérieur du trou de forage

Abrégé

The present invention provides nano rubber and carbon nanotube composite toughened oil well cement and a preparation method therefor. In parts by weight, the raw material composition comprises: 90-120 parts of oil well cement, 40-60 parts of water, 2-10 parts of nano rubber, 0.02-0.1 part of carbon nanotubes, 0.1-0.5 part of an oil well cement dispersant, and 0.2-1 part of a defoaming agent. The present invention also provides a preparation method for the cement. Cement stone prepared by the present invention shows desirable mechanical and shrinkage performance, satisfies well cementation construction requirements in fluidity, can be used for high-performance well cementation cement system design, research, development and application, and satisfies long-acting sealing requirements of a cement ring in a complex stress environment.

Classes IPC  ?

• C04B 28/00 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates
• C09K 8/467 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits contenant des liants inorganiques, p. ex. ciment Portland contenant des additifs pour des utilisations spécifiques

Abrégé

A visual workover operation method and an operation device. The method comprises the following steps: lowering; anchoring; catching: a fishing structure of a downhole tool string moving forwards to catch a fish, specifically, monitoring pressure information of the fishing structure, and, on the basis of the pressure information, determining whether the fishing structure has caught the fish; sticking releasing: the fishing structure of the downhole tool string moving backwards to fish up the fish, specifically, monitoring tension information of the fishing structure, and, on the basis of the tension information, determining whether the fishing structure has fished up the fish; and unanchoring: separating an anchoring sub from a wellbore wall for unanchoring, specifically, monitoring anchoring pressure information within the anchoring sub, and, on the basis of the anchoring pressure information, determining an anchoring state of the anchoring sub; monitoring angular displacement information and travel displacement information of a rotating shaft of a motor; and, on the basis of the angular displacement information, the travel displacement information and the anchoring state, determining an operational state of the downhole tool string.

Classes IPC  ?

• E21B 31/20 - Outils de préhension, p. ex. pinces ou grappins saisissant intérieurement, p. ex. harpons

Abrégé

The present invention provides a fiber-based secondary cross-linked profile control and water plugging agent, a preparation method therefor and a use thereof. The method comprises: adding a template carrier to aldehyde cellulose, to form a Pickering emulsion; reacting the Pickering emulsion, a long-chain chelating agent and a catalyst, to obtain a unilaterally modified aldehyde cellulose; mixing the unilaterally modified aldehyde cellulose with polyacrylamide, to obtain a profile control and water plugging agent. The profile control and water plugging agent of the present invention has a strong interaction with rock surfaces, and increases the temperature and salt resistance of a gel system; the grafted long-chain chelating agent further increases the gel strength, and causes the system to have self-healing functionality.

Classes IPC  ?

• C09K 8/512 - Composés macromoléculaires contenant des agents de réticulation
• C08B 15/02 - OxycelluloseHydrocelluloseHydrate de cellulose
• C08J 3/03 - Production de solutions, dispersions, latex ou gel par d'autres procédés que ceux utilisant les techniques de polymérisation en solution, en émulsion ou en suspension dans un milieux aqueux

Abrégé

A method for characterizing a three-dimensional structure of a solid-phase particle packing void in drilling fluid, an apparatus and a device. The method comprises: S110, acquiring scanning data of drilling fluid; S120, constructing a three-dimensional space structure of the drilling fluid on the basis of the scanning data, wherein a three-dimensional structure of a solid-phase particle packing void is characterized in the three-dimensional space structure; S130, on the basis of the three-dimensional space structure, calculating a parameter value corresponding to a geometrical morphology influence parameter; and S140, using the parameter value of the geometrical morphology influence parameter to determine a void structure type of the drilling fluid, wherein the void structure type is used for characterizing the three-dimensional structure of the solid-phase particle packing void in the drilling fluid.

Classes IPC  ?

• G01N 15/08 - Recherche de la perméabilité, du volume des pores ou de l'aire superficielle des matériaux poreux

Abrégé

TXTXTXTXTXTX of the steel plate before forming, obtaining the actual diameter expansion rate of the steel plate before forming during pipe manufacturing; (4) according to the actual diameter expansion rate, performing edge milling to obtain a steel plate required for forming; and (5) performing forming and welding on the steel plate required for forming, and using the same diameter expansion parameters to perform mechanical diameter expansion on all the welded pipes obtained by welding so as to obtain the oil and gas conveying steel pipes. The steel pipes prepared from said method have a narrow yield strength fluctuation range.

Classes IPC  ?

• G01N 3/08 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique par application d'efforts permanents de traction ou de compression
• G01N 3/02 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique Parties constitutives

Abrégé

The present application relates to the technical field of seismic exploration. Disclosed are a synchronous excitation method and apparatus for controlled seismic sources. The method comprises: loading multiple frequency-divided scanning signals into different controlled seismic sources multiple times, so as to obtain multiple controlled seismic source groups, wherein controlled seismic sources in each controlled seismic source group correspond to the frequency-divided scanning signals on a one-to-one basis; controlling the multiple controlled seismic source groups to sequentially excite scanning according to a first time interval threshold value in a target region, wherein the multiple controlled seismic sources in each controlled seismic source group are synchronously excited, the excitation time interval of different controlled seismic source groups is the first time interval threshold value, and the first time interval threshold value is determined on the basis of the degree of harmonic interference between different frequency-divided scanning signals and a first distance threshold value; and using seismic data collected by each controlled seismic source group and a synthetic reference signal to perform correlation processing, so as to obtain multiple pieces of correlated seismic single-shot data, wherein the synthetic reference signal is synthesized by means of vertically superimposing the multiple frequency-divided scanning signals. The present application can reduce aliasing noise in seismic data.

Classes IPC  ?

• G01V 1/02 - Production d'énergie sismique
• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements

Abrégé

A method for determining velocity of a subsurface medium includes: acquiring, by an ocean bottom node, seismic data generated by exciting a monopole source at a shot point; determining a dipole source and a zero-phase monopole source according to the monopole source, and combining the dipole source and the zero-phase monopole source to obtain a directional source; exchanging the position of the ocean bottom node with the position of the shot point and, acquiring, by the exchanged node, synthetic data generated by exciting the directional source at the exchanged shot point; and determining a target velocity model according to an up going wavefiled of the seismic data and the synthetic data.

Classes IPC  ?

• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements
• G01V 1/30 - Analyse

Abrégé

Disclosed are a mechanical pressure gauge and a measurement system. The mechanical pressure gauge comprises a pressure measurement component (11), a pressure recording component (12), a timer (13), a temperature measurement component (14), and a temperature recording component (15), wherein the pressure measurement component is used for measuring the pressure of a fluid; the temperature measurement component is used for measuring the temperature of the fluid; the timer is used for performing timing; the pressure recording component is connected to the pressure measurement component and the timer and is used for recording the change relationship of pressure over time; the temperature recording component is connected to the temperature measurement component and the timer and is used for recording the change relationship of temperature over time. The mechanical pressure gauge uses a mechanical principle to synchronously measure and record pressure and temperature, and therefore is applicable to a downhole environment under ultra-high temperature and high pressure, and can meet the long-acting reliable working requirements of ultra-deep well oil testing.

Classes IPC  ?

• E21B 47/06 - Mesure de la température ou de la pression

Abrégé

PcmPcm≤0.16; (2) performing edge milling on edges of the steel strip, such that welding grooves may be formed on the edge-milled steel strip after same is coiled; (3) coiling the edge-milled steel strip to obtain a spiral cylinder; and (4) using special hydrogen-resistant welding wires to weld the spiral cylinder by means of a double-wire tandem automatic submerged arc welding process, so as to obtain a spiral submerged arc welded pipe for a hydrogen transport pipeline. Thus, a spiral submerged arc welded pipe for a hydrogen transport pipeline that has good weldability, good comprehensive mechanical properties and high hydrogen resistance can be manufactured.

Classes IPC  ?

• B23P 15/00 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe
• B23K 35/30 - Emploi de matériaux spécifiés pour le soudage ou le brasage dont le principal constituant fond à moins de 1550 C
• B23K 9/18 - Soudage à l'arc submergé

Abrégé

A drag and torque reducing tool having a self-stabilizing disc valve type hydraulic pulse sub. The drag and torque reducing tool comprises: a vibration sub (1), which comprises a first shell structure, wherein a core shaft (11) is connected into the first shell structure, a first center hole (110) penetrates through the core shaft, and the core shaft is connected to an upper drill string; and a pulse sub (2), which comprises a second shell structure (21), wherein a stabilizing shaft (22) is arranged in the second shell structure, the second shell structure is circumferentially rotatable relative to the stabilizing shaft, an eccentric weight sleeve (23) and a self-stabilizing disc valve (24) are arranged on the stabilizing shaft at an interval, and a flow annular gap (210) is formed between the eccentric weight sleeve and the second shell structure; a rotating valve (25) is fixedly arranged in the second shell structure; and a first flow channel (240) is arranged on the self-stabilizing disc valve, a second flow channel (250) is arranged on the rotating valve, the second flow channel is intermittently communicated with the first flow channel to generate a pressure pulse, and the core shaft generates axial vibration under the action of the pressure pulse. According to the drag and torque reducing tool, by means of the self-stability of eccentric weight, the self-stabilizing disc valve structure generates the pressure pulse, and on the basis of the impact vibration formed by the vibration sub on the drill string, the drag and torque in the drilling process are reduced.

Classes IPC  ?

• E21B 7/24 - Forage utilisant des moyens vibrants ou oscillants, p. ex. des masses déséquilibrées
• E21B 28/00 - Dispositions pour la génération de vibrations pour les trous de forage ou les puits, p. ex. pour activer la production
• E21B 7/04 - Forage dirigé

Abrégé

1470147070 alkenyl, a substituent for the substitution is selected from at least one of hydroxyl, halogen, cyano, nitro, and amino, x is selected from a positive integer of 20-50, and y is selected from a positive integer of 20-40. In the present invention, the surfactant comprising the fatty alcohol copolymer has the characteristics of good high-temperature resistance and salt resistance and low oil/water interface tension.

Classes IPC  ?

• C09K 8/584 - Compositions pour les méthodes de récupération assistée pour l'extraction d'hydrocarbures, c.-à-d. pour améliorer la mobilité de l'huile, p. ex. fluides de déplacement caractérisées par l'utilisation de tensio-actifs spécifiques
• C09K 8/58 - Compositions pour les méthodes de récupération assistée pour l'extraction d'hydrocarbures, c.-à-d. pour améliorer la mobilité de l'huile, p. ex. fluides de déplacement
• C08G 65/28 - Éthers cycliques et composés hydroxylés
• C07C 43/03 - Éthers toutes les liaisons sur l'oxygène de la fonction éther étant sur des atomes de carbone acycliques
• C07C 43/02 - Éthers
• E21B 43/22 - Emploi de produits chimiques ou à activité bactérienne

Abrégé

22 in the tail gas treated by the process system is ≤50 mg/Nm3, and the requirements for full-period standard reaching of sulfur dioxide emission of tail gas during startup, shutdown and normal operations can be satisfied.

Classes IPC  ?

• B01D 53/18 - Unités d'absorptionDistributeurs de liquides

Abrégé

Provided are a Y/ZSM-5 composite molecular sieve, a preparation method therefor, and an FCC catalyst. The preparation method of the composite molecular sieve comprises: mixing a raw material Y molecular sieve having a silicon-aluminum ratio of 2 or greater with an acidic treatment agent containing acid, performing an acid pickling reaction, then mixing with an alkaline solution of a structure directing agent and crystallizing, to obtain the Y/ZSM-5 composite molecular sieve. The composite molecular sieve has two molecular sieve phases, the ratio of the two phases is adjustable, and the composite molecular sieve has high catalytic performance.

Classes IPC  ?

• B01J 29/80 - Mélanges de différentes zéolites
• B01J 37/00 - Procédés de préparation des catalyseurs, en généralProcédés d'activation des catalyseurs, en général
• C01B 39/04 - Zéolites aluminosilicates cristallinesLeurs composés isomorphesLeur préparation directeLeur préparation à partir d'un mélange réactionnel contenant une zéolite cristalline d'un autre type, ou à partir de réactants préformésLeur post-traitement utilisant au moins un agent structurant organique, p. ex. un composé d'ammonium quaternaire ionique ou un composé aminé
• C01B 39/24 - Type Y
• C01B 39/38 - Type ZSM-5
• C01B 39/40 - Type ZSM-5 utilisant au moins un agent structurant organique
• C10G 11/05 - Alumino-silicates cristallins, p. ex. tamis moléculaires

Abrégé

Provided are a Y/ZSM-5 composite molecular sieve and a preparation method therefor, and a catalytic cracking catalyst. The preparation method comprises: mixing a Y molecular sieve raw material containing a second Y molecular sieve with an alkaline solution of a structure directing agent and carrying out crystallization to obtain a Y/ZSM-5 composite molecular sieve. The method further comprises carrying out drying and compaction treatment before crystallization, and/or, the Y molecular sieve raw material contains a first Y molecular sieve. The composite molecular sieve has two molecular sieve phases and high catalytic performance.

Classes IPC  ?

• B01J 29/80 - Mélanges de différentes zéolites
• C01B 39/24 - Type Y
• C01B 39/38 - Type ZSM-5
• C10G 11/05 - Alumino-silicates cristallins, p. ex. tamis moléculaires

Abrégé

The present application discloses a method and apparatus for determining a scanning matrix. The method comprises: by means of performing excitation testing on simple harmonic waves having a same scanning length within a stable output frequency band range of a controllable seismic source, on the basis of a test result, determining a frequency band having the highest signal-to-noise ratio as an orthogonal design frequency band of a simple harmonic wave scanning signal; performing excitation testing on simple harmonic waves having different scanning lengths, determining similarities between observation values received by a sensor and a scanning signal and signal-to-noise ratios of the observation values, and selecting a scanning length corresponding to an observation value having the highest similarity with the scanning signal and the highest signal-to-noise ratio; on the basis of the orthogonal design frequency band and the scanning length of the simple harmonic wave scanning signal, determining a frequency range of the scanning signal; on the basis of a minimum number of orthogonal excitation signals, determining a minimum number of scanning signals; on the basis of the minimum number of the simple harmonic wave scanning signals, the frequency range, the orthogonal design frequency band, and the scanning length, precisely determining a scanning matrix, so as to improve the reliability of geological information extraction and ensure the authenticity of geological information.

Classes IPC  ?

• G01V 1/28 - Traitement des données sismiques, p. ex. pour l’interprétation ou pour la détection d’événements

Abrégé

The present invention relates to the field of corrosion prevention materials. Disclosed are anticorrosive oil and an anticorrosive material, and preparation methods therefor and the use thereof. The anticorrosive oil contains a monoalkoxy titanate, a dihydroxypropyl octadecanoate, an organosilicon defoaming agent, an antioxidant, modified nano silicon dioxide, nano titanium dioxide, graphene and aluminum tripolyphosphate, wherein the hydroxyl content of the modified nano silicon dioxide is 0.1-0.5/nm2, and the particle size of the modified nano silicon dioxide satisfies: calculated on the basis that the particle size interval width is 5 nm, the range of particle size having the maximum proportion is 10-15 nm, and the proportion thereof is 45-55 wt%. There are no gaps between the layers of an anticorrosive material formed by means of the anticorrosive oil of the present invention, and the anticorrosive material has good sealing and good corrosion resistance, impact resistance and ultraviolet aging resistance, and can provide long-acting corrosion prevention for ocean steel piles.

Classes IPC  ?

• C10M 163/00 - Compositions lubrifiantes caractérisées en ce que l'additif est un mélange d'un composé de constitution indéterminée ou incomplètement déterminée et d'un composé non macromoléculaire, chacun de ces composés étant un composé essentiel
• C09D 5/00 - Compositions de revêtement, p. ex. peintures, vernis ou vernis-laques, caractérisées par leur nature physique ou par les effets produitsApprêts en pâte

Abrégé

The patent application discloses a degradable downhole tool member for hydrocarbon resource recovery. The downhole tool member comprises a shaped body comprising a degradable polymer matrix, wherein the downhole tool member, when held in downhole fluid at about 80°C., has an initial mass loss about about 14% for a holding period of about 2 days in a pressure holding test.

Classes IPC  ?

• C08B 7/00 - Préparation d'esters cellulosiques d'acides organiques et inorganiques
• E21B 23/01 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour ancrer les outils ou similaires
• E21B 33/10 - Étanchement ou bouchage des trous de forage ou des puits dans le trou de forage
• C08B 3/06 - Acétate de cellulose
• E21B 34/06 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits

Abrégé

The patent application discloses a method for nondestructively determining information of an element disposed within a polymer body comprising a cure system extending continuously throughout. The method comprises the steps of directing x-rays onto a surface of the body, wherein the x-rays are directed through the body, and wherein target atoms in the cure system of the polymer body emit x-ray fluorescence; and receiving the x-ray fluorescence and determining composition information of the cure system within the body.

Classes IPC  ?

• G01N 23/223 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p. ex. rayons X ou neutrons, non couvertes par les groupes , ou en mesurant l'émission secondaire de matériaux en irradiant l'échantillon avec des rayons X ou des rayons gamma et en mesurant la fluorescence X

Abrégé

The patent application discloses a degradable downhole tool member for hydrocarbon resource recovery. The downhole tool member comprises a shaped body comprising a degradable polymer matrix, wherein the downhole tool member, when held in downhole fluid at about 80° C., has an initial mass loss about 14% for a holding period of about 2 days in a pressure holding test.

Classes IPC  ?

• E21B 33/13 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues
• C08L 67/04 - Polyesters dérivés des acides hydroxycarboxyliques, p. ex. lactones

Abrégé

The patent application discloses a method for nondestructively determining information of an element disposed within a polymer body comprising a cure system extending continuously throughout. The method comprises the steps of directing x-rays onto a surface of the body, wherein the x-rays are directed through the body, and wherein target atoms in the cure system of the polymer body emit x-ray fluorescence; and receiving the x-ray fluorescence and determining composition information of the cure system within the body.

Classes IPC  ?

• G01N 23/02 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p. ex. rayons X ou neutrons, non couvertes par les groupes , ou en transmettant la radiation à travers le matériau
• G01N 23/06 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p. ex. rayons X ou neutrons, non couvertes par les groupes , ou en transmettant la radiation à travers le matériau et mesurant l'absorption
• G01N 23/083 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p. ex. rayons X ou neutrons, non couvertes par les groupes , ou en transmettant la radiation à travers le matériau et mesurant l'absorption le rayonnement consistant en rayons X

Abrégé

A catalyst and a preparation method therefor, and a preparation method for 1,4-cyclohexanedimethanol. The catalyst comprises Pd, Co, and a carrier, wherein based on the total mass of the catalyst, the Pd content is 0.2-0.5 wt%, the Co content is 0.12-0.3 wt%, and the carrier content is 99.2-99.68 wt%. The carrier is a mixed oxide of Al, Si, and B, and the molar ratio of Al:Si:B is 3.4-4.2:1:0.2-0.3. The carbon monoxide poisoning resistance of the catalyst can be significantly improved while reducing the content of Pd and Co elements. In addition, the catalyst has the advantages of high DMT conversion rates and high DMCD selectivity.

Classes IPC  ?

• B01J 23/89 - Catalyseurs contenant des métaux, oxydes ou hydroxydes métalliques non prévus dans le groupe du cuivre ou des métaux du groupe du fer combinés à des métaux nobles
• B01J 23/83 - Catalyseurs contenant des métaux, oxydes ou hydroxydes métalliques non prévus dans le groupe du cuivre ou des métaux du groupe du fer en combinaison avec des métaux, oxydes ou hydroxydes prévus dans les groupes avec des terres rares ou des actinides
• C07C 31/27 - Alcools polyhydroxyliques contenant des cycles saturés

Abrégé

222 into methane can be overall improved by combining biotic factors with abiotic factors.

Classes IPC  ?

• E21B 43/22 - Emploi de produits chimiques ou à activité bactérienne
• C12P 5/02 - Préparation des hydrocarbures acycliques

Abrégé

22 cutoff values of adsorbed gas and free gas are redefined to accurately calculate an adsorbed gas content and a free gas content, such that the precision of calculation of the gas content of a reservoir can be improved.

Classes IPC  ?

• G01N 24/08 - Recherche ou analyse des matériaux par l'utilisation de la résonance magnétique nucléaire, de la résonance paramagnétique électronique ou d'autres effets de spin en utilisant la résonance magnétique nucléaire

Abrégé

123455 is selected from an alkyl having 1-20 carbon atoms; a, b, c and d represent the molar percentage content of a structural unit, a is 55-75%, b is 15-25%, c is 1-10%, and d is 0.1-5%; and n is selected from an integer of 5-10. The fracturing fluid containing the shearing-thickening copolymer has good high-temperature resistance.

Classes IPC  ?

• C08F 290/06 - Polymères prévus par la sous-classe
• C08F 220/56 - AcrylamideMéthacrylamide
• C09K 8/68 - Compositions à base d'eau ou de solvants polaires contenant des composés organiques

Abrégé

A method for improving DAS signal-to-noise ratio by means of local FK transform. The method includes: acquiring seismic wavefield data; segmenting the seismic wavefield data into a plurality of pieces of local data, wherein each piece of local data has the same dimension as the seismic wavefield data; processing each piece of local data by means of the following steps: performing FK transform to obtain an intermediate signal, removing some FK spectrum components from the intermediate signal according to scanning energy which corresponds to the intermediate signal under different apparent slowness, and performing two-dimensional inverse FFT on the intermediate signal, from which some FK spectrum components are removed; and combining all the processed local data, so as to obtain new seismic wavefield data.

Classes IPC  ?

• G01V 1/36 - Exécution de corrections statiques ou dynamiques sur des enregistrements, p. ex. correction de l'étalementÉtablissement d'une corrélation entre signaux sismiquesÉlimination des effets produits par un excès d'énergie
• G01V 1/32 - Transformation d'un mode d'enregistrement en un autre

Abrégé

A polymer microsphere profile control and water shutoff agent, a preparation method therefor and a use thereof. The preparation method comprises: polymerizing a Pickering emulsion, a polymer monomer A and a RAFT agent, and polymerizing an obtained product with a polymer monomer B, to obtain a single-side polymer modified nanosheet; removing a template carrier and reacting with an amino acid, to obtain a polymer microsphere profile control and water shutoff agent. The profile control and water shutoff agent is temperature-resistant and salt-resistant, is evenly distributed in a high permeability layer, has good profile control and water shutoff effects, and improves recovery rate.

Classes IPC  ?

• C08F 285/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères greffés préformés
• C08F 265/10 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères d'acides monocarboxyliques non saturés ou de leurs dérivés tels que définis dans le groupe sur des polymères d'amides ou d'imides
• C08F 257/02 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères de monomères aromatiques tels que définis dans le groupe sur des polymères de styrène ou de styrène substitué par des groupes alkyle

Abrégé

A bending and expansion experiment apparatus (100) for an expandable tubular, comprising a base (10), a support mechanism (20), and two clamping mechanisms (30), the two clamping mechanisms (30) being disposed at two ends of the base (10), respectively. Each clamping mechanism (30) is detachably connected to an end portion of the expandable tubular (200) and fixes the end portion of the expandable tubular (200). The support mechanism (20) comprises a plurality of support frames (21) disposed on the base (10), and the plurality of support frames (21) are sequentially disposed at intervals in the length direction of the base (10). Each support frame (21) is used for supporting the expandable tubular (200) and pushing the expandable tubular (200) to move up and down. The base (10) comprises a plurality of base modules (11), and the plurality of base modules (11) are sequentially arranged in the length direction of the base (10) and are detachably and fixedly connected. The bending and expansion experiment apparatus (100) for an expandable tubular can truly simulate the expansion process of the expandable tubular (200) in a curved well section having a large inclination.

Classes IPC  ?

• G01N 3/20 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts permanents de flexion
• G01N 3/12 - Test de pression

Abrégé

Disclosed are a slim-hole coiled tubing tractor and a crawling movement method. The tractor comprises: a first motion section (100), a control short section (300) and a second motion section (200) connected in sequence. The first motion section and the second motion section each comprise a motion mechanism. The motion mechanism comprises a body (1), a support mechanism (101) and at least two telescopic mechanisms (102). The telescopic mechanisms are connected to the body to drive the body to extend and retract, and the support mechanism and the at least two telescopic mechanisms are distributed in the extension direction of the body. The support mechanism comprises a support cylinder (30), a support connecting rod (6) and a locking arm (7). The support cylinder is mounted on the body. The locking arm has a hinged end and a free end. The hinged end, the support connecting rod and the support cylinder are hingedly connected in sequence. The free end is in slope fit with the outer wall of the support cylinder. The technical problem that the traction force and the expanding rate are difficult to meet requirements in a slim-hole drilling process is solved.

Classes IPC  ?

• E21B 23/08 - Introduction ou circulation d'outils par pression de fluide, p. ex. systèmes d'outils mis en place par un courant de fluide

Abrégé

22222 environment.

Classes IPC  ?

• C09K 8/467 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits contenant des liants inorganiques, p. ex. ciment Portland contenant des additifs pour des utilisations spécifiques
• C08G 12/12 - UréesThiourées
• C08F 220/18 - Esters des alcools ou des phénols monohydriques des phénols ou des alcools contenant plusieurs atomes de carbone avec l'acide acrylique ou l'acide méthacrylique
• B01J 13/02 - Fabrication de microcapsules ou de microbilles

Abrégé

A hardened slip and a method of making the hardened slip are disclosed. A method of hard surfacing a slip component for a downhole tool is disclosed. The slip component may have a bearing surface and may be composed of a base material, the base material being metallic. The method may comprise steps of positioning at least the bearing surface of the slip component with a direct contact with a boron source; bonding an external layer at least on the bearing surface to form a metallurgical bond between boron from the boron source with the base material by boriding the base material; and maintaining a bulk temperature of the slip component below a melting point of the base material.

Classes IPC  ?

• E21B 23/01 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour ancrer les outils ou similaires
• E21B 33/12 - PackersBouchons
• C25D 9/04 - Revêtement électrolytique autrement qu'avec des métaux avec des matières inorganiques
• E21B 33/129 - PackersBouchons à patins mécaniques pour accrochage dans le tubage

Abrégé

A method for depicting a fracture structure, comprising: acquiring raw waveform data corresponding to a target depth interval (101); performing singular value decomposition processing on the raw waveform data to obtain first waveform data, and, on the basis of a target singular value greater than a preset value, reconstructing the first waveform data to obtain second waveform data (102); performing denoising processing on the second waveform data to obtain target waveform data corresponding to the target depth interval (103); and, on the basis of the target waveform data, depicting a fracture structure (104). Detailed information is well preserved while complex noise interference is effectively removed, and local features and edge contours of the fracture structure outside a borehole are enhanced in imaging, so that the fracture structure outside the borehole is depicted more precisely. Further provided are an apparatus for depicting a fracture structure, a storage medium, and a processor.

Classes IPC  ?

• G01V 1/48 - Traitement des données
• G01V 1/30 - Analyse

Abrégé

An integrated sensor, comprising: a mounting framework (11), which has an internal accommodating space, wherein a gamma ray shielding layer (12) is arranged on the outer wall of one end of the mounting framework, and the gamma ray shielding layer (12) is provided with a measuring port (121); three acceleration sensors (13), which are sequentially arranged in the internal accommodating space and are used for measuring formation space gravity vectors in three directions perpendicular to one another; three magnetic sensors (14), which are sequentially arranged in the internal accommodating space and are used for measuring formation space magnetic field vectors in the three directions perpendicular to one another; and a gamma sensor (15), which is arranged in the internal accommodating space corresponding to the position where the gamma ray shielding layer (12) is located, and is used for measuring a formation gamma counting rate by means of the measuring port (121), wherein the gamma ray shielding layer (12) is made of tungsten-nickel-copper or tungsten-nickel-iron, and by taking the axial direction of the mounting framework (11) as a measuring direction, the distance between the magnetic sensors (14) and the gamma ray shielding layer (12) is greater than 40 cm. The present invention further comprises a logging system and a method for determining a formation drilling parameter.

Classes IPC  ?

• E21B 47/00 - Relevés dans les trous de forage ou dans les puits
• E21B 49/00 - Test pour déterminer la nature des parois des trous de forageEssais de couchesProcédés ou appareils pour prélever des échantillons du terrain ou de fluides en provenance des puits, spécialement adaptés au forage du sol ou aux puits
• G01V 5/12 - Prospection ou détection au moyen de rayonnement ionisant, p. ex. de la radioactivité naturelle ou provoquée spécialement adaptée au carottage en utilisant des sources de radiation nucléaire primaire ou des rayons X en utilisant des sources de rayons gamma ou de rayons X

Abrégé

A molten salt heating direct-flow type wet saturated steam generation system, comprising an evaporation device, a molten salt conveying device, a preheating device, a softened water conveying device, and a dryness adjustment device. The evaporation device is provided with a first heat exchange pipeline and a second heat exchange pipeline; the molten salt conveying device comprises a molten salt conveying apparatus and a molten salt recovery apparatus; the preheating device is provided with a first preheating pipeline, and an outlet of the second heat exchange pipeline is connected to a steam output pipeline; and the dryness adjustment device comprises an adjustment member and a dryness measurement apparatus. According to the steam generation system provided by the present invention, the temperature of softened water and the temperature of molten salt can be adjusted to appropriate ranges, avoiding the crystallization of the molten salt; moreover, the dryness of wet saturated steam can be controlled by means of coarse adjustment and fine adjustment, and the direct-flow type evaporation device is suitable for softened water having poor quality so as to meet the steam injection requirements of oil fields.

Classes IPC  ?

• F22B 1/06 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un corps fonduEmploi de métal fondu, p. ex. du zinc, comme milieu transmetteur de chaleur
• F22B 35/10 - Systèmes de commande pour chaudières à vapeur pour chaudières à vapeur du type à circulation forcée du type à circulation ouverte
• F22B 37/38 - Détermination ou signalisation des conditions de marche dans les chaudières à vapeur, p. ex. enregistrant la direction ou le débit du courant d'eau dans les tubes
• F22B 37/44 - Utilisation, agencement ou disposition des dispositifs d'alarme ou des dispositifs automatiques de sécurité des vannes de sécurité
• F22D 1/32 - Appareils de chauffage d'eau d'alimentation, p. ex. préchauffeurs disposés pour un chauffage par la vapeur, p. ex. prélevée dans la turbine
• F22G 1/00 - Surchauffe de la vapeur caractérisée par la méthode de chauffage
• F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou

Abrégé

Provided are a method for evaluating reservoir scaling during water flooding, and an application and device thereof. The method comprises: acquiring the ion concentration, cumulative distribution of solid phase particle size counts, and core permeability before displacement; acquiring the multipoint pressure and core permeability of a core, cumulative distribution of solid phase particle size counts, and ion concentration during and/or after the displacement; acquiring ion concentration change, the minimum retained particle size within the core, scaling location, and the degree of core damage; completing evaluation of reservoir scaling during water flooding.

Classes IPC  ?

• E21B 43/00 - Procédés ou dispositifs pour l'extraction de pétrole, de gaz, d'eau ou de matériaux solubles ou fusibles ou d'une suspension de matières minérales à partir de puits
• G01N 15/00 - Recherche de caractéristiques de particulesRecherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux