Abrégé

Disclosed are a polymer, a tackifier, a preparation method therefor and a drilling fluid. The polymer contains a structural unit represented by a formula (1), a structural unit represented by a formula (2) and a structural unit represented by a formula (3), wherein R1, R2, R3, R4, R5, R6, R7 and R8 are each independently hydrogen or C1 to C10 linear or branched alkyl; X is C1 to C10 linear or branched alkylene; Y is a formula (4) or C1 to C10 linear or branched alkylene; and M is hydrogen or an alkali metal, and A1, A2 and A3 are each independently a bond or C1 to C3 linear or branched alkylene. The polymer can still maintain excellent viscosity-increasing performance in a high-temperature and high-calcium environment.

Classes IPC  ?

• C08F 220/56 - AcrylamideMéthacrylamide
• C08F 220/28 - Esters contenant de l'oxygène en plus de l'oxygène de la fonction carboxyle ne contenant pas de cycles aromatiques dans la partie alcool
• C08F 220/34 - Esters contenant de l'azote
• C08F 220/38 - Esters contenant du soufre
• C09K 8/035 - Additifs organiques
• C09K 8/12 - Compositions ne contenant pas d'argile contenant des composés organiques synthétiques macromoléculaires ou leurs précurseurs

Abrégé

A turbine type pulse generator for downhole drilling tool has a pulse generating device (2), which has a turbine housing (21), a turbine shaft (22) concentrically arranged inside the turbine housing (21), a turbine mechanism arranged around the turbine shaft (22), and a valve disc mechanism provided at a lower end of the turbine shaft (22). The turbine mechanism is configured to drive the turbine shaft (22) to rotate under an impact of drilling fluid, so that a flow area of the valve disc mechanism is changed periodically to generate pressure pulses. The turbine type pulse generator also has an automatic control mechanism (1) configured to keep the turbine shaft (22) static relative to the turbine housing (21) in a circumferential direction during composite drilling, and to drive the turbine shaft (22) to rotate relative to the turbine housing (21) under an impact of the turbine mechanism during sliding drilling.

Classes IPC  ?

• E21B 7/24 - Forage utilisant des moyens vibrants ou oscillants, p. ex. des masses déséquilibrées

Abrégé

The present disclosure relates to the technical field of drilling, in particular to a composite material, a composition, a drilling fluid, and a method for plugging formation well wall fractures. The composite material includes a polymer matrix and metal ions embedded in the polymer matrix, an embedding rate of the metal ions is not less than 90 wt %, and turbidity of an aqueous solution of the composite material is not less than 1000 NTU under a condition of pH≤8. The composite material can actively and quickly identify a change in a formation environment based on a difference in pH values between the drilling fluid and the formation environment, and achieve a precise response and precise matching with a formation well wall fracture environment, and a small amount of composite material can effectively increase a plugging rate of the formation well wall fracture.

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
• C04B 26/10 - Composés macromoléculaires obtenus autrement que par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone
• C04B 26/28 - Polysaccharides ou leurs dérivés
• C09K 8/44 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits contenant uniquement des liants organiques

Abrégé

A polymer, a thickening agent, and a preparation method therefor are provided. The polymer contains structural units of formula (1), formula (2), of formula (3), and of formula (4). The thickening agent contains the polymer and has instant solubility. It can be used for thickening slickwater, a glue solution, a cross-linked fracturing fluid and an acid solution having different viscosities, which improves compatibility between different fracturing fluids. Various fracturing fluid systems prepared by using the thickening agent have good temperature resistance, shearing resistance, sand-carrying performance, and a slow speed.

Classes IPC  ?

• C08F 234/00 - Copolymères de composés cycliques ne contenant pas de radicaux aliphatiques non saturés dans une chaîne latérale et contenant une ou plusieurs liaisons doubles carbone-carbone dans un hétérocycle
• C09K 8/68 - Compositions à base d'eau ou de solvants polaires contenant des composés organiques

Abrégé

A geopolymer material, and a preparation method therefor and the use thereof are provided. The geopolymer material contains modified siallite. On the basis of the total amount of the modified siallite and in terms of oxide, the aluminum content in the modified siallite is 35 weight % or more, and the silicon content is 40 weight % or more. The initial setting time of the geopolymer material is at least one temperature in the range of 70-300° C. is 5-10 hours, and the final setting time is 7-12 hours. The geopolymer material has an appropriate initial setting time and final setting time when activated by an activator, and can achieve well cementation at a higher temperature even when a retarder is not used in cooperation.

Classes IPC  ?

• C09K 8/46 - 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
• C04B 14/04 - Matières riches en siliceSilicates
• C04B 22/06 - OxydesHydroxydes
• C04B 22/16 - Acides ou leurs sels comportant du phosphore dans la partie anionique, p. ex. phosphates
• 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
• C04B 40/00 - Procédés, en général, pour influencer ou modifier les propriétés des compositions pour mortiers, béton ou pierre artificielle, p. ex. leur aptitude à prendre ou à durcir
• C04B 103/10 - Accélérateurs
• E21B 33/13 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues

Abrégé

A liner hanger system, a liner hanger and a using method thereof. The liner hanger comprises: a liner hanger unit (3) comprising a setting mechanism (31); and a feeding tool (1) for feeding the liner hanger unit (3) downhole, comprising a setting driving unit (11), a hydraulic release unit (12) and an intelligent hydraulic control system (13). The intelligent hydraulic control system (13) comprises a machine core assembly (131), a circuit unit (132) and a hydraulic assembly (133), wherein the machine core assembly (131) is configured to receive a signal transmitted from a wellhead and transmit same to the circuit unit (132), so as to identify a setting instruction and/or a release instruction and send same to the hydraulic assembly (133); and the hydraulic assembly (133) is configured to output high-pressure oil to the setting driving unit (11) according to the setting instruction, so as to drive the setting mechanism to implement a setting action, and/or to output high-pressure oil to the hydraulic release unit (12) according to the release instruction, so as to implement a release action.

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 23/04 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage mis en œuvre à l'aide de moyens fluides, p. ex. actionnés par explosion
• E21B 23/10 - Outils spécialement adaptés à cet effet

Abrégé

An oil-gas well, a well cementation method, and a cement composition are provided. The oil-gas well has a well body, a sleeve disposed in the well body, and a cement slurry cured product disposed between the well body and the sleeve. Due to the strength and toughness of the cement slurry cured product, at least part of the sleeve is a non-metal sleeve. By selecting specific cement, the cured product of cement has excellent mechanical strength and toughness, and is mated with the non-metal sleeve to achieve well cementation.

Classes IPC  ?

• E21B 33/14 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues pour la cimentation des tubes dans les trous de forage ou de sondage
• C04B 20/00 - Emploi de matières comme charges pour mortiers, béton ou pierre artificielle prévu dans plus d'un groupe et caractérisées par la forme ou la répartition des grainsTraitement de matières spécialement adapté pour renforcer leur propriétés de charge dans les mortiers, béton ou pierre artificielle prévu dans plus d'un groupe de Matières expansées ou défibrillées
• C04B 103/30 - Réducteurs d'eau, plastifiants, entraîneurs d'air
• C04B 111/90 - Propriétés électriques
• 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 drilling tool face measuring apparatus (100), the drilling tool face measuring apparatus being used to connect a drill bit (6), and comprising: an outer cylinder (10), configured to rotate synchronously with the drill bit (6); a coding disk (11), fixedly disposed in the outer cylinder (10) and provided with multiple coding holes (111) axially penetrating through the coding disk (11) and arranged in a circumferential direction; a valve block (12), capable of rotating coaxially relative to the coding disk (11), and opening and closing different coding holes (111) of the multiple coding holes (111) at various rotational positions relative to the coding disk (11); and a weight sensor (2), rotatably disposed in the outer cylinder (10) and connected to the valve block (12), a center of gravity of the weight sensor (2) not coinciding with the axis of rotation of the valve block (12). The weight sensor (2) may drive the valve block (12) to rotate synchronously around the axis of rotation of the valve block (12), so that the weight sensor (2) causes the valve block (12) to maintain an orientation relative to the axis of rotation of the valve block (12) under the action of gravity. A method for measuring a tool angle of a drilling tool using the drilling tool face measuring apparatus (100). This configuration solves the problem of a measurement-while-drilling tool failing to operate normally under high-temperature conditions encountered in deep well and ultra-deep well drilling, and geothermal resource development.

Classes IPC  ?

• E21B 47/024 - Détermination de l'inclinaison ou de la direction des dispositifs dans le trou de forage

Abrégé

6 23 6 23 23 alkyl side chain, the three have a specific molar ratio, and the polymer has a specific degree of cross-linking, such that the polymer has high oil and gas absorption rate, and good heat resistance, durability and mechanical properties. When the polymer is used in a cement slurry, a cement slurry having uniform dispersion and stable performance can be obtained. After the cement slurry is cured, the formed cement stone has an elastic modulus that is greatly reduced compared with that of a conventional cement stone, the flexural strength of the hardened cement stone is improved, the gas permeability of the cement stone is reduced and the hardened cement stone has a self-repairing performance when encountering oil and gas, and therefore the long-term sealing performance of the cement sheath is ensured.

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
• C08F 210/14 - Monomères contenant au moins cinq atomes de carbone
• C08F 212/08 - Styrène
• C08F 212/36 - Divinylbenzène
• C08F 220/56 - AcrylamideMéthacrylamide

Abrégé

The present invention relates to the technical field of drilling engineering, and in particular to a liner hanger. The liner hanger comprises an outer pipe assembly, an inner pipe, and a torque transmission assembly. The torque transmission assembly comprises a torque rod fixedly provided on the outer wall of the inner pipe, a torque block fixedly provided on the inner wall of a first outer pipe, and a transmission nut and a back-off nut which are in axial sliding fit with the torque rod; and the outer rings of the transmission nut and the back-off nut are respectively connected to the first outer pipe and a second outer pipe by means of threads. The thread direction between the back-off nut and the second outer pipe is opposite to the thread direction between the transmission nut and the first outer pipe. The inner pipe is configured to rotate forward, so as to drive the back-off nut to move upward so as to be separated from the second outer pipe. According to the present invention, releasing can be completed before fixation, and after releasing, the well cementation quality can still be improved by means of rotation operation.

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

Abrégé

An automatic retrieving device (200, 15), for use in retrieving a well logging data memory (13) released into a well from a vibrating screen (250). The automatic retrieving device (200, 15) comprises: an image acquisition module (220) provided at the vibrating screen (250) and configured to acquire an image of a screen surface of the vibrating screen (250); a capture module (230) provided at an outlet of the vibrating screen (250) and configured to capture the identified well logging data memory (13); and a controller (210) coupled to the image acquisition module (220) and the capture module (230) and configured to: in response to a received release signal, start the image acquisition module (220) to acquire the image of the screen surface of the vibrating screen (250), the release signal indicating that the well logging data memory (13) is released into a well; receive the image from the image acquisition module (220); identify whether the well logging data memory (13) is present in the image; and in response to the well logging data memory (13) being present in the image, start the capture module (230) to capture the identified well logging data memory (13) from the vibrating screen (250).

Classes IPC  ?

• E21B 47/12 - 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
• E21B 47/11 - Localisation des fuites, intrusions ou mouvements du fluide utilisant des traceursLocalisation des fuites, intrusions ou mouvements du fluide utilisant la radioactivité
• E21B 47/26 - Stockage des données en fond de puits, p. ex. dans une mémoire ou sur un support d'enregistrement

Abrégé

A plugging agent composition and a use thereof, and a hydrocarbon reservoir plugging method. The plugging agent composition comprises a polymer latex and a stabilizer, wherein the stabilizer has a cross-linkable group and/or a couplable group; the cross-linkable group and/or the couplable group in the stabilizer are/is cross-linked or coupled in the presence of a crack and/or a leakage point, so that the polymer latex is condensed and cured. The plugging agent composition is a smart pressure-sensitive lost circulation material, which can address leaks promptly as the leaks occur and does not work unless there is a leak; and compared with an existing latex-demulsified lost circulation material, there is no need to use metal cations for demulsification, and the plugging agent composition can penetrate into cracks for plugging, and can plug cracks of different sizes from nanometers to millimeters; thus, the plugging effect is excellent, and the use requirements in the field of hydrocarbon reservoir plugging can be well met.

Classes IPC  ?

• 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
• C08F 230/08 - Copolymères de composés contenant un ou plusieurs radicaux aliphatiques non saturés, chaque radical ne contenant qu'une seule liaison double carbone-carbone et contenant du phosphore, du sélénium, du tellure ou un métal contenant un métal contenant du silicium
• C08F 220/56 - AcrylamideMéthacrylamide
• C08F 283/06 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères prévus par la sous-classe sur des polyéthers, des polyoxyméthylènes ou des polyacétals
• C08F 220/06 - Acide acryliqueAcide méthacryliqueLeurs sels métalliques ou leurs sels d'ammonium
• C09K 8/44 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits contenant uniquement des liants organiques

Abrégé

The present invention relates to the field of oil drilling. Disclosed are a lost-circulation composition, a lost-circulation material and a use thereof. The lost-circulation composition can be cross-linked to form a gel before or during being injected into the formation, and the gel can be cured at the lost-circulation formation to form a lost-circulation material, wherein the mass retention rate of the gel when scouring at 50-180℃ for 30 min at a water flow rate of 10 m/min is 90% or more; and the lap anti-shear strength of the lost-circulation material is 0.1-0.14 MPa. The lost-circulation composition of the present invention is suitable for a water-bearing formation having a temperature of not higher than 180℃, especially a flowing water-bearing formation. According to the present invention, the lost-circulation composition can be cross-linked to form a gel, and after being injected into the water-containing formation, the gel can realize strong retention around a wellbore, and can be cured under formation conditions to form a lost-circulation material, which finally blocks the lost-circulation formation. The lost-circulation material of the present invention has remarkable improvements in water dilution resistance, interfacial bonding strength, high temperature resistance and the like.

Classes IPC  ?

• C09K 8/44 - Compositions de cimentation, p. ex. pour la cimentation des tubes dans les trous de forageCompositions de bouchage, p. ex. pour tuer des puits contenant uniquement des liants organiques
• 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
• 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
• C09K 8/512 - Composés macromoléculaires contenant des agents de réticulation
• C09K 8/514 - Composés macromoléculaires d'origine naturelle, p. ex. polysaccharides, cellulose

Abrégé

A packer, comprising: a central tube (1), an outer surface thereof being provided with a first prefabricated groove (11); a rubber cylinder unit (2), comprising a rubber cylinder assembly (21), an upper rubber cylinder seat (22) and a lower rubber cylinder seat (23), wherein the inner wall of the upper rubber cylinder seat is provided with a clamping groove (221); an upper anchoring unit (3) and a lower anchoring unit (4) which are located at two ends of the rubber cylinder unit, the upper anchoring unit comprising an upper cone (31) and an upper slip (32), and the lower anchoring unit comprising a lower cone (41) and a lower slip (42); and an unsealing mechanism (5), comprising a connecting sleeve (51), the connecting sleeve having disposed thereon a through groove (511), and having an unsealing block (52) mounted in the through groove; the unsealing block being constructed so as to be matched with the clamping groove on a radial outer side when in an initial state, so as to axially secure the upper rubber cylinder seat to the upper cone, and via an upward lifting action of the central tube, allowing the upper rubber cylinder seat to axially move relative to the upper cone, causing the rubber cylinder unit to become unsealed; and the lower cone and the upper cone being configured to be capable of respectively moving up and down by means of upward lifting movement and downward pressing movement of the central pipe, in order to respectively cause the unclamping of the lower anchoring unit and upper anchoring unit. Additionally disclosed is an unsealing method of the packer.

Classes IPC  ?

• E21B 33/128 - PackersBouchons avec un organe dilaté radialement par pression axiale
• E21B 33/129 - PackersBouchons à patins mécaniques pour accrochage dans le tubage
• E21B 33/1295 - PackersBouchons à patins mécaniques pour accrochage dans le tubage actionnés par pression de fluide

Abrégé

The present invention provides a mechanics-electronics-hydraulics integrated directional tool for continuous tubing drilling. The directional tool comprises an electronic control module; and a hydraulic driving module, wherein the hydraulic driving module comprises an electric motor in signal connection with the electronic control module, an oil bag unit arranged between the electronic control module and the electric motor, a bidirectional hydraulic pump connected to the electric motor, and a piston unit, which compensates for hydraulic oil to balance a difference between internal and external pressures of the hydraulic driving module stored in the oil bag unit, the piston unit comprising a piston housing and a piston, and a first liquid cavity and a second liquid cavity in communication with the bidirectional hydraulic pump being formed at two ends of the piston; and a mechanical transmission module, which has two ends respectively connected to the piston and a downhole drilling tool, wherein the electronic control module can transmit a ground control command to the hydraulic driving module to control the electric motor to drive the bidirectional pump to alternately provide high-pressure oil and low-pressure oil in the first liquid cavity and the second liquid cavity, such that the piston moves in a reciprocating manner in an axial direction, and the mechanical driving module can convert the axial motion of the piston into rotation to drive the downhole drilling tool to rotate, so as to adjust the downhole drilling tool.

Classes IPC  ?

• E21B 7/04 - Forage dirigé

Abrégé

A downhole blowout preventer has a blowout preventer tubing string containing a circulation unit, a packer unit and a pressure-building unit connected in sequence from top to bottom. The pressure-building unit is configured to be activated in response to a command, so as to build up pressure in a space inside the blowout preventer tubing string. The packer unit is configured to be activated when a pressure in said space reaches a first predetermined value, so as to seal an annulus between said blowout preventer tubing string and an external casing or borehole. The circulation unit is configured to be activated when the pressure in said space reaches a second predetermined value, thereby creating a circulation path between an interior and an exterior of the blowout preventer tubing string. The first predetermined value is less than the second predetermined value.

Classes IPC  ?

• E21B 33/06 - Obturateurs anti-éruption
• E21B 23/04 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage mis en œuvre à l'aide de moyens fluides, p. ex. actionnés par explosion

Abrégé

A polymer having a dispersing function, a preparation method therefor and use thereof as a cement dispersant are provided. The polymer has a structural unit (a), a structural unit (b) and a structural unit (c). The structural unit (a) is provided by an unsaturated polyether, the structural unit (b) is provided by an unsaturated acid and/or a salt thereof and/or an anhydride thereof, and the structural unit (c) is provided by a silane and/or siloxane having a polymerizable group and no less than five carbon atoms. The molar ratio of the structural unit (a), the structural unit (b) and the structural unit (c) is 1:(1-20):(0.01-0.5); and the polymer has a weight average molecular weight of 20,000-90,000 g/mol.

Classes IPC  ?

• C08F 290/14 - Polymères prévus par la sous-classe
• C04B 24/42 - Composés comportant au moins une liaison carbone-silicium
• 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 state self-adaptive turbine type pulse generator (100), comprising: a pulse generating apparatus (2), comprising a turbine housing (21), a turbine shaft (22) concentrically arranged inside the turbine housing (21), a turbine mechanism sleeved on the turbine shaft (22), and a valve disc mechanism disposed at a lower end of the turbine shaft (22), the turbine mechanism being capable of driving the turbine shaft (22) to rotate under the action of a drilling fluid, so that an overflow area of the valve disc mechanism undergoes periodic changes to generate a pressure pulse; and an automatic control mechanism (1), configured to control the status of the pulse generating device (2), the automatic control mechanism (1) being configured to be able to cause the turbine shaft (22) to be stationary in a circumferential direction relative to the turbine casing (21) during hybrid drilling, so that the pulse generating apparatus (2) is in a non-working state, and to enable the turbine shaft (22) to rotate relative to the turbine casing (21) under the action of the turbine mechanism during slide drilling, so that the pulse generating apparatus (2) is in a working state.

Classes IPC  ?

• E21B 7/24 - Forage utilisant des moyens vibrants ou oscillants, p. ex. des masses déséquilibrées

Abrégé

The present invention relates to a turbine type pulse generator for downhole drilling tool, which comprises a pulse generating device (2), comprising a turbine housing (21), a turbine shaft (22) concentrically arranged inside the turbine housing (21), a turbine mechanism arranged around the turbine shaft (22), and a valve disc mechanism provided at a lower end of the turbine shaft (22). The turbine mechanism is configured to drive the turbine shaft (22) to rotate under an impact of drilling fluid, so that a flow area of the valve disc mechanism is changed periodically to generate pressure pulses. The turbine type pulse generator further comprises an automatic control mechanism (1) configured to control a state of the pulse generating device (2). The automatic control mechanism (1) is configured to keep the turbine shaft (22) static relative to the turbine housing (21) in a circumferential direction during composite drilling, so that the pulse generating device (2) is in a non-working state, and to drive the turbine shaft (22) to rotate relative to the turbine housing (21) under an impact of the turbine mechanism during sliding drilling, so that the pulse generating device (2) is in a working state.

Classes IPC  ?

• E21B 7/24 - Forage utilisant des moyens vibrants ou oscillants, p. ex. des masses déséquilibrées

Abrégé

A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.

Classes IPC  ?

• E21B 33/14 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues pour la cimentation des tubes dans les trous de forage ou de sondage
• E21B 33/12 - PackersBouchons
• E21B 33/126 - PackersBouchons à cuvette ou jupe élastiques actionnées par pression d'un fluide
• E21B 34/14 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par le mouvement des outils, p. ex. obturateurs à manchons actionnés par des pistons ou par des outils à câble
• E21B 33/127 - PackersBouchons à manchon gonflable
• E21B 33/13 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues

Abrégé

The present invention relates to the technical field of drilling, and relates to a composite material, a composition, a drilling fluid, and a method for plugging formation well wall fractures. The composite material comprises a polymer matrix and metal ions embedded in the polymer matrix, the embedding rate of the metal ions not being less than 90wt%. An aqueous solution of the composite material has a turbidity of not less than 1000NTU under at a pH≤8. The composite material can, on the basis of the difference in pH values between a drilling fluid and a formation environment, actively and quickly identify changes in the formation environment, and achieves accurate response to and accurate matching with formation well wall fracture environment. In addition, a small amount of composite material can effectively improve the plugging rate of formation well wall fractures.

Classes IPC  ?

• C09K 8/508 - Composés macromoléculaires
• C09K 8/514 - Composés macromoléculaires d'origine naturelle, p. ex. polysaccharides, cellulose
• C09K 8/88 - Composés macromoléculaires
• C09K 8/90 - Composés macromoléculaires d'origine naturelle, p. ex. polysaccharides, cellulose

Abrégé

123456781233 are each independently a bond or a C1-C3 linear or branched alkylene group. The polymer may still maintain an excellent viscosity-increasing performance in a high-temperature and high-calcium environment.

Classes IPC  ?

• C08F 220/56 - AcrylamideMéthacrylamide
• C08F 220/34 - Esters contenant de l'azote
• C08F 218/16 - Esters d'acides polycarboxyliques avec des alcools contenant au moins trois atomes de carbone
• C09K 8/588 - 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 polymères spécifiques
• C08L 33/00 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et un seul étant terminé par un seul radical carboxyle, ou ses sels, anhydrides, esters, amides, imides ou nitrilesCompositions contenant des dérivés de tels polymères

Abrégé

Provided in the present invention are a geopolymer material, and a preparation method therefor and the use thereof. The geopolymer material contains modified siallite. On the basis of the total amount of the modified siallite and in terms of oxide, the aluminum content in the modified siallite is 35 weight% or more, and the silicon content is 40 weight% or more. The initial setting time of the geopolymer material in at least one temperature in the range of 70-300°C is 5-10 hours, and the final setting time is 7-12 hours. The geopolymer material of the present invention has an appropriate initial setting time and final setting time under the activation of an activator, and can achieve well cementation at a higher temperature even when a retarder is not used in cooperation.

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 8/46 - 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

Abrégé

Provided in the present invention are a geopolymer material, and a preparation method therefor and the use thereof. The geopolymer material contains modified siallite. On the basis of the total amount of the modified siallite and in terms of oxide, the aluminum content in the modified siallite is 35 weight% or more, and the silicon content is 40 weight% or more. The initial setting time of the geopolymer material in at least one temperature in the range of 70-300°C is 5-10 hours, and the final setting time is 7-12 hours. The geopolymer material of the present invention has an appropriate initial setting time and final setting time under the activation of an activator, and can achieve well cementation at a higher temperature even when a retarder is not used in cooperation.

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 8/46 - 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

Abrégé

The present invention relates to the technical field of oil exploration, and in particular, to an oil-gas well, a well cementation method, and a cement composition. The oil-gas well comprises a well body, a sleeve disposed in the well body, and a cement slurry cured product disposed between the well body and the sleeve, wherein due to the strength and toughness of the cement slurry cured product, at least part of the sleeve is a non-metal sleeve. By selecting specific cement, the cured product of cement has excellent mechanical strength and toughness, and is mated with the non-metal sleeve to achieve well cementation, so that the use of a metal sleeve can be reduced, and the cost of well cementation is greatly reduced.

Classes IPC  ?

• E21B 33/14 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues pour la cimentation des tubes dans les trous de forage ou de sondage
• E21B 43/10 - Mise en place de tubages, filtres ou crépines dans les puits
• C04B 28/04 - Ciments Portland
• C04B 24/40 - Composés contenant du silicium, du titane ou du zirconium

Abrégé

12345678910111213141515 are each independently hydrogen or a straight or branched C1-C10 alkyl group; X is a straight or branched C1-C10 alkylene group; and M is hydrogen or an alkali metal. The thickening agent of the present invention has instant solubility and can be used for thickening slickwater, a glue solution, a cross-linked fracturing fluid, and an acid solution having different viscosities, such that the integration of the thickening agent is achieved and the problem of poor compatibility between different fracturing fluids is solved. Various fracturing fluid systems prepared by using the thickening agent have good temperature resistance, shearing resistance, sand-carrying performance, and a slow speed.

Classes IPC  ?

• C08F 220/56 - AcrylamideMéthacrylamide
• C08F 220/06 - Acide acryliqueAcide méthacryliqueLeurs sels métalliques ou leurs sels d'ammonium
• C08F 220/58 - Amides contenant de l'oxygène en plus de l'oxygène de la fonction carbonamide
• 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
• C08F 220/30 - Esters contenant de l'oxygène en plus de l'oxygène de la fonction carboxyle contenant des cycles aromatiques dans la partie alcool
• C09K 8/68 - Compositions à base d'eau ou de solvants polaires contenant des composés organiques

Abrégé

A drilling tool has an upstream drilling string, a downstream drilling bit, and a percussive device connected between the upstream drilling string and the downstream drilling bit. In a first state, the upstream drilling string is generated with elastic compression by the percussive device, and in a second state, the upstream drilling string releases the elastic compression to apply impacts on the downstream drilling bit through the percussive device. The drilling tool has a prolonged service life and can effectively reduce the drilling cost.

Classes IPC  ?

• E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans
• E21B 4/06 - Moyens de percussion mis en œuvre au fond du trou, p. ex. marteaux
• E21B 4/10 - Moyens de percussion mis en œuvre au fond du trou, p. ex. marteaux le mouvement de rotation continu dans une seule direction de l'arbre ou des tiges de forage produisant des chocs consécutifs
• G06F 30/17 - Conception mécanique paramétrique ou variationnelle

Abrégé

A speed-enhancing drilling tool includes an upstream drill string (10), which has a drive motor and a first driving rod coupled therewith, a downstream drilling bit; and a percussive device connected between the upstream drilling string and the downstream drilling bit. The first driving rod extending axially and the drive motor are configured to drive the first driving rod in rotation. The percussive device has a rotary driving part having an upper end engaged with the first driving rod to rotate together therewith; and a rotary working part having an upper end engaged with a lower end of the rotary driving part and a lower end connected with the downstream drilling bit. The rotary working part can be driven by the rotary driving part to rotate about its axis, and axially movable relative thereto; and a percussion generating part arranged around the rotary working part.

Classes IPC  ?

• E21B 4/10 - Moyens de percussion mis en œuvre au fond du trou, p. ex. marteaux le mouvement de rotation continu dans une seule direction de l'arbre ou des tiges de forage produisant des chocs consécutifs
• E21B 4/14 - Marteaux commandés par fluide

Abrégé

A drilling speed-enhancing device has an outer cylinder a rotary main shaft arranged in an inner chamber of the outer cylinder and configured to rotate around its own axis; an output main shaft arranged below the rotary main shaft and configured to be driven by the rotary main shaft to rotate around its own axis, a lower end of the output main shaft extending out of the inner chamber of the outer cylinder for connecting with a drilling bit of a dual-drive drilling tool; and a percussion generator arranged between the output main shaft and the outer cylinder. The percussion generator can drive the outer cylinder and the rotary main shaft to move upward relative to the output main shaft, so that under action of WOB, the rotary main shaft and the outer cylinder move downward to generate impact on the output main shaft.

Classes IPC  ?

• E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans

Abrégé

A drilling tool includes an outer cylinder; a power rotary shaft arranged in an inner chamber of the outer cylinder; a percussion generator arranged below the power rotary shaft, having a transmission shaft extending in the outer cylinder and can be driven by the power rotary shaft to rotate around its axis, an output main shaft engaged with a lower end of the transmission shaft so as to be driven by the transmission shaft to rotate about its axis and is movable relative to the transmission shaft along an axial direction, and an percussion assembly The percussion assembly is arranged between an annulus formed between the upper end of the output main shaft and the outer cylinder and can generate reciprocating impact along the axial direction on the output main shaft. A drilling bit connected with the output main shaft extending out of the inner chamber of the outer cylinder.

Classes IPC  ?

• E21B 4/14 - Marteaux commandés par fluide
• E21B 4/10 - Moyens de percussion mis en œuvre au fond du trou, p. ex. marteaux le mouvement de rotation continu dans une seule direction de l'arbre ou des tiges de forage produisant des chocs consécutifs
• E21B 4/00 - Moyens d'entraînement dans le trou de forage

Abrégé

The present invention relates to a dendritic polymer, and a preparation method therefor and an application thereof. The dendritic polymer contains a dendritic polyester as a core, and a plurality of arms obtained by means of polymerization of an alkenyl monomer; the radius of gyration of the dendritic polymer does not exceed 100 nm; and the alkenyl monomer contains a non-ionic monomer and an anionic monomer. According to the dendritic polymer of the present invention, the dendritic polyester is used as the core, the polymeric segments formed by a monomer generally used for synthesizing a filtrate loss reducer are used as the arms, and the dendritic polymer is obtained by means of free radical polymerization; and compared with a linear polymer, in the case that the molecular weight is identical, the dendritic polymer of the present invention has a smaller root-mean-square radius of gyration, and is more compact in structure, so that the dendritic polymer is used in a drilling fluid, has a stronger filtrate loss reduction function, has a blocking performance, and also has better temperature resistance and salt resistance.

Classes IPC  ?

• C08G 63/06 - Polyesters dérivés soit d'acides hydroxycarboxyliques, soit d'acides polycarboxyliques et de composés polyhydroxylés dérivés des acides hydroxycarboxyliques
• C08G 63/685 - Polyesters contenant des atomes autres que le carbone, l'hydrogène et l'oxygène contenant de l'azote
• C08G 63/91 - Polymères modifiés par post-traitement chimique
• C09K 8/56 - Compositions pour consolider le sable meuble ou similaire autour des puits sans diminuer excessivement sa perméabilité

Abrégé

The present invention relates to a dendritic polymer, and a preparation method therefor and an application thereof. The dendritic polymer contains a dendritic polyester as a core, and a plurality of arms obtained by means of polymerization of an alkenyl monomer; the radius of gyration of the dendritic polymer does not exceed 100 nm; and the alkenyl monomer contains a non-ionic monomer and an anionic monomer. According to the dendritic polymer of the present invention, the dendritic polyester is used as the core, the polymeric segments formed by a monomer generally used for synthesizing a filtrate loss reducer are used as the arms, and the dendritic polymer is obtained by means of free radical polymerization; and compared with a linear polymer, in the case that the molecular weight is identical, the dendritic polymer of the present invention has a smaller root-mean-square radius of gyration, and is more compact in structure, so that the dendritic polymer is used in a drilling fluid, has a stronger filtrate loss reduction function, has a blocking performance, and also has better temperature resistance and salt resistance.

Classes IPC  ?

• C08G 63/06 - Polyesters dérivés soit d'acides hydroxycarboxyliques, soit d'acides polycarboxyliques et de composés polyhydroxylés dérivés des acides hydroxycarboxyliques
• C08G 63/685 - Polyesters contenant des atomes autres que le carbone, l'hydrogène et l'oxygène contenant de l'azote
• C08G 63/91 - Polymères modifiés par post-traitement chimique
• C09K 8/56 - Compositions pour consolider le sable meuble ou similaire autour des puits sans diminuer excessivement sa perméabilité

Abrégé

A downhole blowout preventer and a blowout prevention operation method using same. The downhole blowout preventer (100) comprises a blowout preventer string (110) comprising a circulation unit (1), a packer unit (2), and a pressure unit (5) connected in sequence from top to bottom, wherein the pressure unit is configured to be started in response to an instruction, so that the space inside the blowout preventer string is pressed; the packer unit is configured to be started when the pressure within the space reaches a first predetermined value, thereby sealing an annulus between the blowout preventer string and an outer sleeve or wellbore; the circulation unit is configured to be started when the pressure within the space reaches a second predetermined value, thereby establishing a circulation channel between the interior and the exterior of the blowout preventer string, wherein the first predetermined value is less than the second predetermined value.

Classes IPC  ?

• E21B 33/122 - Packers à brins multiples

Abrégé

The present invention provides a polymer having a dispersing function, a preparation method therefor and use thereof as a cement dispersant. The polymer comprises a structural unit a, a structural unit b and a structural unit c; the structural unit a is provided by an unsaturated polyether, the structural unit b is provided by an unsaturated acid and/or a salt thereof and/or an anhydride thereof, and the structural unit c is provided by a silane and/or siloxane comprising a polymerizable group and having no less than five carbon atoms; the molar ratio of the structural unit a, the structural unit b and the structural unit c is 1: (1-20): (0.01-0.5); and the polymer has a weight average molecular weight of 20000-90000. Compared with the prior art, the polymer and the dispersant provided by the present invention can significantly reduce the retarding property of polycarboxylic acid, especially completely do not have the retarding property at a high temperature of higher than 120°C, while maintaining a higher dispersibility when a higher amount of acid is used. In addition, the dispersant provided by the present invention is compatible with other additional additives.

Classes IPC  ?

• C04B 24/32 - Polyéthers, p. ex. polyéther de glycol et d'alkylphénol
• C08F 2/38 - Polymérisation utilisant des régulateurs, p. ex. des agents d'arrêt de chaîne
• C08F 4/40 - Systèmes redox
• C08F 220/06 - Acide acryliqueAcide méthacryliqueLeurs sels métalliques ou leurs sels d'ammonium
• C08F 222/02 - AcidesLeurs sels métalliques ou leurs sels d'ammonium
• C08F 230/08 - Copolymères de composés contenant un ou plusieurs radicaux aliphatiques non saturés, chaque radical ne contenant qu'une seule liaison double carbone-carbone et contenant du phosphore, du sélénium, du tellure ou un métal contenant un métal contenant du silicium
• C08F 283/06 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères prévus par la sous-classe sur des polyéthers, des polyoxyméthylènes ou des polyacétals

Abrégé

The present invention provides a polymer having a dispersing function, a preparation method therefor, and a use thereof as a cement dispersant. The polymer comprises a structural unit a, a structural unit b, a structural unit c and a structural unit d, wherein the structural unit a is provided by an unsaturated polyether and/or polyester, the structural unit b is provided by an unsaturated carboxylic acid or an anhydride or salt thereof, the structural unit c is provided by a silane and/or siloxane containing a polymerizable group, and the structural unit d is provided by an unsaturated sulfonic acid or a salt thereof. The molar ratio of the structural unit a to the structural unit d is 1:(5-15), preferably 1:(6-10), and the polymer has a weight average molecular weight of 20,000 to 120,000. The polymer of the present invention is used as an oil well cement dispersant; in use, the dispersant can not only solve the fluidity of cement slurry, but also improve the sedimentation stability of the slurry; in addition to good compatibility with additives, the dispersant also has good compatibility with and good dispersibility for additive materials such as micro-silicon and latex; the dispersant is suitable for use in medium- and low-temperature well cementing projects, and greatly meets the actual requirements for oil well cement dispersants.

Classes IPC  ?

• C04B 24/16 - Composés contenant du soufre
• C08F 283/06 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères prévus par la sous-classe sur des polyéthers, des polyoxyméthylènes ou des polyacétals
• 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

Disclosed is a staged cementing device (10), comprising a cylindrical body (100) having an inner cavity (110), wherein a circulation hole (120) and a liquid inlet hole (130) opening towards the inner cavity are provided in a wall of the body; an opening assembly (300) arranged in the body and comprising an opening sleeve (310) and an opening seat (320) arranged in the opening sleeve (310), wherein in an initial state, the opening sleeve (310) is connected to the body (100) by means of a first shear pin (180) and covers the circulation hole (120), and the opening seat (320) is connected to the opening sleeve (310) by means of a second shear pin (182) and covers the liquid inlet hole (130); and a packer (200), comprising a packing valve body (210) and a rubber barrel (220), the packing valve body (210) comprising a flow channel (230) in communication with the liquid inlet hole (130), and the rubber barrel (220) comprising a liquid containing cavity (240) in communication with the flow channel (230). The second shear pin (182) is configured to be sheared off in response to pressure build-up in the inner cavity of the body (100) after first-stage well cementation is finished, such that the opening seat (320) moves downstream to open the liquid inlet hole (130). Therefore, expansion liquid entering the inner cavity of the body (100) during a first-stage well cementation can enter the liquid containing cavity (240) through the liquid inlet hole (130) and the flow channel (230), such that the rubber sleeve (220) is expanded for the first time.

Classes IPC  ?

• E21B 33/14 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues pour la cimentation des tubes dans les trous de forage ou de sondage

Abrégé

A drilling speed increasing device (100), comprising: an outer barrel (1); a rotating spindle (4) provided in an inner cavity of the outer barrel and capable of rotating about its axis; an output spindle (7) provided at the lower end of the rotating spindle and capable of rotating about its axis under the drive of the rotating spindle, a lower end of the output spindle extending out of the inner cavity of the outer barrel to connect a drill bit of a dual-drive drilling tool; and an impact generator provided between the output spindle and the outer barrel and capable of driving the outer barrel and the rotating spindle to move upward with respect to the output spindle, and under the action of drilling pressure, making the rotating spindle and the outer barrel move downward to produce an impact on the output spindle. The drilling speed increasing device enables the drilling tool to generate impact on the formation while rotary drilling of the formation, and the drilling efficiency is high.

Classes IPC  ?

• E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans

Abrégé

Disclosed is a well drilling acceleration tool (1), comprising: an upstream drilling tool (10), the upstream drilling tool comprising a drive motor and a first drive rod (15) jointed to the drive motor, wherein the first drive rod extends axially, and the drive motor is configured to drive the first drive rod to rotate; a downstream drill bit; and an impactor (20) connected between the upstream drilling tool and the downstream drill bit. The impactor comprises a rotary drive part configured to be capable of rotating around an axis thereof, the upper end of the rotary drive part being jointed to the first drive rod and being capable of rotating along with the first drive rod; a rotary working part, the upper end thereof being jointed to the lower end of the rotary drive part, the lower end thereof being connected to the downstream drill bit, and the rotary working part being capable of being driven by the rotary drive part to rotate around the axis of the rotary working part and being capable of moving axially relative to the rotary drive part; and an impact generation part sleeved outside the rotary working part, wherein the upper end of the impact generation part abuts against an elastic member, and the impact generation part can move axially relative to the rotary working part so as to axially impact the rotary working part downwards under the action of the elastic member.

Classes IPC  ?

• E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans

Abrégé

A drilling tool, comprising an outer cylinder (1); a power rotary shaft (13), provided in an inner cavity of the outer cylinder (1), the power rotary shaft (13) being able to be driven to rotate around the axis thereof; an impact generator, provided below the power rotary shaft (13), the impact generator having a transmission shaft (20) extending in the outer cylinder (1) and configured to be combined with the power rotary shaft (13) so as to rotate around the axis thereof under the driving of the power rotary shaft (13), an output spindle (22) having an upper end engaged with a lower end of the transmission shaft (20) so as to be drivable by the transmission shaft (20) to rotate around the axis thereof and being able to move axially relative to the transmission shaft (20), and an impact assembly provided in an annular space formed by the upper end of the output spindle (22) and the outer cylinder (1) and configured to produce axial reciprocating impacts on the output spindle (22); and a drill bit, the drill bit being able to be connected to a lower end of the output spindle (22) extending out of the inner cavity of the outer cylinder (1). The drilling tool can generate impacts on a formation while rotary drilling is performed on the formation, and the drilling efficiency is high.

Classes IPC  ?

• E21B 3/035 - Moyens d'entraînement de surface pour forage par rotation à transmission par glissement ou élastique
• E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans
• E21B 17/07 - Joints télescopiques permettant de faire varier les longueurs de trains de tigesAmortisseurs

Abrégé

A well drilling tool and a method for determining a parameter thereof. The well drilling tool (1) comprises an upstream drilling tool (10), a downstream drilling bit, and an impactor (30); the impactor (30) is connected between the upstream drilling tool (10) and the downstream drilling bit; under a first state, the impactor (30) makes the upstream drilling tool (10) generate elastic compression; under a second state, the upstream drilling tool (10) is released from the elastic compression so as to apply impact to the downstream drilling bit by means of the impactor (30). The well drilling tool is long in service life, and can effectively reduce the well drilling cost.

Classes IPC  ?

• E21B 3/035 - Moyens d'entraînement de surface pour forage par rotation à transmission par glissement ou élastique
• E21B 4/16 - Moyens d'entraînement multiples au fond du trou, p. ex. pour le forage combiné par percussion et par rotationMoyens d'entraînement pour unités de forage à plusieurs trépans
• E21B 17/07 - Joints télescopiques permettant de faire varier les longueurs de trains de tigesAmortisseurs