In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.
The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, in which at least a portion of the end (1; 2) is coated with at least one film of polyurethane (12), 100% solid state, with an essentially rigid structure, based on a matrix of polyurethane and polyurea, in which the urethane functionality is predominant with respect to the urea functionality in a proportion of at least 55% by weight.
C10M 107/44 - Composés macromoléculaires obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone
C09D 175/00 - Compositions de revêtement à base de polyurées ou de polyuréthanesCompositions de revêtement à base de dérivés de tels polymères
E21B 17/042 - AccouplementsJoints entre tige et trépan, ou entre tiges filetés
F16L 15/00 - Raccords avec filetageFormes des filetages pour ces raccords
C10N 30/06 - OnctuositéRésistance du filmAnti-usureRésistance aux pressions extrêmes
3.
THREADED CONNECTION FOR DRILLING AND WORKING HYDROCARBON WELLS
The invention concerns a threaded connection comprising a first and a second tubular component, each being provided with a respective male (1) and female (2) end, the male end (1) comprising at least one threaded zone (3) on its external peripheral surface and ending in a terminal surface (7), the female end (2) comprising at least one threaded zone (4) on its internal peripheral surface and ending in a terminal surface (8), the threaded zones (3; 4) comprising, over at least a portion of their length, threads (32, 42) each comprising, viewed in longitudinal section passing through the axis of the tubular component, a thread crest (36, 46), a thread root (35, 45), a load flank (30; 40) and a stabbing flank (31; 41), characterized in that the profiles of the male and female load flanks (30; 40), viewed in longitudinal section passing through the axis of revolution (10) of the connection, are a continuous curve with a convex or concave form, the profile of the male flanks being complementary to that of the female flanks over at least 70%, preferably 90% of said continuous curve.
The invention concerns a device for inspecting a threading (fc) of a tubular component for the exploration or working of hydrocarbon wells, the device comprising a threaded support (14) which can cooperate by makeup with the threading (fc) of the tubular component, means (12, fs) for blocking the advance of the threaded support (14) during makeup with the threading (fc) of the tubular component, a longitudinal rail (2) fixed to the means (12, fs) for blocking the advance of the threaded support (14) and extending in a direction belonging to a plane passing through the axis of the threading of the treaded support (14), means (9) for inspecting the treading of the tubular component (fc), and means (4) for longitudinal guidance in order to guide the means (9) for inspecting the treading in translation along the longitudinal rail (2). The invention also concerns methods using the device.
G01B 3/40 - Calibres à mâchoire ouverte et faces opposées, c.-à-d. compas à calibrer, où la distance interne entre les faces est fixe, mais peut être réglée à l'avance pour pas de vis extérieurs
G01B 3/48 - Calibres à tampon pour les dimensions intérieures avec des surfaces de contact dont l'écartement est fixe, mais peut être réglé à l'avance pour filetage intérieur
E21B 19/16 - Branchement ou débranchement des accouplements de tubes ou de joints
5.
PROCESS FOR COATING A THREADED TUBULAR COMPONENT, THREADED TUBULAR COMPONENT AND RESULTING CONNECTION
The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, in which at least a portion of the end (1; 2) is coated with at least one lubricating dry film (12) comprising at least 65% by weight of a polyaryletherketone. The invention also concerns a process for depositing said film (12).
A lubricating coating which can prevent the occurrence of galling even when makeup is carried out with a high torque and which has excellent rust preventing properties is formed on the contact surfaces of a pin and/or a box of a tubular threaded joint. The lubricating coating contains copolymer particles made from particles of an acrylic-silicone copolymer with an average particle diameter of 10 - 50 μm dispersed in a highly viscous matrix made from a mixture of a rosin-based substance selected from rosin and its derivatives, wax, a metal soap, and a basic metal salt of an aromatic organic acid (such as highly basic Ca sulfonate).
C10M 107/28 - Composés macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone contenant des monomères comportant un radical insaturé lié à un radical carboxyle, p. ex. acrylate
C10M 107/38 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé macromoléculaire contenant des halogènes
C10M 107/50 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé macromoléculaire contenant du silicium
C10M 109/00 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé de constitution indéterminée ou incomplètement déterminée
In order to provide a tubular threaded joint constituted by a pin and a box each having threads and an unthreaded metal contact portion with excellent galling resistance and gas tightness even in extremely cold environments at -60° C to -20° C and rust preventing properties without using a compound grease, a thermoplastic solid lubricating coating containing low friction copolymer particles made from an acrylic-silicone copolymer and preferably further containing a solid lubricant (e.g., graphite) in a thermoplastic polymer matrix (e.g., selected from polyolefin resins and ethylene-vinyl acetate copolymer resins) is formed on the surface of the threads and unthreaded metal contact portion of a pin and/or a box.
C10M 107/02 - Polymères d'hydrocarburesPolymères d'hydrocarbures modifiés par oxydation
C10M 107/24 - Composés macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone contenant des monomères comportant un radical insaturé lié à un radical alcool, aldéhyde, cétone, éther, cétal ou acétal
C10M 107/28 - Composés macromoléculaires obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone contenant des monomères comportant un radical insaturé lié à un radical carboxyle, p. ex. acrylate
C10M 107/50 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé macromoléculaire contenant du silicium
C10M 143/00 - Compositions lubrifiantes caractérisées en ce que l'additif est un hydrocarbure macromoléculaire ou un tel hydrocarbure modifié par oxydation
C10M 145/08 - Esters vinyliques d'un acide carboxylique saturé ou de l'acide carbonique
C10M 147/02 - Monomère contenant uniquement du carbone, de l'hydrogène et des halogènes
The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, characterized in that at least a portion of the end (1; 2) is coated with a lubricating dry film (12) the matrix (13) of which comprises at least one migrating sliding agent (9) belonging to the oils or waxes family and principally distributed at the surface of the lubricating dry film (12) such that the coefficient of friction of the film (12) is less than 0.07 at loads of less than 40 N while the coefficient of friction of the film (12) is more than 0.1 at loads of more than 200 N.
A coating apparatus for forming a thin UV curable resin coating on the outer and/or inner surface(11A,11B) of a threaded end portion of a steel pipe(11) constituting a pin or box of a threaded joint for steel pipes comprises a steel pipe(11) support means(14) which supports the steel pipe(11) while rotating it about its longitudinal axis, a first spraying unit(1) having at least two nozzles(1a,1b) adapted to spray a UV curable resin coating composition by pneumatic atomization toward the outer or inner surface(11A,11B) of the threaded end portion of a steel pipe(11), a UV curable resin supply system for supplying the UV curable resin coating composition from a storage tank(21) to each nozzle(1a,1b) of the first spraying unit(1), and a first nozzle support means(3,5,7,9,15) which supports each nozzle(1a,1b) of the first spraying unit(1) so as to be movable in the axial direction of the steel pipe(11) and in the vertical direction. The two nozzles (1a,1b) are disposed at different positions at least in the axial direction of the steel pipe(11) at angles which are sloped such that the sprayed streams from the nozzles(1a,1b) approach each other. By using this coating apparatus, it is possible to form a UV cured resin coating on the outer or inner surface of a threaded end portion of a steel pipe with a uniform thickness.
B05B 13/02 - Moyens pour supporter l'ouvrageDisposition ou assemblage des têtes de pulvérisationAdaptation ou disposition des moyens pour entraîner des pièces
B05B 12/12 - Aménagements de commande de la distributionAménagements de réglage de l’aire de pulvérisation sensibles à l'état du liquide ou d'un autre matériau fluide expulsé, du milieu ambiant ou de la cible sensibles à l'état du milieu ambiant ou de la cible, p. ex. à l'humidité, à la température
B05B 13/06 - Machines ou installations pour appliquer des liquides ou d'autres matériaux fluides sur des surfaces d'objets ou de matériaux par pulvérisation, non couverts par les groupes conçus spécialement pour traiter l'intérieur de corps creux
B05C 9/12 - Appareillages ou installations pour appliquer des liquides ou d'autres matériaux fluides aux surfaces par des moyens non prévus dans l'un des groupes , ou dans lesquels le moyen pour déposer le liquide ou autre matériau fluide n'est pas important pour appliquer un liquide ou autre matériau fluide et exécuter une opération auxiliaire l'opération auxiliaire étant exécutée après l'application
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
A threaded tubular connection including a first tube and a second tube is provided. The first tube includes a pin member which extends from an end of a main body of the first tube to a terminal end of the first tube. The second tube includes a box member which extends from an end of a main body of the second tube to a terminal end of the second tube. A cross-sectional area of a pin critical cross-section is within approximately ± 5% of cross- sectional area of a box critical cross-section of the box member. The cross-sectional areas of each of the pin and box critical cross-sections are within approximately ± 5% of the sum of the cross-sectional areas of a box intermediate critical cross-section of the box member and a pin intermediate critical cross-section of the pin member.
The invention concerns a device (9) for inspecting the width of the thread roots (3; 4) of a tubular component for the exploration or working of hydrocarbon wells, comprising two arms (91, 92) each provided with a first (912, 922) and a second (910, 920) end, the first ends (912, 922) being connected together by means of a deformable portion (95) allowing an angular displacement (e) between the second ends (910, 920), the second ends (910, 920) each carrying a contact element (930, 940) and the inspection device further comprising means (90) for determining the angular displacement (e). The invention also concerns a method for inspecting said threading.
G01B 3/48 - Calibres à tampon pour les dimensions intérieures avec des surfaces de contact dont l'écartement est fixe, mais peut être réglé à l'avance pour filetage intérieur
A female component (1) for a tubular hydrocarbon working string subjected to dynamic bending strength comprising a tapered female threading (3) intended to cooperate with a male threading in order to form a rigid mutual connection of tubular elements, a free end and a female sealing surface (15) being disposed between the free end and the female threading, the female sealing surface (15) being provided in order to come into contact in the made up condition with a male sealing surface in order to form a metal-metal seal, and an annular groove (31) provided between the free end and the female sealing surface (15), leaving an axial distance greater than zero between the free end and a transition region outwardly of the female sealing surface, and a radial distance greater than zero between the female sealing surface and a chamfer at the free end, the groove (31) comprising a border formed by the chamfer and a border formed by a portion of the transition region, in order to protect the female sealing surface prior to makeup.
Steel containing, by weight: 0.3 to 0.5% C; 0.1 to 1% Si; 1% Mn or less; 0.03% P or less; 0.005% S or less; 0.3 to 1% Cr; 1 to 2% Mo; 0.3 to 1% W; 0.03 to 0.25% V; 0.01 to 0.15% Nb; 0.01 to 0.1% Al, the balance of the chemical composition of the steel consisting of Fe and impurities or residuals resulting from or as a necessary consequence of the smelting and casting processes carried out on the steel. The steel serves for manufacturing weldless pipes for hydrocarbon wells, the yield strength of the steel after heat treatment being equal to or greater than 862 MPa, or even equal to or greater than 965 MPa.
A threaded end (1; 2) of a tubular component for drilling or working hydrocarbon wells, said end comprising a threaded zone (3; 4) produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, at least a portion of the end (1; 2) being coated with a dry film comprising an organic matrix in which ion exchange pigments are dispersed in proportions in the range 3% to 30% by weight; and a connection resulting from connecting two corresponding ends by makeup.
C10N 30/06 - OnctuositéRésistance du filmAnti-usureRésistance aux pressions extrêmes
C23F 11/08 - Inhibition de la corrosion de matériaux métalliques par application d'inhibiteurs sur la surface menacée par la corrosion ou par addition d'inhibiteurs à l'agent corrosif dans d'autres liquides
F16L 15/00 - Raccords avec filetageFormes des filetages pour ces raccords
F16L 57/00 - Protection des tuyaux ou d'objets de forme similaire contre les dommages ou les usures internes ou externes
F16L 58/04 - Revêtements caractérisés par les matériaux utilisés
15.
EXPANSIBLE THREADED JOINT AND METHOD FOR MAKING SAME
The invention relates to an expansible threaded joint including: a first tubular component comprising a male end (1) including a first and second threaded area (21, 22) and an insertion region (23) provided with a first annular tab (41) including a protruding abutment surface (41a) and with a first cavity; a second tubular member comprising a female end (2) including third and fourth threaded areas (23, 24) and an insertion region (26) provided with a second annular tab (42) including a protruding abutment surface (42a) and with a second cavity (44); wherein the first and second tabs (41, 42) are respectively engaged into the second and first cavities (44, 43) in the screwed state, the abutment surface of at least one tab is in contact with at least one cavity, the male end (1) includes a first surface (47) between the first threaded area and the first tab and the female end includes a second surface (48) between the third threaded area and the second cavity, said first and second surfaces (47, 48) defining, in the screwed state, an annular gap including an area having a large radial dimension (49) and an area having a small radial dimension (50) capable of forming a seal after expansion by metal-metal contact (60), with the first tab (41) engaging with the second tab (42).
A set for obtaining a threaded connection used in hydrocarbon wells, comprising a first tubular component provided with two threaded zones with identical lead, a second tubular component provided with at least two threaded zones, a third tubular component provided on its internal circumferential surface with at least one threaded zone and provided on its external circumferential surface with at least one threaded zone, the set being such that the threaded zone provided on the internal circumferential surface of the third component is capable of cooperating by makeup with one of the two threaded zones of the first component; the threaded zone provided on the external circumferential surface of the third component is capable of cooperating by makeup with one of the two threaded zones of the second component; the second and third components further comprise means for defining the end of makeup of said threaded zones; the other threaded zone provided on the end of the first component is capable of cooperating by makeup with the other threaded zone provided on the second component. A makeup method for obtaining a connection and a method for breaking out said connection.
A galling-resistant threaded tubular component for drilling or operating hydrocarbon wells is described, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, at least a portion of the end (1; 2) being coated with a dry film comprising a fluorourethane matrix. A process for coating said component.
The invention concerns an assembly for producing a threaded connection, comprising a first and a second tubular component with an axis of revolution (4), each being provided at one of its ends (1; 3) with a male threaded zone (10; 30) produced on the external circumferential surface, said ends (1; 3) each finishing in a terminal surface (15; 35) comprising means (14; 34) together forming a direct drive dog clutch device in order to fix the first and second tubular components in rotation, and comprising a third tubular component which also has an axis of revolution (4) and is provided at each of its ends (2, 2') on its internal circumferential surface with two female threaded zones (20, 20'), one of the two male threaded zones (10; 30) being capable of co-operating on makeup with one of the two female threaded zones (20, 20') while the other male threaded zone can co-operate on makeup with the other female threaded zone, characterized in that the male end (1) of the first tubular component as well as the corresponding female end (2) of the third tubular component comprises means for free rotation (11, 21) such that at the end of makeup of said male threaded zone (10) into said female threaded zone (20), the tubular components carrying said male and female threaded zones are freely rotational with res ect to each other.
A threaded connection (1) used in the exploration and operation of hydrocarbon wells comprises a first and a second tubular component, the first component comprising a male end (3) comprising a threaded zone (5) disposed on its external peripheral surface, the second component comprising a female end (2) comprising a threaded zone (4) disposed on its internal peripheral surface, the threaded zone (5) of the male end being threaded up into the threaded zone (4) of the female end, the threaded zones comprising respective male and female threads (40, 50), the threads (40, 50) comprising a root, a crest, a stabbing flank and a load flank, a groove being provided in the load flank of the threaded zone (40) of the female end and/or the male end respectively, adjacent to the root, and a boss being provided which projects axially from the load flank of the threaded zone (50) of the male end and/or respectively from the female end adjacent to the crest, the boss comprising a convex surface and a concave surface, the boss being housed in the groove with, in the connected state, a radial clearance subsisting between the concave surface and the groove and an axial clearance subsisting between the end of the boss and the bottom of the groove.
A threaded connection 1 comprising a first and a second tubular component, the first component comprising a male end comprising a distal surface and a threaded zone 5 disposed on its external peripheral surface, the second component comprising a female end comprising a distal surface and a threaded zone 4 disposed on its internal peripheral surface, the threaded zone 5 of the male end being threaded up into the threaded zone 4 of the female end, the threaded zones 4, 5 comprising respective male and female threads 40, 50 having a width which increases from the distal surface, the threads comprising load flanks having negative angles over at least a portion of their radial dimension, and stabbing flanks, with a radial clearance subsisting in the connected state between the crests of the male threads and the roots of the female threads and/or between the crests of the female threads and the roots of the male threads, with an axial clearance subsisting in the connected state between the stabbing flanks of the male and female threads, and the distal surface of the male end and/or female end being brought into axial abutting contact against a corresponding abutment surface.
A galling-resistant threaded tubular component for drilling or operating hydrocarbon wells has at one of its ends (1; 2) a threaded zone (3; 4) produced on its external or internal peripheral surface depending on whether the threaded end is male or female in type, with at least one portion of the threaded zone (3; 4) being coated with a dry film with a crystalline structure with a high specific surface area principally constituted by one or more mineral salts which are not reactive towards metals. It also concerns a process for coating such a component using a dry mineral film with a crystalline structure having a high specific surface area principally constituted by one or more mineral salts which are not reactive towards metals.
A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.
The invention concerns a set for manufacturing a threaded connection, comprising a first and a second tubular component with an axis of revolution (10), one of their ends (1, 2) being provided with a threaded zone (3; 4) formed on the external or internal peripheral surface of the component depending on whether the threaded end is of the male or female type, said ends (1, 2) finishing in a terminal surface (7, 8), said threaded zones (3; 4) comprising, over at least a portion, threads (32, 42) comprising, viewed in longitudinal section passing through the axis of revolution (10) of the tubular components, a thread crest (35, 45), a thread root (36, 46), a load flank (30; 40) and a stabbing flank (31; 41), the width of the thread crests (35, 45) of each tubular component reducing in the direction of the terminal surface (7; 8) of the tubular component under consideration, while the width of the thread roots (36, 46) increases, the profiles of the load flanks and/or the stabbing flanks of the male and female threaded zones, viewed in longitudinal section passing through the axis of revolution (10) of the tubular components, each having at least one identical portion (E, E') such that the male and female threads can be fitted one into the other over said identical portions (E, E') when the first and second tubular components are made up one into the other, characterized in that the identical portions (E, E') of the male and female ends (1, 2) are radially offset with respect to each other.
The invention concerns a set for producing a threaded connection, comprising a first and a second tubular component with an axis of revolution (10), one of their ends (1, 2) being provided with a threaded zone (3; 4) formed on the external or internal peripheral surface of the component depending on whether the threaded end is of the male or female type, said ends (1, 2) finishing in a terminal surface (7, 8) which is orientated radially with respect to the axis of revolution (10) of the tubular components, said threaded zones (3; 4) comprising threads (32; 42) comprising, viewed in longitudinal section passing through the axis of revolution (10) of the tubular components, a thread crest (35, 45), a thread root (36, 46), a load flank (30; 40) and a stabbing flank (31; 41), the width of the thread crests (35, 45) of each tubular component reducing in the direction of the terminal surface (7; 8) of the tubular component under consideration, while the width of the thread roots (36, 46) increases, characterized in that the lead of the male stabbing flanks and/or load flanks is different from the lead of the female stabbing flanks and/or load flanks. The invention also pertains to a threaded connection.
The invention concerns a tubular component for a threaded connection, having at one of its ends (1; 2) a threaded zone (3; 4) formed on its external or internal peripheral surface depending on whether the threaded end is of the male or female type, said end (1; 2) finishing in a terminal surface (7; 8), said threaded zone (3; 4) having, over at least a portion, threads (32; 42) comprising, when viewed in longitudinal section passing through the axis of the tubular component, a thread crest (35), a thread root (36), a load flank (30, 40), a stabbing flank (32, 42), the width of the thread crests (35) reducing in the direction of the terminal surface (7, 8) while the width of the thread roots (36) increases, characterized in that the profile of the load flanks (30; 40) and/or the stabbing flanks (32; 42), viewed in longitudinal section passing through the axis (10) of the tubular component, has as a central portion a continuous curve (34) provided with a point of inflection (I), said profile being convex at the thread crest and concave at the thread root. The invention also concerns a threaded connection.
A lubricant applying device (1) is provided with: a steel pipe support device (2) for rotating and supporting a steel pipe (P); a circulation system (3) for circulating a lubricant (9) adjusted to sprayable viscosity; a fixed amount supply device (4a) provided with a fixed-rate pump for supplying a fixed amount of the lubricant (9); a lubricant spray device (5a) having spray guns (19, 20) for spraying the lubricant from nozzles (19a, 20a); a spray gun support device (6) for supporting the spray guns (19, 20) in such a manner that the spray guns can move in the axial direction and/or the radial direction of the steel pipe (P); and a control unit (7) for controlling both the rotational speed of the steel pipe (P) rotated by the steel pipe support device (2) and the movement speed of the spray guns (19, 20) moved by the spray gun support device (6).
B05B 13/04 - Moyens pour supporter l'ouvrageDisposition ou assemblage des têtes de pulvérisationAdaptation ou disposition des moyens pour entraîner des pièces les têtes de pulvérisation étant déplacées au cours de l'opération
B05B 13/06 - Machines ou installations pour appliquer des liquides ou d'autres matériaux fluides sur des surfaces d'objets ou de matériaux par pulvérisation, non couverts par les groupes conçus spécialement pour traiter l'intérieur de corps creux
B05D 7/24 - Procédés, autres que le flocage, spécialement adaptés pour appliquer des liquides ou d'autres matériaux fluides, à des surfaces particulières, ou pour appliquer des liquides ou d'autres matériaux fluides particuliers pour appliquer des liquides ou d'autres matériaux fluides particuliers
F16L 15/00 - Raccords avec filetageFormes des filetages pour ces raccords
A solid lubricating coating formed on a contact surface of a threaded joint for pipes has a matrix of a lubricating oil-containing polymer. The lubricating oil-containing polymer has either a uniform composition or a gradient composition in which the concentration of lubricating oil decreases towards the contact surface and in which there is substantially no lubricating oil in the vicinity of the contact surface.
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
C23C 22/07 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6 contenant des phosphates
C23C 22/46 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6 contenant des oxalates
C23C 26/00 - Revêtements non prévus par les groupes
28.
LOW ALLOY STEEL WITH A HIGH YIELD STRENGTH AND HIGH SULPHIDE STRESS CRACKING RESISTANCE
A steel contains, by weight: C: 0.3% to 0.5%, Si: 0.1% to 0.5%, Mn: 0.1% to 1%, P: 0.03% or less, S: 0.005% or less, Cr: 0.3% to 1.5%, Mo: 1.0% to 1.5%, Al: 0.01% to 0.1%, V: 0.03% to 0.06%, Nb: 0.04% to 0.15%, Ti: 0 to 0.015%, N: 0.01% or less, the remainder of the chemical composition of the steel being constituted by Fe and impurities or residuals resulting from or necessary to steel production and casting processes. The steel enables to produce seamless tubes with a yield strength after heat treatment of 862 MPa or more which are particularly SSC-resistant.
The invention concerns a sealed threaded connection comprising a first and a second tubular component, each being provided with a respective male end (1) and female end (2), the male end (1) comprising, on its outer peripheral surface, at least one threaded zone (3), and at least one sealing surface (5,11) and finishing in a terminal surface (7) which is orientated transversely to the axis (10) of the connection, the female end (2) comprising, on its inner peripheral surface, at least one threaded zone (4) cooperating with the threaded zone (3) of the male end (1) by make up, the threaded zones (3, 4) being inclined in accordance with a conical generatrix (20) forming an angle of taper alpha; with the axis (10) of the connection, at least one sealing surface (6, 12) being positioned so as to cooperate with the at least one sealing surface (5, 11) of the male end (1) along a radially interfering contact zone, and finishing in a terminal surface (8) which is transversely orientated with respect to the axis (10) of the connection, the tangent at the contact zone of the sealing surface (5, 6; 11, 12) being inclined along a line (30) forming an angle beta; with the axis (10) of the threaded connection, characterized in that the inclination defined by the conical generatrix (20) relative to the threaded zones (3, 4) is in a direction opposite to the inclination defined by the tangent (30) at the contact zone of the sealing surface (5, 6; 11, 12).
The invention concerns a threaded connection comprising a first and a second tubular component, each being provided with a respective male (1) and female (2) end, the male end (1) comprising, on its external peripheral surface, at least one threaded zone (3) and finishing in a terminal surface (7) which is orientated radially with respect to the axis (10) of the connection, the female end (2) comprising, on its internal peripheral surface, at least one threaded zone (4) and finishing in a terminal surface (8) which is orientated radially with respect to the axis (10) of the connection, the male threaded zone (3) having a first portion in which the width of the teeth, CWTp, increases from a value CWTpmin corresponding to the width of the tooth which is closest to the terminal surface (7) of the male end (1) to a value CWTpmax corresponding to the width of the tooth which is furthest from said terminal surface (7), while the width of the teeth CWTb of the female threaded zone (4) decreases from a value CWTbmax corresponding to the width of the tooth which is furthest from the terminal surface (8) of the female end (2) to a value CWTbmin corresponding to the width of the tooth which is closest to said terminal surface (8), such that the threaded zones (3, 4) cooperate in accordance with self-locking make-up, characterized in that:CWTpmin/CWTbmax ≥ 0.2 and CWTbmin/CWTpmax ≤ CWTpmin/CWTbmax
A steel contains, by weight: C: 0.2% to 0.5%, Si: 0.1% to 0.5%, Mn: 0.1% to 1%, P: 0.03% or less, S: 0.005% or less, Cr: 0.3% to 1.5%, Mo: 0.3% to 1%, Al: 0.01% to 0.1%, V: 0.1% to 0.5%, Nb: 0.01% to 0.05%, Ti: 0 to 0.01%, W: 0.3% to 1%, N: 0.01% or less, the remainder of the chemical composition of the steel being constituted by Fe and impurities or residuals resulting from or necessary to steel production and casting processes. The steel can be used to produce seamless tubes with a yield strength after heat treatment of 861 MPa or more.
The invention concerns a threaded connection (1) comprising a first and a second tubular component, the first component comprising a male end (3) provided on its outer peripheral surface with, in succession, a threaded zone (5), a sealing surface (13) then a terminal surface (15) finishing in an abutment surface (7) which is orientated radially with respect to the axis of revolution (20) of the connection (1), the second component comprising a female end (2) provided on its inner peripheral surface with, in succession, a threaded zone (4), a sealing surface (12) then a recess (10) finishing in an abutment surface (8) which is orientated radially with respect to the axis of revolution (20) of the connection, the threaded zone (5) of the male end (3) being made up into the threaded zone (4) of the female end (2) such that the sealing surfaces (12) and (13) are in interfering contact, as are the abutment surfaces (7) and (8), the space between the terminal surface (15) and the recess (10) defining a volume (17), characterized in that the volume (17) is at least partially filled with a filling material (M). The invention also concerns a method for producing such a connection.
The invention concerns a method and a gauge for inspecting a self-locking threading provided close to one end of a tubular component used for the exploration or operation of hydrocarbon wells, said threading having a lead with a constant width and thread root widths which increase in the direction of the distal surface of the tubular component, characterized in that the gauge is suitable to be displaced in the self-locking threading to a locking position, said locking position then being marked and compared with a reference locking position.
G01B 3/40 - Calibres à mâchoire ouverte et faces opposées, c.-à-d. compas à calibrer, où la distance interne entre les faces est fixe, mais peut être réglée à l'avance pour pas de vis extérieurs
G01B 3/48 - Calibres à tampon pour les dimensions intérieures avec des surfaces de contact dont l'écartement est fixe, mais peut être réglé à l'avance pour filetage intérieur
In a threaded joint for steel pipes comprising a pin (1) and a box (2), each having a threaded portion (11 or 21), a sealing surface (13 or 23), and a shoulder surface (14, 15 or 24, 25), the sealing surface (13) of the pin (1) is formed by a tapered surface, and the sealing surface (23) of the box (2) is formed by a first curved surface portion with a large radius of curvature in the range of 15 - 120 mm, a tapered surface portion, and a second curved surface portion with a large radius of curvature again in the range of 15 - 120 mm.
A film-forming lubrication composition for make-up of threaded connections, intended to cover at least one threading (FE, FI) and a make-up abutment (BVM, BVF) of a threaded element (EM, EF) of a component (T2, T1) of a threaded tubular connection (JF) with a solid state film which adheres to the threading (FE, FI) and to said make-up abutment (BVM, BVF), said make-up abutment (BVM, BVF) being intended to bear against another abutment (BVF, BVM) of another component (T1, T2) of said threaded tubular connection (JF) during the terminal make-up phase, and said lubrication composition comprising a matrix. The matrix further comprises at least one rheoresistant material selected so as to endow said composition, as a complement to lubrication, with a shouldering torque which is at least equal to a threshold value.
The invention relates to a component used for the drilling and for the exploitation of hydrocarbon wells, said component having a substantially tubular shape with a first end (200; 100) connectable to a second end (100; 200) of another component also used for the drilling and for the exploitation of hydrocarbon wells, the first end (200; 100) including an end portion (210; 110) having a first abutment surface (211, 201; 111, 101) capable of interaction by clamping with a corresponding abutment surface (101, 111; 201, 211) of the second end (100; 200) and provided with a sealing surface (212; 102) capable of interaction by clamping with a corresponding sealing surface (102; 212) of the second end (100; 200), said end portion (210; 110) being preceded by a threaded area (220; 120) that can be screwed into a corresponding threaded area (120; 220) of the second end (100; 200), characterised in that a compressible space (214a, 214b) is provided in the body of the first end portion (210; 110) and partially under the sealing surface (212; 102) so as to reduce the radial stiffness of said end portion by at least 20% while maintaining at least 60% of the axial stiffness.
The invention relates to a device (100) for protecting the end (200) of a tubular component, said end (200) having a first threaded portion (201), the device (100) having a cap (110) with a second threaded portion (112) suitable for engaging with the first threaded portion (201) on the tubular component, and a ring (120) suitable for covering part of the outer surface of the end (200) of the tubular component, said device being characterized in that the ring (120) is attached to the cap (110), in such a way that the ring (120) is free to rotate about itself independently of the cap (110). Applicable to components used for drilling and operating hydrocarbon wells, particularly to expandable components.
F16L 57/00 - Protection des tuyaux ou d'objets de forme similaire contre les dommages ou les usures internes ou externes
B65D 59/00 - Bouchons, manchons, capuchons ou éléments analogues rigides ou semi-rigides, pour protéger des parties d'objets ou pour les mettre en paquets, p. ex. protecteurs pour filets de vis, protecteurs d'angles, chapeaux pour tubes ou pour faisceaux d'objets en forme de baguette
38.
SEALED THREADED TUBULAR CONNECTION WHICH IS RESISTANT TO SUCCESSIVE PRESSURE LOADS
A sealed threaded tubular connection which is resistant to successive pressure loads comprises a male element (1) including a male threading (3) and a female element (2) including a female threading (4) corresponding to the male threading (3). At least one of the elements comprises a lip (5) extending beyond the threading (3) to the free end of the element (6) and the other element comprises a recess (10) for the lip (5). The lip (5) comprises a first zone (7) with a peripheral surface turned towards the other element on which a first sealing surface (13) is disposed which can be radially interference fitted against a corresponding second sealing surface (11) disposed on the peripheral surface of the recess (10) of the other element. The lip (5) has a second axially located zone (8) between said first zone (7) and the free end of the element (6) which comprises a first radial bearing surface (14) turned towards the other element in contact with a corresponding second radial bearing surface (12) disposed on the peripheral surface of the recess (10) of the other element. The first and second zones (7, 8) are axially separated by a third zone (9) with a radial stiffness which is lower than the first and second zones (7, 8). This third zone (9) is capable of being radially deformed towards the other element by a pressure exerted thereon.
A pipe screw joint constituted of a pin and a box each having a contact surface having a threaded part and a thread-free metal contact part. A solid anticorrosive coating film which is made mainly of an ultraviolet-cured resin and is preferably transparent is formed on the contact surface of the pin. A solid lubricating coating film exhibiting a plastic or viscoplastic rheological behavior is formed on the contact surface of the box preferably from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant by the hot-melt method.
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
B05D 7/24 - Procédés, autres que le flocage, spécialement adaptés pour appliquer des liquides ou d'autres matériaux fluides, à des surfaces particulières, ou pour appliquer des liquides ou d'autres matériaux fluides particuliers pour appliquer des liquides ou d'autres matériaux fluides particuliers
A threaded joint for steel pipes comprising a pin (1) and a box (2). The pin has a male thread (11) and a lip (12) which comprises (i) a sealing surface (13) and (ii) a nose portion (16) provided with a shoulder surface. The box has a female thread (21), a sealing surface (23) and a shoulder surface. The shoulder surface of the pin comprises two distinct adjacent surfaces, main shoulder (14) in the inner side and sub shoulder (15) in the outer side. Correspondingly, the shoulder surface of the box comprises two distinct adjacent surfaces, main shoulder (24) in the inner side and sub shoulder (25) in the outer side. The main shoulder surfaces of the pin and box are disposed such as to prevent a radially inward deformation of the lip end, and the sub shoulder surfaces of pin and box are disposed such as to limit a radially outward deformation of the lip end. The main shoulder of the pin has a greater radial dimension than said sub shoulder of the pin, and at least the main shoulder surface of the pin is in axial abutment with at least the corresponding main shoulder surface of the box.
A threaded joint for steel pipes comprising a pin (1) and a box (2). The pin has a male thread (11) and a lip (12) which comprises (i) a sealing surface (13) and (ii) a nose portion (16) provided with a shoulder surface. The box has a female thread (21), a sealing surface (23) and a shoulder surface. The shoulder surface of the pin comprises two distinct adjacent surfaces, main shoulder (14) in the inner side and sub shoulder (15) in the outer side. Correspondingly, the shoulder surface of the box comprises two distinct adjacent surfaces, main shoulder (24) in the inner side and sub shoulder (25) in the outer side. The main shoulder surfaces of the pin and box are disposed such as to prevent a radially inward deformation of the lip end, and the sub shoulder surfaces of pin and box are disposed such as to limit a radially outward deformation of the lip end. The main shoulder of the pin has a greater radial dimension than said sub shoulder of the pin, and at least the main shoulder surface of the pin is in axial abutment with at least the corresponding main shoulder surface of the box.
A threaded tubular connection (1) comprises a female threaded portion (2) at the end of a first tubular component and a male threaded portion (3) at the end of a second tubular component, the female threaded portion (2) comprising a female thread (4), at least one female sealing surface (12) on its inner peripheral surface, at least one female axial abutment surface (8), the male threaded portion (3) comprising a male thread (5), at least one male sealing surface (13) on its outer peripheral surface, at least one axial abutment surface (7), and a lip (9) disposed between the sealing surface (13a) and an axial abutment surface (7) located at a free end of said threaded portion which is distant from the thread, the male thread (5) being made up into the female thread (4) such that at least one male axial abutment surface (7) is in contact with at least one female axial abutment surface (8), at least one male sealing surface being in interference contact with at least one corresponding female sealing surface, the portion of the lip (9) between the sealing surface and the axial abutment surface being radially distant from a corresponding surface of the other threaded portion, at least one leak channel (19) being provided in one of the threaded portions to place the chamber formed between the lip (9) and the corresponding surface of the other threaded portion in communication with the interior of the connection.
A lubricating film, which has excellent seizing resistance, gas tightness, and rust preventive properties, can prevent the yield of a screw-free metal contact part even upon fastening at a high torque, and is free from any harmful heavy metal such as lead, is formed on a special pipe screw joint comprising a pin and a box each having a contact surface with a screw part and a screw-free metal contact part (a seal face and a shoulder part). This lubricating film contains one of or both a rosin and calcium fluoride, a metallic soap, wax, and a basic aromatic organic acid metal salt and preferably further contains a lubricating powder, magnesiumcarbonate and/or carbohydrate, particularly cyclodextrin.
C10M 169/00 - Compositions lubrifiantes caractérisées en ce qu'elles contiennent comme constituants un mélange d'au moins deux types d'ingrédients, couverts par les groupes précédents, choisis parmi les matériaux de base, les épaississants ou les additifs, chacun de ces composés étant un composé essentiel
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
C10M 109/00 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé de constitution indéterminée ou incomplètement déterminée
C10M 117/00 - Compositions lubrifiantes caractérisées en ce que l'épaississant est un acide carboxylique non macromoléculaire ou ses sels
C10M 159/06 - Cires, p. ex. ozocérite, cérésine, gelée de pétrole ou paraffine non deshuilée
C10M 159/20 - Mélanges réactionnels comportant un excès de base neutralisante, p. ex. produits appelés superbasiques ou hautement basiques
C10N 20/00 - Propriétés physiques particulières des constituants des compositions lubrifiantes
C10N 30/00 - Propriétés physiques ou chimiques particulières améliorées par l'additif caractérisant la composition lubrifiante, p. ex. additifs multifonctionnels
C10N 30/06 - OnctuositéRésistance du filmAnti-usureRésistance aux pressions extrêmes
C10N 40/00 - Utilisation ou application particulière de la composition lubrifiante
C10N 50/10 - Forme sous laquelle est appliqué le lubrifiant au matériau à lubrifier semi-solideForme sous laquelle est appliqué le lubrifiant au matériau à lubrifier huileuse
A screw-threaded joint for a steel pipe includes a pin (1) and a box (2). The pin (1) has a tapered male screw thread (11), a tapered seal surface (13), and an end shoulder surface (14), while the box (2) has, in a corresponding manner, a tapered female screw thread (21), a tapered seal surface (23), and a shoulder surface (24). The pin (1) and the box (2) can be easily fastened together, and the screw-threaded joint has improved tightness at seal surfaces. The pin and the box have a contactless region (B) between the seal surfaces (13, 23) and the shoulder surfaces (14, 24), and the peripheral surfaces of the pin and the box do not make contact with each other in the contactless region (B). At least that portion of pin which is in the contactless region and adjacent the front end of the pin is a tapered surface portion (18) having substantially the same inclination angle as the tapered seal surface (13). Also, that portion of the box which is in the contactless region is substantially a circular cylindrical surface.
A threaded element (EM) of a component (T2) comprises at least first (FE1) and second (FE2) threading portions each comprising threads (TH1, TH2) each comprising a stabbing flank and a loading flank. The stabbing flanks and loading flanks of the threads (TH1) of the first threading portion (FE1) and the threads (TH2) of the second threading portion (FE2) are inclined in an opposed manner with respect to the radial direction.
The invention relates to an adhesive thin lubrication composition for covering at least one thread (FI) and a screwing abutment (BVF) of the threaded member (EF) of a component (T1) of a tubular threaded seal (JF). The screwing abutment bears against another abutment (BVM) of another component (T2) of the tubular threaded seal (JF) in the terminal screwing phase. The lubrication composition includes a matrix having dispersed therein at least one braking additive selected in order to impart thereto, and on top of the lubrication, a friction coefficient selected so as to obtain a torque on abutment value at least equal to a threshold value.
The coating of the invention includes a solid matrix adhering to the substrate and in which are dispersed particles (11) of at least one solid lubricant that belongs to the same one class. The solid matrix is lubricating and has a rheologic behaviour of the plastic or viscoplastic type. The invention can be used for protecting the threads of threaded members used in hydrocarbon wells against corrosion and seizure.
A threaded joint for steel pipes constituted by a pin having male threads and a box having female threads is improved with respect to ease of insertion of the pin and galling resistance of the threaded portions. The stabbing flanks of the threads in a complete thread portion of one of the pin and box has a two-step stabbing shape having a chamfer. The two-step stabbing shape has a stabbing flank angle α of 5 - 45° and a chamfer angle β of 20 - 60°. The ratio h/H of the chamfer height h to the thread height H of the pin is 0.25 - 0.50, or the ratio of the cross-sectional area of the chamfered portion to the overall cross-sectional area of the stabbing flank is made at least a value corresponding to a chamfer height ratio h/H of 0.25 and at most a value corresponding to a chamfer height ratio of 0.50.
A device (D) is provided for protecting a female end (EF) of a component (T) of a threaded tubular joint for drilling and operating hydrocarbon wells, provided with an internal threading (FI) and annular end surfaces (S1) and internal surfaces (S2) arranged respectively above and below the internal threading (F1) and each having selected first and second orientations. Said device (D) comprises a body (CP), provided with an external thread (FE) designed to cooperate with the internal thread (F1) and first (L1) and second (L2) flexible annular sealing elements arranged respectively above and below the external thread (FE) to provided first and second seals respectively at the internal annular surface (S2) and the end annular surface (S1). The first (L1) and second (L2) sealing elements have third and fourth selected orientations of which at least one differs by an angle of at least 10° from the corresponding second or first orientation before screwing the device (D) onto the female end (EF) and are deformable by axial flexion such as to achieve a force at least partly opposing an unwanted unscrewing by surface contact with the integral annular surface (S2) and the end annular surface (S1) when the female end (EF) is screwed on the body (CP) in a final position.
A threaded tubular connection which is leak-proof for internal and external successive pressure loads with comprises a male element (11) and a female element (12). At least one of the male or female elements (11, 12) comprises a lip (14, 16) between the threading (13, 15) and the free end of the element (17, 18). The lip (16) comprises a first zone (20) with a peripheral surface turned towards the other element (11) on which a first metallic sealing surface (22) is disposed which can be radially interference fitted against a corresponding second metallic sealing surface (23) disposed on the other element (11). The lip (16) has a second zone (21) located axially between said first zone (20) and the corresponding threading (15). The radial stiffness of the second zone (21) is less than that of the first zone (20) and that of a third zone adjacent to the second zone (21) in the direction of the threading (15), and zone (21) can be radially deformed by a pressure which is exerted thereon.
A screw joint for steel pipe of pin/box type having contact surfaces (30) including a threaded part and an unthreaded metal contact part is improved with respect to the leakage resistance, galling resistance and corrosion resistance, especially that to crevice corrosion. The contact surface of at least one of the pin and the box is covered with a first plating layer (34) of Cu-Zn alloy or Cu-Zn-M1 alloy (M1 is at least one selected from among Sn, Bi and In). The first plating layer on its downside and upside may be provided with a lower layer (32) consisting of Ni plating layer (32a) and/or Cu plating layer (32b) (one or both of the layers) and an upper layer of Sn-M2 alloy (M2 is at least one element selected from among Bi, In, Ni, Zn and Cu) plating layer (36). The plating layers may be overlaid with a lubricant coating (38) selected from among a solid lubricant coating (38a) and a viscous liquid or semisolid lubricant coating (38b).
C10M 159/06 - Cires, p. ex. ozocérite, cérésine, gelée de pétrole ou paraffine non deshuilée
C10M 159/24 - Mélanges réactionnels comportant un excès de base neutralisante, p. ex. produits appelés superbasiques ou hautement basiques contenant des radicaux sulfoniques
C23C 26/00 - Revêtements non prévus par les groupes
C25D 3/58 - Dépôt électrochimiqueBains utilisés à partir de solutions d'alliages contenant plus de 50% en poids de cuivre
C25D 5/12 - Dépôt de plusieurs couches du même métal ou de métaux différents au moins une couche étant du nickel ou du chrome
C25D 7/00 - Dépôt électrochimique caractérisé par l'objet à revêtir
The invention relates to a device (D) for protecting a male end (EM) of a component (T) of a tubular threaded joint for boring and using hydrocarbon wells, said male end (EM) being provided with at least one thread (FE1) on the outside and comprising a free terminal end (P1). The device according to the invention (D) comprises: i) a protective body (CP) embodied as a first sleeve and used to protect at least part of the external thread (FE1) and the free terminal part (P1); ii) a sealing element (EE) which can be brought into contact with the component (T), at least in a part arranged downstream of the outer thread (FE1) of the male end (EM), and also with the protective body (CP) in order to ensure a first tightness downstream of the end thread (FE1); and iii) fixing means (MF) used to displace the sealing element (EE) and/or the protective body (CP) radially towards the component (T), defining so-called 'open' and 'closed' positions of the device (D) in which the sealing element (EE) and/or the protective body (CP) are respectively not in contact with the component and in tight contact with the component (T). Furthermore, the first tightness is obtained when the device (D) is in a closed position.
A tubular threaded joint for connecting tubing or casing used to excavate oil wells have a lubricating coating formed from a lubricating coating composition comprising one or more basic lubricants selected from a basic sulfonate salt, a basic salicylate salt, a basic phenate salt, and a basic carboxylate salt and having biodegradability value (BOD) of at least 20% when measured after 28 days in seawater. The joint can be used without application of a compound grease containing heavy metals even in a country or region having severe environmental regulations.
C10M 107/18 - Polymères d'hydrocarbures modifiés par oxydation
C10M 109/00 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé de constitution indéterminée ou incomplètement déterminée
C10M 159/20 - Mélanges réactionnels comportant un excès de base neutralisante, p. ex. produits appelés superbasiques ou hautement basiques
C10M 159/22 - Mélanges réactionnels comportant un excès de base neutralisante, p. ex. produits appelés superbasiques ou hautement basiques contenant des radicaux phénol
C10M 159/24 - Mélanges réactionnels comportant un excès de base neutralisante, p. ex. produits appelés superbasiques ou hautement basiques contenant des radicaux sulfoniques
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
C10N 30/00 - Propriétés physiques ou chimiques particulières améliorées par l'additif caractérisant la composition lubrifiante, p. ex. additifs multifonctionnels
C10N 30/06 - OnctuositéRésistance du filmAnti-usureRésistance aux pressions extrêmes
C10N 30/12 - Inhibition de la corrosion, p. ex. agents antirouille, agents anticorrosifs
C10N 40/00 - Utilisation ou application particulière de la composition lubrifiante
C10N 50/02 - Forme sous laquelle est appliqué le lubrifiant au matériau à lubrifier en solution ou en suspension dans un liquide porteur qui s'évapore ultérieurement pour laisser un revêtement lubrifiant
54.
ULTRASONIC TESTING METHOD OF THREADED JOINT OF PIPES OR TUBES
There is provided a method for detecting an abnormal portion (defect, non-adhering portion, and seized portion) lying at a contact region between each part of a pin and each part of a box forming a threaded joint to be used as a joint of pipe or tubes such as OCTG. This invention provides an ultrasonic testing method of a threaded joint of pipes or tubes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part corresponding to each part of the pin on an inner peripheral surface and being fastened with the pin by way of a lubricant. The method according to the present invention comprising the steps of: transmitting and receiving ultrasonic waves to and from a plurality of locations along an axial direction of the threaded joint in at least one of the internal thread part, the metal seal part, and the shoulder part of the box; detecting echo intensities and reception times of echoes for the plurality of locations; and detecting an abnormal portion in the threaded joint based on axial directional distribution of the echo intensities and axial directional distribution of reception times of the echoes.
A threaded joint for steel pipes having excellent galling resistance, rust preventing properties, and airtightness without using a compound grease comprises a pin and a box each having a threaded portion and an unthreaded metal-to-metal contact portion serving as contact surfaces. The contact surfaces of at least one of the pin and the box are coated with a multi-layered structure comprising, from the bottom, a first layer formed from a first metal or alloy, a second layer formed from a second metal or alloy which is softer than the first metal or alloy, and an uppermost layer of a solid lubricating coating comprising a lubricating powder in an organic or inorganic binder.
F16L 15/04 - Raccords avec filetageFormes des filetages pour ces raccords avec des joints d'étanchéité supplémentaires
C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
56.
METHOD FOR EVALUATING FASTENING STATE OF THREADED JOINT OF PIPES OR TUBES AND METHOD FOR FASTENING THREADED JOINT OF PIPES OR TUBES USING THE METHOD
There is provided a method capable of evaluating a fastening state of a threaded joint that is used as a joint of pipes or tubes such as OCTG with a high degree of accuracy even after being fastened and a method for fastening a threaded joint of pipes or tubes using the evaluating method. The present invention provides a method for evaluating a fastening state of a threaded joint of pipes or tubes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part corresponding to each part of the pin on an inner peripheral surface and being fastened with the pin. The evaluating method according to the present invention is characterized by transmitting and receiving an ultrasonic wave to and from a plurality of locations along an axial direction of the threaded joint in at least one of the internal thread part, the metal seal part, and the shoulder part of the box; detecting echo intensities for the plurality of locations; and comparing the echo intensities detected for the plurality of locations to determine whether the fastening state of the threaded joint is good or bad.
A tubular threaded joint which has excellent resistance to compression and which permits easy tightening operation in the field in a vertical state comprises a pin having a male threaded zone and a box having a female threaded zone. The pin or the box has an end shoulder surface on its end, and the other member has a shoulder surface which abuts against the end shoulder surface. The screw threads of the male threaded zone and the female threaded zone are trapezoidal threads having a crest, a load flank, and a stabbing flank. The lip length, which is the distance in the axial direction of a member having an end shoulder surface between the end shoulder surface and the closest engaged thread to that surface, is at least 140 times the stabbing flank clearance, which is the distance in the axial direction between the stabbing flanks of the male thread and the female thread when the load flanks of the male and female threads contact each other. The stabbing flank of the male thread is preferably chamfered.
The invention relates to a female element (2) of a tubular threaded joint able to undergo diametral expansion in the plastic deformation range. The female element (2) is positioned at one end of a tubular component and on its external periphery comprises a means (10) of absorbing scratching energy of a scratching body able to be brought into contact externally with the female element (2), and a retaining means (11) for holding the said scratching energy absorbing means (10) in place. The retaining means (11) is intended to prevent debris from the said scratching energy absorbing means (10) from being released as the tubular threaded joint expands.
F16L 15/08 - Raccords avec filetageFormes des filetages pour ces raccords avec des éléments supplémentaires
E21B 17/042 - AccouplementsJoints entre tige et trépan, ou entre tiges filetés
E21B 43/10 - Mise en place de tubages, filtres ou crépines dans les puits
G01N 3/46 - Recherche de la dureté ou de la dureté au rebondissement en effectuant des empreintes sous une charge permanente par des dispositifs de pénétration, p. ex. sphère, pyramide les dispositifs de pénétration effectuant un mouvement de rayage
brevets
