Abstract: An assembly including two symmetrically-disposed expandable threaded tubular joints. The joints including a male tubular element at one end of a tube and equipped with a male thread, a first annular lip having a first axially abutting surface, a first inner surface and a first outer surface, and a second abutting surface; and a female tubular element equipped with a female thread, a second annular lip having a third abutting surface, a second outer surface and a second inner surface, and a third inner surface and a fourth axially abutting surface which, together with the second outer surface, defines an annular housing homologous to the corresponding first lip. The two female tubular elements form two opposing ends of a female/female-type sleeve.

Abstract: A pipe string component that connects an offshore platform with a sea bed is provided. The pipe string component includes a threaded tubular connection. The threaded tubular connection includes a male tubular element including a tapered male threading, and a female tubular element including a tapered female threading that cooperates with the male threading by makeup to produce a rigid mutual connection of the tubular elements with radial interference between radial load transfer zones of the threadings. The male and female threadings each have a load flank extending substantially perpendicularly to an axis of the male and female threadings. The radial load transfer zones are at a radial distance from envelopes of thread roots of the male and female threadings. The radial load transfer zones of the threadings comprise at least one surface substantially parallel to an axis of the connection.

Abstract: A set for manufacturing a threaded connection, including first and second tubular components with an axis of revolution, one of their ends including a threaded zone formed on the external or internal peripheral surface of the component depending on whether the threaded end is of male or female type, the ends finishing in a terminal surface.

Abstract: A set for producing a threaded connection and a threaded connection. The set includes first and a second tubular components with an axis of revolution, one of their ends including a threaded zone formed on the external or internal peripheral surface of the component depending on whether the threaded end is of male or female type, the ends finishing in a terminal surface orientated radially with respect to the axis of revolution of the tubular components. The threaded zones include threads including, viewed in longitudinal section passing through the axis of revolution of the tubular components, a thread crest, a thread root, a load flank, and a stabbing flank, the width of the thread crests of each tubular component reducing in the direction of the terminal surface of the tubular component under consideration, while the width of the thread roots increases. 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.

Abstract: 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.

Abstract: An apparatus which can thinly and uniformly apply a highly viscous lubricant on the threaded portion of a threaded joint for pipes comprises a steel pipe support unit which supports a steel pipe P having a pin while rotating the pipe, a lubricant circulation system in which a lubricant having its viscosity adjusted so as to be sprayable is circulated, a metering unit having a metering pump capable of metering the lubricant, a lubricant spraying unit having spray guns for spraying lubricant through nozzles toward the pin, a spray gun support unit which supports the spray guns so as to be movable in the axial and/or radial directions of the steel pipe P; and a controlling unit which controls the rotational speed of the steel pipe P by the steel pipe support unit and the speeds of movement of the spray guns by the spray gun support unit.

Abstract: 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.

Abstract: 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

Abstract: An ultrasonic testing method relates to a threaded joint of pipes 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 with the box and pin being fastened together using a lubricant. The method includes 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 a longitudinal axial directional distribution of the echo intensities and longitudinal axial directional distribution of reception times of the echoes.

Abstract: 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.

Abstract: 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.

Abstract: A threaded connection including first and second tubular components, each including a respective male and female end, the male end including, on its external peripheral surface, at least one threaded zone and finishing in a terminal surface orientated radially with respect to the axis of the connection, the female end including, on its internal peripheral surface, at least one threaded zone and finishing in a terminal surface orientated radially with respect to the axis of the connection.

Abstract: 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)

Abstract: A tubular joint, with a first male tubular element, with a male thread, a first annular lip, with a first axial abutting surface, a first internal surface, a section of a first external surface, a second abutting surface and a second female tubular element, with a female thread, matching the male thread, a second annular lip, with a third abutting surface, a second external surface, arranged to face the first internal surface, a second internal surface and a fourth axial abutting surface, supporting the first abutting surface and defining, in particular with the second external surface, an annular housing, matching the first lip. The second and third abutting surfaces being conical with effectively identical inclines and which permit generating a first radial sealing contact of the first internal surface or external surface against the second external surface, or the third internal surface, and, with expansion, provides a second sealing contact.

Abstract: A threaded joint for steel pipes comprising a pin 1 having a tapered male thread 11, a tapered sealing surface 13, and an end shoulder surface 14 and a box 2 having correspondingly a tapered female thread 21, a tapered sealing surface 23, and a shoulder surface 24 which is capable of easy tightening and has improved air tightness by the sealing surfaces is arranged such that the pin and the box each have a noncontacting region B where the peripheral surfaces of the pin and the box do not contact each other between the sealing surfaces 13, 23 and the shoulder surfaces 14 and 24. At least a portion of the noncontacting region of the pin adjoining the to end of the pin is a tapered surface portion 18 having substantially the same angle of slope as the tapered sealing surface 13, and the noncontacting region of the box is a substantially cylindrical surface.

Abstract: 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.

Abstract: 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.

Abstract: A tubular joint in which radial expansion caused by the passage of an expander, inclined shoulder fittings formed respectively on a peripheral surface of the female element facing radially inwards and on a peripheral surface of the male element facing radially outwards, are subjected to a relative axial displacement towards each other to be urged into sealed mutual contact with radial interference. The tubular joint is, for example, useful in hydrocarbon wells.

Abstract: A method and a gauge for inspecting a self-locking threading provided close to one end of a tubular component used for exploration or operation of hydrocarbon wells, the threading including a lead with a constant width and thread root widths that increase in the direction of a distal surface of the tubular component. The gauge can be displaced in the self-locking threading to a locking position, the locking position then being marked and compared with a reference locking position.

Abstract: A device for protecting the end of a tubular component, the end including a first threaded zone. The device includes a protecting end including a second threaded zone configured to cooperate with a first threaded zone of the tubular component, and a ring configured to cover a portion of the outer surface of the end of the tubular component. The ring is bound up with the protecting end such that the ring is free to turn about itself independently of the end. Such a device may find application to components used for drilling and operating hydrocarbon wells, for example in particular expandable components.