Abstract: This device (2) for a coupling box portion (20) of a steel tube (4) intended for use in a tubular hydrocarbon working string includes a cylindrical sleeve portion (28) defining an inner cavity (60) intended to receive the coupling box portion (20). The protective device (2) is so configured to surround the coupling box portion (20).

Abstract: The present invention relates to low alloy steels with a high yield strength that present an improved sulphide stress cracking behaviour. The present invention also relates to tubular products, such as tubes or pipes, made from said steel, as well as a process for manufacturing such tubular products. In addition, the present invention concerns use of such tubular products for well drilling and/or for production, extraction and/or transportation of oil and gas.

Abstract: A threaded connection for steel pipe with improved sealing performance is provided. A threaded connection (1) for steel pipe includes a pin (10) and a box (20). The outer diameter of the box (20) is smaller than 108% of the outer diameter of a steel-pipe body (30). The pin (10) includes a pin lip (12) including a first seal surface (11), a male thread (13) constituted by a single-stage tapered thread, and a second seal surface (14). The box (20) includes a first seal surface (21), a female thread (23) constituted by a single-stage tapered thread, and a box lip (22) including a second seal surface (24). When assembled, the first seal surfaces (11, 21) are in contact with each other and the second seal surfaces (14, 24) are in contact with each other. A portion of the male thread (13) located near the end thereof close to the pin lip (12) includes a plurality of thread root surfaces extending parallel to the pipe axis (CL) and having the same diameter.

Abstract: A threaded joint is constructed of a pin and a box. The pin includes, in order from an end of the pin toward the tubular body: a first male threaded portion, a first sealing surface, a shoulder surface, a second sealing surface, and a second male threaded portion. The box includes a first female threaded portion, a first sealing surface, a shoulder surface, a second sealing surface, and a second female threaded portion. A length from a boundary of the first sealing surfaces to a position of the shoulder surfaces and a length from a boundary of the second sealing surfaces to a position are each at least 15 mm, and the total length which is a sum of the length and the length is at least 50 mm. Thus, the threaded joint is capable of providing excellent sealing performance.

Abstract: The threaded connection for pipes includes a pin, a box and a Zn—Ni alloy plating layer. The pin has a pin-side contact surface that includes a pin-side thread part. The box has a box-side contact surface that includes a box-side thread part. The Zn—Ni alloy plating layer is formed on at least one of the pin-side contact surface and the box-side contact surface. The Zn—Ni alloy plating layer is consisting of Zn, Ni, trace amount of Cr and impurities. The trace amount of Cr content of the Zn—Ni alloy plating layer is 5.0×10 counts/sec or more in terms of Cr intensity as measured by secondary ion mass spectrometry using O2+ ions as bombarding ions.

Abstract: A threaded connection partially in a self-locking arrangement includes a first and a second tubular component provided respectively with male and female threaded zone at their respective ends. Only a portion of a first portion with varying thread width of the male threaded zone cooperates by self-locking tightening with only a portion of the second portion with varying thread width of the female threaded zone when made up one into the other. The connection is able to withstand high torques required for special applications such as drilling with casing or intermediate casing.

Abstract: A temporary protector is for an extremity of a tubular joint component for drilling or operating hydrocarbon wells. The protector includes a sleeve to be attached to the component extremity and to protect a free end portion and a thread of the component extremity. The sleeve has a thread to engage with the thread of the component extremity and a peripheral sealing device assembled sealingly thereon such that it is liable to be brought into contact with a surface of the component located downstream of the thread of the component extremity, to provide a seal downstream of the thread. When the protector is being installed on the tubular component, at the time that the thread of the sleeve engages with the thread of the component extremity, at least one portion of the sealing is located axially downstream of the thread of the component extremity.

Abstract: A pin includes, in order from a free end thereof, a shoulder surface, a first sealing surface, a first male threaded portion, a second sealing surface, and a second male threaded portion. A box includes a shoulder surface, a first sealing surface, a first female threaded portion, a second sealing surface, and a second female threaded portion. The flank angles of load flanks of the first male threaded portion and the first female threaded portion are each less than 0 degrees. The first male threaded portion is composed of, in order from near the second sealing surface, an incomplete thread section and a complete thread section. The incomplete thread section has a length of at least three times the thread pitch thereof and has a thread height lower than the thread height of the complete thread section. The incomplete thread section is provided with clearances between crests and roots.

Abstract: A threaded joint is constructed of a pin and a box. The pin includes, in order from an end thereof, a shoulder surface, a nose portion, a first sealing surface, a first male threaded portion, an annular portion, a second sealing surface, and a second male threaded portion. The box includes a shoulder surface, a recessed portion, a first sealing surface, a first female threaded portion, an annular portion, a second sealing surface, and a second female threaded portion. In the threaded joint, in a fastened state, the shoulder surfaces are in contact with each other, the first sealing surfaces are in contact with each other, the second sealing surfaces are in contact with each other, a clearance is provided between the nose portion and the recessed portion, a clearance is provided between the annular portions.

Abstract: A device for determining the connection quality of threaded tubular components includes a case configured for mounting on an external surface portion of a threaded tubular component, at least one measuring device including a contact layer including a plurality of temperature sensors arranged to measure variables representative of temperatures at a plurality of locations E(i,j) of the external surface of the end of the tubular component.

Abstract: A set for producing a threaded connection, includes first, second, third, and fourth tubular component with axis of revolution, the first tubular component including at each of its ends a first and a second threaded zone provided on the inner peripheral surface of the component, the second tubular component including at each of its ends a third and a fourth threaded zone provided on the outer peripheral surface of the component, the third tubular component including at one of its ends a fifth and a sixth threaded zone respectively provided on the inner and outer peripheral surface of the component, the fourth tubular component including at one of its ends a seventh and an eighth threaded zone respectively provided on the inner and outer peripheral surface of the component. The first and sixth, third and fifth, second and eighth, fourth and seventh threaded zones cooperate with one another on makeup.

Abstract: A method for manufacturing a connecting part includes a first portion having a threaded end that is able to be screwed to the end of a first tubular component for connecting the connecting part to said first tubular component, the method comprising a step of producing, by an additive manufacturing method, a second portion of the connecting part juxtaposed with the first portion having a threaded end. Moreover, the first portion having a threaded end is obtained by reworking the first portion on a separate tubular component of the connecting part in order to be joined to the connecting part.

Abstract: The invention concerns an abutment for a tubular component, said abutment being overlaid with a coating comprising a principal layer constituted by an alloy selected from nickel-phosphorus alloys, copper-nickel alloys and nickel-tungsten alloys. The invention also concerns a tubular component comprising said abutment and a method for producing such an abutment.

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 threaded connection includes a first and a second tubular component made up one with the other. A male element of the first component includes, on its external peripheral surface, a male inner lip including an inner ring with a minimum thickness Epi and a male threaded zone. One inner end of said male threaded zone is at a non-zero axial distance (Li) from a male distal end. A female element of the second component includes, in succession over its internal peripheral surface, a female inner recess disposed facing the male inner lip and a female threaded zone, such that in the made up position of the connection, a radial clearance subsists between the male inner ring and the female inner recess and an internal seal is formed locally between the male inner lip and the female inner recess. The connection is such that 10%?Epi/Li.

Abstract: A method for producing a matrix-containing dry film on a threaded tubular component for drilling or working hydrocarbon wells, by applying a mixture containing a dispersion or an aqueous emulsion of an acrylic copolymer with a solution of an alkaline polysilicate in a liquid state onto a threaded end of the threaded tubular component by spraying at a temperature of from 20° C. to 40° C. thereby obtaining a threaded end coated with a film; drying the threaded end coated with the film; and densifying the film.

Abstract: A connecting element for a tubular component, the connecting element being overlaid with a coating including a principal layer constituted by a nickel-phosphorus alloy, a tubular component including one or more such connecting elements, and a method for producing such a connecting element.

Abstract: A threaded connection includes first and second tubular components, each including a respective male and female end. The male and female ends each include at least one threaded zone and finish in a terminal surface. The male threaded zone includes a first portion in which a width of teeth, CWTp, increases from a value CWTpmin corresponding to a width of a tooth closest to the terminal surface of the male end to a value CWTpmax corresponding to a width of a tooth furthest from the terminal surface. A width of teeth CWTb of the female threaded zone decreases from a value CWTbmax corresponding to a width of a tooth furthest from the terminal surface of the female end to a value CWTbmin corresponding to a width of a tooth closest to the terminal surface. The threaded zones cooperate in accordance with a self-locking make-up, with CWTpmin/CWTbmax?0.2 and CWTbmin/CWTpmax?CWTpmin/CWTbmax.

Abstract: A composition for solid coating formation, includes a mixed solvent including water and a dipolar aprotic solvent, a powdery organic resin which is partially soluble at least in the dipolar aprotic solvent. The powdery organic resin is dissolved or dispersed in the mixed solvent.

Abstract: A threaded joint for steel pipe is provided that ensures good sealing performance and reduces crevice corrosion. A threaded joint includes a pin (10) and a box (20). The pin (10) includes a first shoulder surface (11), a first male thread (14), a second shoulder surface (18), and a second male thread (17). The box (20) includes a first shoulder surface (21), a first female thread (24), a second shoulder surface (28), and a second female thread (27). Supposing that the distance between the shoulder surfaces of the pin (10) is represented as Lpin and the distance between the shoulder surfaces of the box (20) is represented as Lbox, and the interference ?shld is defined by Equation (1) given below, then, the threaded joint is constructed such that Equations (2) and (3) given below are satisfied.