Abstract: To produce a sealing contact between male and female threaded elements, a contact zone is provided, located between male and female threading portions separated from each other in an axial direction. The male and female elements have respective cylindrical portions that extend over the entire length of the contact zone. After expansion, a sealing contact is established between surfaces in two annular areas by a radial interference fit.

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 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 female element of a threaded tubular connection that is fitted to undergo diametrical expansion in a plastic deformation region. The female element is disposed at one end of a tubular component and includes on its external periphery a mechanism that absorbs scratch energy of a scratching body that may come into external contact with the female element and a mechanism that retains the scratch energy absorption mechanism. The retaining mechanism is configured to prevent release of debris from the scratch energy absorption mechanism during expansion of the threaded tubular connection.

Abstract: An expandable tubular joint including a male element 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 element 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 a first annular housing. The male tubular element includes a local added thickness at a fourth inner surface projecting out from the second abutting surface. After screwing, the first lip is housed in the annular housing and the abutting surfaces rest against one another, in order to enable the formation of an annular shoulder at the first outer surface during diametral expansion.

Abstract: A male element for a sealed threaded tubular connection. Before tapered reduction swaging of an end region of a tube and machining in the region of a tapered male threading and a male lip to obtain a male tubular element for makeup into a female tubular element to form a sealed threaded tubular connection after diametrical expansion, the tube is shaped over a portion of its length to produce a cylindrical internal surface that connects via a chamfer to the cylindrical internal surface of the lip obtained subsequently by machining, the radius of the first surface being greater than the radius of the second surface.

Abstract: A female element of a threaded tubular connection that is fitted to undergo diametrical expansion in a plastic deformation region. The female element is disposed at one end of a tubular component and includes on its external periphery a mechanism that absorbs scratch energy of a scratching body that may come into external contact with the female element and a mechanism that retains the scratch energy absorption mechanism. The retaining mechanism is configured to prevent release of debris from the scratch energy absorption mechanism during expansion of the threaded tubular connection.

Abstract: A male element for a sealed threaded tubular connection. Before tapered reduction swaging of all end region of a tube and machining in the region of a tapered male threading and a male lip to obtain a male tubular element for makeup into a female tubular element to form a sealed threaded tubular connection after diametrical expansion, the tube is shaped over a portion of its length to produce a cylindrical internal surface that connects via a chamfer to the cylindrical internal surface of the lip obtained subsequently by machining, the radius of the first surface being greater than the radius of the second surface. Such all element may, for example, find application to hydrocarbon wells.

Abstract: The invention relates to an assembly comprising two symmetrically-disposed expandable threaded tubular joints, each of said joints consisting of: (i) a male tubular element (EM1, EM2) which is placed at one end of a tube (T1, T2) and which is equipped with (a) a male thread (FM), (b) a first annular lip (L1) having a first axially abutting surface (SB 1), a first inner surface (SI1) and a first outer surface (SE1), and (c) a second abutting surface (SB2); and (ii) a female tubular element (EF1, EF2) which is equipped with (a) a female thread (FF), (b) a second annular lip (L2) having a third abutting surface (SB3), a second outer surface (SE2) and a second inner surface (SI2), and (c) a third inner surface (SI3) and a fourth axially abutting surface (SB4) which, together with the second outer surface (SE2), defines an annular housing (LO) homologous to the corresponding first lip (L1).

Abstract: The invention relates to an expandable tubular joint comprising: (i) a male tubular element (EM) which is equipped with a male thread (FM), a first annular lip (L1) having a first axially abutting surface (SB1), a first inner surface (SI1) and a first outer surface (SE1), and a second abutting surface (SB2); and (ii) a female tubular element (EF) which is equipped with a female thread (FF), a second annular lip (L2) having a third abutting surface (SB3), a second outer surface (SE2) and a second inner surface (SI2), and a third inner surface (SI3) and a fourth axially abutting surface (SB4) which, together with the second outer surface (SE2), defines a first annular housing (LO) homologous to the first lip (L1). According to the invention, the male tubular element (EM) initially comprises a local annular added thickness (SA1) at a fourth inner surface (SI4) which projects out from the second abutting surface (SB2).

Abstract: The invention relates to a sealed tubular joint, initially comprising a first male tubular element (EM), with a male thread (FM), a first annular lip (L1), with a first axial abutting surface (SB1), a first internal surface (SI1), a section of a first external surface (SE1), a second abutting surface (SB2) and a second female tubular element (EF), with a female thread (FF), matching the male thread (FM), a second annular lip (L2), with a third abutting surface (SB3), a second external surface (SE2), arranged to face the first internal surface (SI1), a second internal surface (SI2) and a fourth axial abutting surface (SB4), supporting the first abutting surface (SB1) and defining, in particular with the second external surface (SE2), an annular housing (LO), matching the first lip (L1).

Abstract: To produce a sealing contact between male and female threaded elements, a contact zone is provided, located between male and female threading portions separated from each other in an axial direction. The male and female elements have respective cylindrical portions that extend over the entire length of the contact zone. After expansion, a sealing contact is established between surfaces in two annular areas by a radial interference fit.