| 摘要 |
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 (L 1 ), with a first axial abutting surface (SB 1 ), a first internal surface (SI 1 ), a section of a first external surface (SE 1 ), a second abutting surface (SB 2 ) and a second female tubular element (EF), with a female thread (FF), matching the male thread (FM), a second annular lip (L 2 ), with a third abutting surface (SB 3 ), a second external surface (SE 2 ), arranged to face the first internal surface (SI 1 ), a second internal surface (SI 2 ) and a fourth axial abutting surface (SB 4 ), supporting the first abutting surface (SB 1 ) and defining, in particular with the second external surface (SE 2 ), an annular housing (LO), matching the first lip (L 1 ). The second (SB 2 ) and third (SB 3 ) abutting surfaces are initially conical with angles of inclination which are effectively identical and which permit, on screwing, the contact of the second abutting surface (SB 2 ) against the third abutting surface (SB 3 ), generating a first radial locking and sealing contact of the first internal surface (SI 1 ) or external surface (SE 1 ) against the second external surface (SE 2 ), or the third internal surface (SI 3 ), and then, with a diametrical expansion in the region of the plastic deformation by means of an axially-displaceable expansion tool, the first external surface (SE 1 ) and the third internal surface (SI 3 ) are forced to locally define a second locking and sealing contact.
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