1 Shows an axial half cross section of the tubular joint sealed and resistant to stresses of successive pressures

摘要

Tubular threaded joint sealed and resistant to stresses of successive pressures comprising a male element (1) comprising a male thread (3) and a female element (2) comprising a female thread (4) corresponding to the male thread (3). At least one of the elements comprises a lip (5) extending beyond the thread (3) to the free end of the element (6) and the other element comprises a housing (10) for the lip (5). The lip (5) comprises a first zone (7) with a peripheral surface turned towards the other element on which is arranged a first sealing surface (13) able to be clamped against a second sealing surface (11) arranged on the corresponding peripheral surface of the housing (10) of the other element. The lip (5) has a second zone (8) located axially between the said first zone (7) and the free end of the element (6) which comprises a first radial support surface (14) is turned towards the other element in contact with a second radial support surface (12) arranged on the corresponding peripheral surface of the housing (10) of the other element. The first and second zones (7, 8) are separated axially by a third zone (9) of the radial stiffness less than the first and second zones (7, 8). This third zone (9) is adapted to be deformed radially towards the other element by a pressure exerted on the.