Threaded tubular connection which is leak-proof under internal and external successive pressure loads

• Main Authors: PATUREAU CLAIRE, TARTAR OLIVIER
• Format: Patent
• Language: Chinese; English
• Published: 20.01.2010
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

A threaded tubular connection which is leak-proof for internal and external successive pressure loads with comprises a male element (11) and a female element (12). At least one of the male or female elements (11, 12) comprises a lip (14, 16) between the threading (13, 15) and the free end of the element (17, 18). The lip (16) comprises a first zone (20) with a peripheral surface turned towards the other element (11) on which a first metallic sealing surface (22) is disposed which can be radially interference fitted against a corresponding second metallic sealing surface (23) disposed on the other element (11). The lip (16) has a second zone (21) located axially between said first zone (20) and the corresponding threading (15). The radial stiffness of the second zone (21) is less than that of the first zone (20) and that of a third zone adjacent to the second zone (21) in the direction of the threading (15), and zone (21) can be radially deformed by a pressure which is exerted thereon.