A PREMIUM THREADED TUBULAR CONNECTION COMPRISING AT LEAST ONE THREADED ELEMENT WITH AN END LIP

摘要

THE PREMIUM THREADED TUBULAR CONNECTION COMPRISES, ON AT LEAST ONE THREADED ELEMENT, A DISTAL ABUTMENT SURFACE (7) AT THE FREE END OF A THREADED ELEMENT AND A LIP-SEALING SURFACE (5) AT A GIVEN DISTANCE FROM THE THREADING.THE LIP COMPRISES AN APPENDIX (13), WHICH EXTENDS THE LIP TOWARDS ITS FREE END BEYONDTHE LIP-SEALING SURFACE (5) SO THAT THE LIP HAS BOTH HIGH RADIAL STIFFNESS AND LOW AXIAL STIFFNESS.THIS RESULTS IN ENHANCED PERFORMANCE AS REGARDS THE SEAL OF THE THREADED CONNECTION UNDER PRESSURE AND/OR UNDER TENSION, AND IN OTHER ADVANTAGES (PRECISION OF REAL MAKEUP TORQUE,MECHANICAL STRENGTH IN AXIAL COMPRESSION, A SHOCK BARRIER EFFECT, TOLERANCE IN ENGAGING THE THREADED ELEMENTS).(FIG. 5)