Patent ID: 7334821
Filing Date: 2008-02-26
Classification: E21B,F16L

Abstract:
1. A threaded tubular connection comprising: a male threaded element at an end of a first tubular component and a female threaded element at an end of a second tubular component, the male threaded element comprising a male threading, at least one male sealing surface on its external peripheral surface, and at least one male axial abutment surface, the female threaded element correspondingly comprising a female threading, at least one female sealing surface on its internal peripheral surface, and at least one female axial abutment surface, the male threading being made up into the female threading until at least one male axial abutment surface cooperates with the corresponding female axial abutment surface to produce an abutting reaction against makeup torque, each male sealing surface then interfering radially with a corresponding female sealing surface, at least one threaded element having a distal axial abutment surface among the axial abutment surface or surfaces producing an abutting reaction, formed on a front surface of the free end of the at least one threaded element, a lip separating the distal axial abutment surface from the threading on the at least one threaded element, one single lip sealing surface being disposed on the lip at an axial distance from the end of the threading, wherein the lip comprises, between the distal axial abutment surface and the one single lip sealing surface, an appendix having a peripheral surface facing the threaded element cooperating with the at least one threaded element that is distinct from the lip sealing surface, and an effective contact width where the male sealing surface and female sealing surface make contact is disposed on the one single lip sealing surface and is inclined at a taper with respect to an axis of the threaded tubular connection at a first angle, a root of the threading is disposed with respect to the axis of the at least one threaded element at a second angle, and the second angle is less than the first angle.