Premium threaded tubular joint comprising at least a threaded element with end lip
US7334821B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 3, 2002 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Apr 18, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/004
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A premium threaded tubular connection including, on at least one threaded element, a distal abutment surface at the free end of a threaded element, and a lip sealing surface at a given distance from the threading. The lip includes an appendix that extends the lip towards its free end beyond the lip sealing surface 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 other advantages of precision of real makeup torque, mechanical strength in axial compression, a shock barrier effect, and tolerance in engaging the threaded elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.