Threaded tubular connection which is leak-proof under internal and external successive pressure loads
US8641100B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 6, 2008 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Feb 19, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/042
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A threaded tubular connection that is leak-proof for internal and external successive pressure loads including a male element and a female element. At least one of the male or female elements includes a lip between the threading and the free end of the element. The lip includes a first zone with a peripheral surface turned towards the other element on which a first metallic sealing surface is disposed that can be radially interference fitted against a corresponding second metallic sealing surface disposed on the other element. The lip includes a second zone located axially between the first zone and the corresponding threading. The radial stiffness of the second zone is less than that of the first zone and that of a third zone adjacent to the second zone in the direction of the threading, and the second zone can be radially deformed by a pressure exerted thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.