Pin-actuated lock ring arrangement
US9074448B2 · kind B2 · utility
2Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | May 13, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/03
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a wellhead near the top of an oil and gas well, a locking ring assembly for locking an inner tubular wellhead member axially relative to an outer tubular wellhead member. The inner tubular member has a circumferential recess that contains a locking ring. After insertion of the inner tubular member into the outer tubular member, actuating pins radially expand the locking ring so that it partially leaves the circumferential recess and engages a corresponding recess in the outer tubular member. The pins may be deployed by a seal inserted above the inner tubular member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.