Externally activated seal system for wellhead
US7128143B2 · kind B2 · utility
24Cited by
9References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2003 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Apr 18, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0422
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for a seal assembly for a unitized wellhead system for land or platform applications utilizes a friction grip technology to create maintainable metal-to-metal seals with finely-controlled contact stresses, lock-down casing and tubing hangers, support test loads to minimize the size of landing shoulders required, and to rotationally lock casing hangers to provide simplified running procedures. The system can be used in combination with a friction grip clamping assembly to greatly streamline the wellhead design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.