Subsea wellhead keyless anti-rotation device
US8469102B2 · kind B2 · utility
1Cited by
2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2010 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Feb 28, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/035
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An anti-rotation device prevents an inner wellhead housing from rotating within an outer wellhead housing. The anti-rotation device provides cam rollers within the inner wellhead housing that wedge between opposing surfaces of the inner wellhead housing and outer wellhead housing to arrest either clockwise or counter-clockwise rotation of the inner wellhead housing. The cam rollers are circumferentially spaced apart around the inner wellhead housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.