Externally activated seal system for wellhead
US7740061B2 · kind B2 · utility
19Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2007 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Sep 24, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/03
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for installing casing hangers in a wellbore utilizing an externally activated gripping system to temporarily bind wearbushings secured to casing and tubing hangers in order to lock-down such hangers during various wellbore drilling activities, thereby minimizing the size of landing shoulders and eliminating additional lock down equipment and simplifying running procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.