Wellhead seal unit
US7413023B2 · kind B2 · utility
16Cited by
14References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2003 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Mar 18, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead seal unit for sealing a subsea oil and/or gas well at the wellhead. The unit comprises a sleeve, sealingly engaged to the workstring and to which, blow out preventer rams can engage. The unit allows the workstring to be rotated and reciprocated within the wellbore without releasing the seal. Methods of cleaning the sealed well and performing an inflow test are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.