Apparatus and method for sealing a wellbore
US7510002B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2005 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jul 25, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/061
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved valve for sealing a wellbore and method of use, in particular for prevention of well blow outs. In one embodiment, the apparatus is designed to seal a well through rotation of rams. The rams may be actuated to seal the well without having to work against full well pressure as fluid volumes in the apparatus housing, which also contains the rams, are preserved. This functionality allows the apparatus to be constructed with smaller dimensions than existing prior art blow out prevention valves aiding handling and manoeuvrability. The improved valve according to one embodiment also has a mechanism that guides a wireline or a pipeline being run in the wellbore to the centre of the bore and allows a seal to be formed around the wireline or pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.