Retrievable oil and or gas well blowout preventer
US7431079B1 · kind B1 · utility
2Cited by
8References
15Claims
0Family size
Inventor
Key dates
| Filing date | Aug 1, 2005 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Aug 1, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well blowout prevention apparatus that can be inserted into the well bore of a subterranean well, to confine fluid in the well when the fluid experiences or exerts a pressure surge, is described. Methods of using the well blowout prevention apparatus are also described. The apparatus is adapted to be manipulated from above by a pipe-string or other instrument, to readily disengage from the inner well casing wall, and to be retrievable from inside the well bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.