Deformation resistant opening chamber head and method
US9109421B2 · kind B2 · utility
0Cited by
15References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Jan 28, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An annular blowout preventer device includes a body and a static head removably connected to the body, A piston is disposed inside an opening chamber to squeeze a packer. An opening chamber head has a rib extending upward from an upper surface. The rib is received within a recess in the lower surface of the static head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.