Spherical-annular blowout preventer having a plurality of pistons
US9121245B2 · kind B2 · utility
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10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2013 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Apr 17, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A blowout preventer assembly is provided and is generally configured having an upper housing, a lower housing with a plurality of internally interconnected cylinders, a one piece energizing ring, and a plurality of individual bottom cover plates all enclosing a lower housing column bore for receiving well pipe. The blowout preventer assembly also has a plurality of annular pistons, a plurality of associated glands disposed in each cylinder with each piston, a main seal with a plurality of main seal ribs, an adaptor ring, and various dedicated and associated seals and threaded attachments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.