Pressure assisted blowout preventer
US9410393B2 · kind B2 · utility
1Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/063
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A blowout preventer (BOP) includes a pressure driven operator that is equipped with a balancing circuit to offset pressure inside the BOP. The operator, which is used to drive a ram, includes a piston, coupled to the ram by an operator arm, and a balance arm on a side of the piston opposite the operator arm. Pressure from inside the BOP communicates to an end of the balance arm opposite the piston and exerts a force to drive the ram radially inward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.