Blowout preventer with pressure-isolated operating piston assembly
US8944403B2 · kind B2 · utility
11Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2012 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jul 19, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0491
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ram-type blowout preventer including an operating piston assembly isolated from wellbore pressure effects is provided. In one embodiment, a blowout preventer includes piston coupled to a ram by a connecting rod, and the connecting rod is inserted into a recess in the ram. A pressure-isolating seal may be provided in the recess between the connecting rod and the ram to isolate the end of the connecting rod within the recess from wellbore pressure in the blowout preventer. Additional systems, devices, and methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.