Bi-directional sealing ram
US6164619A · kind A · utility
39Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2567
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shuttle valve assembly in a ram-type BOP selectively connects the volume behind the rams to the more highly pressurized wellbore volume adjacent to the rams (either above or below the rams). The connection made is free flowing in both directions (no check valves) allowing for evacuation and fluctuations with changes in wellbore pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.