Control valve system for blowout preventers
US4509405A · kind A · utility
58Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1982 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Jan 11, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/775
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control valve system and method are disclosed for blowout preventers having an actuating piston for actuating the closing of the blowout preventer whereby the piston has an opening side and a closing side. The control valve system and method include a means for selectively directing fluid from the opening side of the actuating piston to the closing side of the actuating piston in order to reduce the fluid requirements for closing the blowout preventer and reduce installed horsepower requirements thereby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.