Electro-hydraulic surface controlled subsurface safety valve actuator
US6269874A · kind A · utility
50Cited by
4References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Apr 29, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electro-hydraulic surface controlled subsurface safety valve is controllable entirely electrically. The actuator operates on an electrically actuated pressure pump and a supply of hydraulic fluid reservoired in the tool proximate to the safety valve. A dump valve is normally open so that if power fails, pressure is released and the safety valve closes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.