Closure mechanism with integrated actuator for subsurface valves
US6957703B2 · kind B2 · utility
62Cited by
31References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2002 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Feb 7, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface safety valve has a closure sleeve or rod mounted below the closure mechanism. Control signal pushes the sleeve up (uphole) or down (downhole), whichever is applicable, which causes the closure element to rotate (or slide, or otherwise translate) to its open position. A loss of control signal allows the closure spring to push the sleeve or rod downhole (or uphole, whichever is appropriate). This movement causes the closure element to be driven to its closed position against the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.