Downhole subsurface safety valve device
US6719057B2 · kind B2 · utility
15Cited by
17References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Dec 7, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole subsurface safety valve device, where an actuator is mounted on the outside of the well on the Christmas tree and the valve is operated by a mechanical transmission which may be linear (an hydraulic actuator) or rotary (an electric motor).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.