Subsurface solenoid latched safety valve
US4579177A · kind A · utility
42Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1985 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Feb 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86936
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface solenoid well safety valve which is locked in the open position, after being opened mechanically, for preventing the valve from closing. A valve closure member is controlled by a tubular member which is mechanically moved downwardly to open the valve. An armature movable in the housing is actuated by a solenoid coil for locking the tubular member in the open position to the valve housing. Deenergization of the coil releases the armature and the lock and allows the tubular member to be biased to the open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.