Subsurface safety valve
US4287954A · kind A · utility
4Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1979 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Aug 20, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface safety valve having a flapper-like pivoting closure element that is moved to and from the open and closed positions by a reciprocating operator assembly. When moved to the open position, the closure element is pivoted out of the flow path to protect it from possible damage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.