Retrievable safety valve
US4071088A · kind A · utility
9Cited by
15References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1975 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Sep 19, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87981
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A new and improved subsurface safety valve which is inserted into well tubing without requiring removal of the tubing, and which replaces worn, deteriorated and fully or partially inoperative safety valves in the well tubing to prevent blow-outs in wells. The replacement subsurface safety valve may be subsequently removed after insertion without requiring removal of the well tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.