Well tool
US3987849A · kind A · utility
4Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Apr 9, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7725
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface safety valve well tool securable in a well conduit for controlling flow of fluid through the bore of the conduit. An increase or decrease in the well pressure from the normal flowing pressure of the well operates a rotatable ball valve to block flow of fluid through the conduit. Increasing and then decreasing the pressure in the bore above the ball valve rotates the valve to enable flow of fluid through the conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.