Safety valve
US4417600A · kind A · utility
17Cited by
0References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8225
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A manually operated valve. The valve has a housing with a uniform outside diameter compatible with the outside diameter of flow conductors attached to the valve. An operating sleeve is movable longitudinally within the housing by engagement with a shifting tool from the exterior of the housing. The operating sleeve shifts the valve between its open and closed positions. A detent spring is provided to give an indication when the shifting tool has moved the operating sleeve sufficient to fully open or close the valve. The valve is particularly adapted for using in a drill string or workover string in an oil or gas well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.