Gas storage well safety valve apparatus
US3978922A · kind A · utility
10Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Feb 26, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7836
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In accordance with an illustrative embodiment of the present invention, a subsurface safety valve assembly that automatically closes in response to a drop in flowing pressure at the valve to a value that is below a set dome pressure, is provided with a flow restriction upstream of the valve that is sized to enable rapid closing of the safety valve in the event of disruption of surface flow lines or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.