Casing valves system for selective well stimulation and control
US9464507B2 · kind B2 · utility
1Cited by
24References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2013 |
| Grant date | Oct 11, 2016 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A valve for use in a tubular string in a subterranean well includes a sleeve having first and second opposite ends, the sleeve being displaceable between open and closed positions to thereby selectively permit and prevent flow through a sidewall of a housing assembly, and a first and second pistons at the respective first and second ends of the sleeve. Pressure differentials applied to the first and second pistons are operative to displace the sleeve between its open and closed positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.