Well packer valve arrangement
US4402517A · kind A · utility
12Cited by
11References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1982 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Aug 13, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A valve system for use in inflating packers mounted on mandrels. The valve system uses one or more valves to permit, through the use of seals, the flow of fluid from the interior of a tubular mandrel to the interior of the inflatable packer when pressure applied in the mandrel exceeds at least a minimum pressure. The differential pressure across reciprocating seals is minimized through exposure of one or both sides, directly or indirectly, to the external pressure of the mandrel and packer, the exposure including the use of a check valve to permit flow from the exterior of the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.