Packer valve arrangement
US4420159A · kind A · utility
16Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1982 |
| Grant date | Dec 13, 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 is disclosed. The valve system uses one or more valves to permit, through the use of seals, the flow of fluid form 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. In two embodiments, inflation of the packer beyond a given pressure is prevented. In all embodiments, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.