Isolation gravel packer
US4295524A · kind A · utility
26Cited by
10References
57Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Dec 27, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for gravel packing a producing formation or zone in a well without inducing fluid movement across the zone being packed during reverse circulation. Packing and reverse circulation are effected without any movement of the tool string from the time packing is initiated. Bypass and dump valves are incorporated in the isolation gravel packer to facilitate movement of the tool string within the well bore before and after packing a zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.