High pressure retrievable gravel packing apparatus
US4611658A · kind A · utility
52Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1984 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Sep 26, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1216
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A retrievable well packer and gravel packing system employing a multi-component packing element system is disclosed. The packing element system is expandable under axial compression to seal the annulus between a production or treatment tubing string and the well casing. The packing element system includes outer elastically deformable anti-extrusion backup rings and a central primary seal. A resilient member conformable to the surrounding countour, such as wire mesh, is employed between the central primary seal and each backup ring to allow retraction of the backup rings for retrieval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.