Subterranean well tool including a locking seal healing system
US7779905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Jun 6, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1285
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well tool with multi-stage remedial system improves the durability of a subterranean well tool having an expanded elastomeric member, such as a packer, for use inside a tubular member. The well tool with multi-stage remedial system has a plurality of mandrel members shiftable within the tubular member for anchoring and for setting the seal system. A floating tandem mounted annularly around the lower mandrel members has one end (upon shifting) proximate an end of the seal system, and the floating tandem has an opening to ambient bottom-hole-pressure of the subterranean well. A locking tandem is interposed with the floating tandem and at least one of the lower mandrel members. The floating tandem and the locking tandem together assist in abating elastomeric member extrusion under high temperature, high pressure environments as well as other conditions lending to failure within the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.