Downhole tool release mechanism
US5526884A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1995 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | May 5, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1295
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for releasing a downhole tool such as a packer is revealed which allows the tool to retain its set position against a very high loading force which can occur during operations such as perforating or acidizing or other formation treatments. Subsequently, before environmental conditions can adversely affect the integrity of the locking mechanism which employs a movable sleeve or equivalent, the release mechanism involving such a sleeve or equivalent is actuated. This disables one of the locking mechanisms on the tool and enables a shear-release mechanism, which is preferably set at a fairly low shear force to facilitate simple removal of the downhole tool at a later time when it becomes necessary to retrieve it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.