Isolation tool release mechanism
US6167970A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1998 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Apr 30, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/142
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A release mechanism for use with setting wellbore isolation tools, such as packers or bridge plugs. The release mechanism typically includes a release piston which selectively isolates equalization ports extending from the interior to the exterior of a setting tool body. The release piston may be activated to allow equalization of pressure across the sealing elements of a set isolation tool, typically by applying pressure to the annular space above the isolation tool. The release mechanism may be used to allow a tool body (such as a setting or retrieving tool) to be removed from a set isolation tool under conditions in which high pressure differential exists across the isolation tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.