System and method for unsticking a tool stuck in a wellbore
US7661477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Jun 2, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An unsticking assembly for releasing a tool that is stuck in a wellbore including a first anchor actuatable between an engaging position wherein the first anchor engages a wall of the wellbore and a retracted position wherein the first anchor does not engage the wall; a second anchor actuatable between an engaging position wherein the second anchor engages a wall of the wellbore and a retracted position wherein the second anchor does not engage the wall; and a control module in connection with the first and second anchor to selectively actuate each anchor between the engaged and retracted positions. The assembly is adapted for positioning in the wellbore and in connection with the tool when the tool is stuck in the wellbore. The assembly may be a stand-alone assembly that is connectable to the tool after the tool is stuck in the wellbore. The assembly may include the wellbore tool as an interconnected element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.