Selectively fired high pressure high temperature back-off tool
US8851191B2 · kind B2 · utility
2Cited by
14References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2011 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Dec 18, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for unseating a threaded connection of wellbore tubing within the wellbore. The method utilizes a back-off tool which consists of a tubular metal housing, a shaped charge and HNS detonating cord within the housing, and an explosive material attached to the housing. The back-off tool is detonated near the threaded connection, creating a shockwave that strikes the threaded connection with sufficient force to unseat the connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.