Backoff sub and method for remotely backing off a target joint
US7980310B2 · kind B2 · utility
2Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jul 24, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A backoff sub includes a housing and a backoff facilitator at least partially within the housing. The backoff sub is a part of the string that is stuck and is capable of adding energy to the string within which the sub is disposed to facilitate backing off of a portion of that sting close to a stuck point of that string. A method is included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.