Backoff sub and method for remotely backing off a target joint

Details Backoff sub and method for remotely backing off a target joint Backoff sub and method for remotely backing off a target joint

2011-07-19

2011-07-19

Gay, Jennifer H (Department: 3676)

Wells

Processes

Freeing stuck object, grappling or fishing in well

C166S178000, C166S299000, C166S063000

Reexamination Certificate

active

07980310

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.

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patent: 2009/0283322 (2009-11-01), Dove
Smith Services; “Safety Joints”; Retrieved from the Internet on Jun. 17, 2008; http://www.siismithservices.com/b—products/product—page.asp?ID-560; 2 pages.
Halliburton Auxiliary Services; “Releasable Wireline Cable Head (RWCH)”; 2003; pp. 143-154.

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