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US 2009/0260822 A1Published application
Backoff sub and method for remotely backing off a target joint
AssigneeBaker Hughes Incorporated
InventorsCARL W. STOESZ, TERRY R. BUSSEAR
Life of this patent
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Abstract
A backoff sub includes a housing; and a backoff facilitator at least partially within the housing and capable of adding energy to a system within which the sub is disposable and method.
Claims21
A backoff sub comprising:
- a housing;
- and
- a backoff facilitator at least partially within the housing and capable of adding energy to a system within which the sub is disposable.
A well system comprising:
- a string having a plurality of joints at least one of the joints being addressable from a remote location;
- and
- one or more backoff subs each disposed at one of the plurality of joints and capable of producing one or more of a jarring action and a backoff torque action.
A method for managing a stuck string in a wellbore comprising:
- determining a freepoint of the string;
- addressing a backoff sub nearest and uphole of the determined freepoint;
- and
- activating a backoff facilitator in the backoff sub.
1 more element
Dependencies are inferred from the claim text.