Wells – Processes – Freeing stuck object – grappling or fishing in well
Reexamination Certificate
2007-09-04
2007-09-04
Bagnell, David (Department: 3672)
Wells
Processes
Freeing stuck object, grappling or fishing in well
C166S177200, C166S177600
Reexamination Certificate
active
11153822
ABSTRACT:
An apparatus for applying a force to a stuck object in a wellbore that includes a work string extending in the wellbore is provided. A vibrating string has a vibrator engaged with the stuck object. The vibrator drives the vibrating string to impart the force to the stuck object. An isolator associated with the work string and the vibrating string decouples a portion of a motion of the vibrating string from the work string. A method of applying a force to a stuck object in a wellbore is provided that includes comprises extending a work string in the wellbore from a surface location. A vibrating string is engaged with the stuck object. The vibrating string is driven at a frequency to apply the force to the stuck object. The work string is isolated from the vibrating string such that a portion of the motion of the vibrating string is decoupled from the work string.
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Mody Rustom K.
Soni Mohan L.
Stoesz Carl W.
Bagnell David
Baker Hughes Incorporated
Collins Giovanna M
Maden Mossman & Sriram PC
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