Wells – Processes – Freeing stuck object – grappling or fishing in well
Reexamination Certificate
2006-07-18
2006-07-18
Bates, Zakiya W. (Department: 3676)
Wells
Processes
Freeing stuck object, grappling or fishing in well
C166S098000, C166S099000, C166S178000, C166S320000, C166S386000
Reexamination Certificate
active
07077205
ABSTRACT:
A method of freeing stuck objects (16) from a bore (14) comprises running a string (12) into the bore (14), the string (12) including a flow modifier, such as a valve, for producing variations in the flow of fluid through the string, and a device for location in the string and adapted to axially extend or contract in response to variations in the flow of fluid through the string. A portion of the string (12) engages the stuck object (16). Fluid is then passed through the string while applying tension to the string, whereby the tension applied to the stuck object varies in response to the operation of the flow modifier and the extending or retracting device.
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Alston & Bird LLP
Andergauge Limited
Bates Zakiya W.
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