Wells – Expansible anchor or casing – Fluid pressure actuated
Patent
1996-05-30
1998-08-18
Neuder, William P.
Wells
Expansible anchor or casing
Fluid pressure actuated
166319, E21B 2300
Patent
active
057946949
ABSTRACT:
A running tool particularly useful for running liners on coiled tubing is disclosed. A torque-transmitting outer sleeve is employed which initially traps the collets. The collets are engaged to the liner by relative mechanical movement and thereafter lock in a secured position to the liner, regardless of whether the liner is placed in tension or compression by the running tool. Release is accomplished by letting down weight on the running tool, coupled with hydraulic pressure to shear a pin securing the collet mechanism. Upon such a hydraulic release with the pin sheared, the outer torque sleeve shifts downwardly to prevent relatching. Torque is transmitted through the outer torque sleeved and not through the latching collets. A snap ring can optionally be inserted to further ensure that the tool will not relatch after release. If, for any reason, the tool does not release in the normal manner, a twist off release feature is provided.
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Baker Hughes Incorporated
Neuder William P.
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