Hydraulic release running tool
a running tool and hydraulic technology, applied in the direction of drilling pipes, drilling casings, borehole/well accessories, etc., can solve the problems of non-trivial challenges and increased difficulty in relying on mechanical manipulation for running tools, and achieve the effect of avoiding accidental actuation of secondary mechanical release apparatus
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[0042] Running Tool
[0043] In one embodiment of the invention, and shown generally in FIG. 1a, running tool 5 is provided featuring hydraulic release with optional backup mechanical release and a uni-directional torque clutch that provides premature release protection by dampening anti-backlash and over-rotation as shown in FIG. 1b. Such features are applied in downhole operational circumstances, including for releasable coupling with and running in and release of a liner hanger (not shown). Running tools incorporating the present invention can be applied for releasable connection tubular portions of other downhole tools and to greatest effect with tools that would be rotated and released and preferably rotated once released. The preferred embodiment is described in the context of running in, release and rotation, such as during the process of cementing of a liner hanger.
[0044] The running tool 5, liner hanger and depending new liner are run downhole to a setting depth, typically w...
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