Importance

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Abstract

A hydraulic running and release tool includes a mandrel, outer sleeve, latch nut and piston which may be hydraulically or mechanically actuated to release the tool from a tubular member after it has been positined in a well bore. The latch nut and piston are releasably connected together by a shear member between the outer sleeve and the mandrel and the latch nut is releasably connected to a tubular member, with the piston positioned adjacent the releasable connection between the latch nut and tubular member to prevent premature disconnection of the latch nut from the tubular member. To release the hydraulic tool, fluid pressure through a port in the mandrel from the well string acts on the piston to shear the member that connects the piston to the latch nut so that the piston shifts away from the releasable connection. After the piston is shifted hydraulically, it reconnects to the latch nut whereupon the piston and latch nut may hydraulically thereafter by shifted longitudinally together to disconnect the latch nut from the tubular member for retrieval of the tool including the mandrel, outer sleeve, latch nut and piston from the well bore. If a malfunction occurs with the hydraulic release, rotation may be imparted to the mandrel which is in turn imparted to the latch nut by engaged splines on the mandrel and latch nut for rotating the latch nut to disconnect it from the tubular member for retrieval of the tool including the outer sleeve, mandrel, latch nut and piston from the well bore.

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First Claim