Patent ID: 8443905

Claim:
A tool for releasably coupling a first tubing to a second tubing in a wellbore, the tool comprising: a tubular mandrel configured to couple to and be carried into the wellbore by the first tubing; a collet ring in an interior of the mandrel and comprising a plurality of collets that extend from the interior of the mandrel to an exterior of the mandrel through a plurality of openings in the mandrel, the collet ring carried in the interior of the mandrel to axially translate between: a locked position where the collets are supported radially outward by the mandrel to engage the second tubing thereby coupling the first and second tubing, the second tubing comprising an expandable liner hanger and the collets engage a profile of the second tubing used by an expander tool in radially plastically deforming the liner hanger to an expanded state where the liner hanger engages a wall of the wellbore; and a released position where the collets are unsupported and allowed to retract radially inward out of engagement with the second tubing and allow the first tubing to uncouple from the second tubing; and a releasing piston carried in the interior of the mandrel to translate axially between a supporting position supporting the collet ring in the released position and an unsupporting position allowing the collet ring to translate to the locked position, the releasing piston releasably retained in the unsupporting position until hydraulic pressure is applied against the releasing piston to move the releasing piston to the supporting position.