Patent ID: 8448712
Filing Date: 2013-05-28
Classification: E21B

Abstract:
1. A tool for releaseably 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 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.