Patent ID: 8678108

Claim:
An apparatus for drilling a well with a casing string, comprising: a bottom hole assembly having an upper portion for mounting in the casing string with a lower portion protruding from a lower end of the casing string, the bottom hole assembly having a drilling tool for drilling the well; a mandrel coupled to the upper portion of the bottom hole assembly; an elastomeric sleeve encircling the mandrel; a setting mechanism that moves the sleeve relative to the mandrel from an unset position to a set position in frictional engagement with the casing string and the mandrel to transmit torque and axial load between the bottom hole assembly and the casing string, wherein the setting mechanism has a retainer that selectively holds the sleeve in the set position; and a release device in cooperative engagement with the sleeve and the mandrel that selectively allows the sleeve to move from the set position back to the unset position, wherein the release device operates in response to the landing of a sealing object pumped from a drilling rig down to the release device.