Torque transmitting elastomeric element in casing drilling drill lock assembly

An apparatus for drilling a well with a casing string, comprising:

• a profile sub having an interior profile shoulder, the profile sub securing into and forming part of the casing string;
• a bottom hole assembly that is run into and retrievable from the casing string, the bottom hole assembly having an underreamer;
• a stop member carried by the bottom hole assembly that lands on the profile shoulder and stops downward movement of the bottom hole assembly, positioning the underreamer below the casing string;
• a mandrel coupled to the bottom hole assembly;
• an elastomeric sleeve encircling the mandrel;
• a setting ring in engagement with an upper end of the sleeve;
• a running tool releasably coupled to the mandrel that selectively moves the setting ring downward relative to the mandrel to a lower position to deform the sleeve into frictional engagement with the casing string and the mandrel to transmit torque and axial load between the bottom hole assembly and the casing string;
• a retainer cooperatively in engagement with the setting ring and the mandrel to hold the setting ring in the lower position, allowing the running tool to be retrieved;
• a release device in cooperative engagement with the mandrel and the setting ring that selectively allows the mandrel and the setting ring to move upward in unison relative to the sleeve while the setting ring is in the lower position to disengage the sleeve from frictional engagement with the casing string and retrieve the bottom hole assembly.

A method for drilling a well, comprising:

• (a) mounting an elastomeric sleeve to a bottom hole assembly having a drilling tool;
• (b) lowering the bottom hole assembly into a casing string suspended in the well;
• (c) stopping downward movement of the bottom hole assembly at a selected point with the drilling tool below the casing string and the elastomeric sleeve within the casing string;
• then
• (d) deforming the elastomeric sleeve into a setting position in tight frictional engagement with the casing string;
• and then
• (e) engaging the bottom of the well with the drilling tool and rotating the casing string, transmitting torque from the rotating casing string through the elastomeric sleeve to the bottom hole assembly and the drilling tool.