Patent ID: 6957704

Claim:
A method of securing a tool to a pipe, the method comprising: forming a groove in an exterior surface of the pipe, wherein the groove comprises a bottom and at least one stop; positioning a block in the groove so that a base of the block fits in the groove to contact the at least one stop and a flange of the block extends out of the groove; locking the block in the groove with a lock ring which encircles the block and the pipe and engages the flange of the block, wherein the locking comprises moving at least a portion of the lock ring over at least a portion of the block, elastically stretching at least a portion of the lock ring as it moves over at least a portion of the block, and then rebounding the stretched portion of the lock ring; and mounting the tool on the pipe so as to be retained by a member of a group consisting of the block and the lock ring.