Drilling stabilizer including mechanical interlock and disengagement device

Abstract From the Canadian patent

A rigid stabilizer sleeve having outwardly extending ribs is slideably received over a drill collar. A pair of internal clamping rings are slideably received through each end of the rigid main sleeve. As a threaded end cap is threaded into the rigid main sleeve, the end cap forces one ring of the pair against the other thereby producing a clamping effect whereby the stabilizer can be clamped at any desired position on the drill collar. An outer ring of the pair of rings has a groove and a rib disposed on its interior cylindrical surface; the portion of the end cap received by the outer ring has a rib and a groove disposed upon its outer cylindrical surface. As the end cap receives the outer …