E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/28
E21B 17/10 (2006.01) E21B 17/046 (2006.01) F16D 1/091 (2006.01) F16D 1/094 (2006.01)
Patent
CA 1079261
Abstract 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 ring, the rib and the groove of the end cap interlock with the groove and the rib respectively of the outer ring whereby when the end cap is threadedly removed from the rigid main sleeve, the outer ring follows the end cap and is disengaged from the inner ring, thereby unclamping the pair of rings from the drill collar.
312523
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