E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/01 (2006.01) E21B 17/10 (2006.01) E21B 23/00 (2006.01) E21B 23/14 (2006.01) E21B 36/04 (2006.01)
Patent
CA 2256102
An apparatus for orienting a downhole tool relative to a borehole. The invention comprises a phase change material such as a shape memory metal engaged with the tool in an initial position which is activatable to move into an operating position relative to the tool. An actuator activates the phase change material to orient the tool relative to the borehole. The member is engaged with said housing and with the phase change material for selective movement relative to said housing between an initial position and an operating position. The actuator activates said phase change material to move said member. A return spring can move the phase change material to or from the initial position. The invention can be combined with a logging tool or other downhole device to orient the tool within a borehole. In different applications, the invention can center the tool or urge the tool against one side of the borehole wall.
Cassan Maclean
Western Atlas International Inc.
LandOfFree
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