Outrigger arm displacement control mechanism and method

Details Outrigger arm displacement control mechanism and method Outrigger arm displacement control mechanism and method

E - Fixed Constructions

21

B

166/3

E21B 47/08 (2006.01) E21B 17/10 (2006.01) E21B 47/00 (2006.01) G01V 11/00 (2006.01)

Patent

CA 1203747

OUTRIGGER ARM DISPLACEMENT CONTROL MECHANISM Abstract of the Disclosure As the outrigger arms of a borehole logging tool are flexed inwardly and outwardly according to the diameter of the borehole opening through which they pass, the corresponding axial displacements of the ends of the arms are controlled to determine the axial positions of the arms relative to the tool. Specifically, as the arm ends move, they are caused to rotate by a cam mechanism. The stiffness of the arms causes the arm ends to rotate in unison, and the exact positions of the arms on the tool are then controlled by the differential movements of the arm ends in the cams.

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