Borehole seismic receiver

Details Borehole seismic receiver Borehole seismic receiver

G - Physics

01

V

349/10, 324/12,

G01V 1/40 (2006.01) E21B 23/01 (2006.01) G01V 1/52 (2006.01) G01V 11/00 (2006.01)

Patent

CA 1274014

ABSTRACT BOREHOLE SEISMIC RECEIVER A seismic receiver is provided for measuring seismic signals transmitted through the earth and received in a well borehole. A reversible electrical motor drives a harmonic drive reducer which amplifies the torque provided to drive a ball screw. The ball screw moves linearly along the axis of the well borehole to control the extension of a clamp arm into and out of an extended position in contact with subsurface earth adjacent the well borehole. A releasable electric clutch is provided so the receiver is retrievable in the event of a power failure while the clamp arm is extended. 43024/5/1-1-1/900

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