Logging method and apparatus using a rotating sensor

Details Logging method and apparatus using a rotating sensor Logging method and apparatus using a rotating sensor

G - Physics

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G01V 1/40 (2006.01) E21B 47/00 (2006.01) G01N 29/30 (2006.01) G01V 1/46 (2006.01) G01V 13/00 (2006.01)

Patent

CA 2011437

Logging equipment for use in a borehole has a sensor such as an ultrasonic sensor, oriented radially towards the wall of the borehole and rotatable in one direction during measurement about the longitudinal axis (XX) of the equipment. In order to allow the sensor to be recalibrated downhole, the equipment also includes a target which is automatically brought face to face with the sensor upon reversal of the direction of rotation of the sensor. The sensor can thus be calibrated under conditions which are as close as possible to the conditions of measurement.

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