High speed well surveying and land navigation

Details High speed well surveying and land navigation High speed well surveying and land navigation

G - Physics

01

C

354/25, 343/72

G01C 21/16 (2006.01) E21B 47/022 (2006.01)

Patent

CA 1325476

HIGH SPEED WELL SURVEYING AND LAND NAVIGATION ABSTRACT OF THE DISCLOSURE Land vehicle navigation apparatus combining a) inertial angular rate sensor structure having a sensitive axis, b) inertial acceleration or tilt sensor structure having at least two sensitive axes, these sensitive axes (having a known relationship) to the inertial angular rate sensor's sensitive axis, c) circuitry to accept from an external source an initial input value (or self initialization, by rotary multiple positioning) of the vehicle's azimuthal orientation angles, roll, pitch, and aximuth, with respect to an Earth- fixed coordinate set as the land vehicle travels over the Earth surface, and wherein changes to the azimuth angle during travel are determined by integration of the output of the a) sensor.

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