Well surveying instrument sensor

Details Well surveying instrument sensor Well surveying instrument sensor

1978-12-06

1981-01-20

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

33313, E21B 47022

Patent

active

042454980

ABSTRACT:
A surveying instrument sensor which includes a gimbal supported for rotation within a casing, a torquer coupled to rotate the gimbal with a first two-axis flexure suspended gyro supported on the gimbal with its spin axis perpendicular to the axis of the gimbal and one of its sensitive axes aligned with the axis of the gimbal, a second two-axis flexure suspended gyro disposed on the gimbal with its spin axis alinged with the axis of the gimbal and having two sensitive axes outputs orthogonal thereto. The output of the first gyro is coupled to the torquer to form a gimbal stabilized loop and the outputs and torquing inputs of the second gimbal coupled into rate capture loops with output signals obtained from the rate captured loops permitting fast and accurate surveying of a well pipe.

REFERENCES:
patent: 3229533 (1966-01-01), Draper et al.
patent: 3242744 (1966-03-01), Fischel
patent: 3587175 (1971-06-01), Armistead
patent: 4071959 (1978-02-01), Russell et al.

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