Borehole survey apparatus utilizing accelerometers and probe joi

Details Borehole survey apparatus utilizing accelerometers and probe joi Borehole survey apparatus utilizing accelerometers and probe joi

1981-01-13

1983-08-23

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

33313, E21B 4700

Patent

active

043996922

ABSTRACT:
To provide for accurate determination of azimuth in a borehole survey apparatus, a downhole probe is provided with two or more sections connected by torsionally rigid, flexible joint assemblies with provisions for generating signals that represent the relative inclination and azimuth of one probe section from another. These signals are combined with inclination signals obtained from a set of accelerometers in one of the probe sections in a signal processing unit to generate signals that represent the direction and depth of the borehole.

REFERENCES:
patent: 3545266 (1970-12-01), Wilson
patent: 3571937 (1971-03-01), Sears
patent: 3587175 (1971-06-01), Armistead
patent: 3789511 (1974-02-01), Groom et al.
patent: 3862499 (1975-01-01), Isham et al.
patent: 4047430 (1977-09-01), Angehrn

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