Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1981-06-08
1985-02-12
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
364422, G01V 328
Patent
active
044994222
ABSTRACT:
A digital induction resistivity logging tool is disclosed for digitally measuring both the in-phase (R) and quadrature (X) phase components in a receiver signal generated in response to induce eddy currents flowing in the earth's sub-surface formations. The digital induction tool includes a digital sinewave generator for generating a highly phase stable, low distortion transmitter signal to a transmitter coil. One phase sensitive detector is used to detect both the R and the X phase component signals in the receiver signal. Automatic phase compensation is included to compensate for both static phase shift errors and periodically to compensate for temperature dependent phase shift errors, both static and temperature errors being introduced by circuits of the tool.
REFERENCES:
patent: 3020470 (1962-02-01), Shawhan et al.
patent: 3056917 (1962-10-01), Tanguy
patent: 3147429 (1964-09-01), Moran
patent: 3150314 (1964-09-01), Tanguy
patent: 3179879 (1965-04-01), Tanguy
patent: 3340464 (1967-09-01), Gouilloud
patent: 3471772 (1969-10-01), Smith
patent: 3496455 (1970-02-01), Gouilloud
patent: 4024468 (1977-05-01), Hirschi
patent: 4059795 (1977-11-01), Mordwinken
patent: 4207520 (1980-06-01), Flora et al.
patent: 4230987 (1980-10-01), Mordwinken
patent: 4249128 (1981-02-01), Karbowski
patent: 4303885 (1981-12-01), Davis et al.
patent: 4322683 (1982-03-01), Vieira et al.
patent: 4326166 (1982-04-01), Pigeon et al.
patent: 4344034 (1982-08-01), Randolph
Schlumberger Technology Corporation
Strecker Gerard R.
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