Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-05-25
1978-08-15
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 85, G01V 318, G01V 312
Patent
active
041075986
ABSTRACT:
A system operating at radio frequencies in the range of 10 MHZ to 60 MHZ is provided for simultaneously determining the resistivity and dielectric constant of earth formations in the vicinity of a well bore. A transmitter coil and two longitudinally spaced receiver coils are provided in the system. Circuit means for measuring the unnormalized amplitude ratio and the relative phase shift of electromagnetic waves at the spaced receiver coils are provided. A relationship is given whereby the formation dielectric constant and resistivity may be obtained from the amplitude ratio and relative phase shift measurements.
REFERENCES:
patent: 2900595 (1959-08-01), Mengel et al.
patent: 3900879 (1975-08-01), Lewinter
patent: 3944910 (1976-03-01), Rau
patent: 3993944 (1976-11-01), Meador et al.
patent: 4012689 (1977-03-01), Cox et al.
Adams Larry L.
Cox Percy T.
Fuchs James A.
Meador Richard A.
Thompson Larry W.
Beard William J.
Ries Carl G.
Strecker Gerard R.
Texaco Inc.
Whaley Thomas H.
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