Plural coil induction device and method for determining in a bor

Details Plural coil induction device and method for determining in a bor Plural coil induction device and method for determining in a bor

1989-07-10

1990-11-20

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324343, G01V 328, G01V 338

Patent

active

049721500

ABSTRACT:
The invention relates to a device for the determination, in a borehole, of the slope and of the azimuth of a discontinuity layer in a homogeneous terrain. It includes three emitting induction coils (1a, 1b, 1c) and three receiving induction coils (2a, 2b, 2c), means for supplying each of the emitting coils with alternating electric current, means for measuring the responses of each of the receiving coils and for isolating in each of the three responses the part resulting from the excitation of each of the emitting coils, and means (7) for deducing from the parameters thus obtained the slope and the azimuth of a layer crossed by the device.

REFERENCES:
patent: 3187252 (1965-06-01), Hungerford
patent: 3259837 (1966-07-01), Oshry
patent: 3609521 (1971-09-01), Desbrandes
patent: 3808520 (1974-04-01), Runge
patent: 4019126 (1977-04-01), Meador
patent: 4360777 (1982-11-01), Segesman

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