Coherent detection system for use in induction well logging appa

Details Coherent detection system for use in induction well logging appa Coherent detection system for use in induction well logging appa

1986-05-21

1988-04-12

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324 79R, G01V 328

Patent

active

047377194

ABSTRACT:
In an induction logging system supported on a sonde, an improved received signal processing system is disclosed. The sonde supports transmitting and receiving coils. The transmitter sends pulses at a frequency F.sub.1, normally 20 kilohertz. The receiver includes a frequency multiplier circuit driven with a frequency F.sub.2. The multiplier forms an output to a phase sensitive detector driven by a gating signal F.sub.3 where F.sub.3 =F.sub.1 -F.sub.2. This reduces error arising in the receiver.

REFERENCES:
patent: 3150314 (1984-09-01), Tanguy
patent: 3179879 (1965-04-01), Tanguy
patent: 3496455 (1970-02-01), Gouilloud
patent: 3706025 (1972-12-01), Regat
patent: 3978403 (1976-08-01), Mansfield et al.
patent: 4069462 (1978-01-01), Dunn
patent: 4070612 (1978-01-01), McNeill et al.
patent: 4086544 (1978-04-01), Fried
patent: 4302722 (1981-11-01), Gianzero
patent: 4604581 (1986-08-01), Thadani et al.
patent: 4611173 (1986-09-01), Bravenec et al.

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