Focused very high frequency induction logging

Details Focused very high frequency induction logging Focused very high frequency induction logging

1984-02-24

1986-12-02

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324341, G01V 328

Patent

active

046267859

ABSTRACT:
An improved very high frequency induction log is obtained using a tool having a focused transmitter source. The tool utilizes a second transmitter placed on the opposite side of the receivers from the first transmitter, the second transmitter being supplied with current to produce an opposite antenna current direction to the first transducer. The combination of the two transmitters serves to focus the current flow and increase the depth of investigation.

REFERENCES:
patent: 2264318 (1941-12-01), Lee
patent: 3305771 (1967-02-01), Arps
patent: 3539911 (1970-11-01), Youmans et al.
patent: 3849721 (1974-11-01), Calvert
patent: 4107597 (1978-08-01), Meador et al.
patent: 4107598 (1978-08-01), Meador et al.
patent: 4278941 (1981-07-01), Freedman
patent: 4494071 (1985-01-01), Fertl

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