Induction logging sonde with metallic support

Details Induction logging sonde with metallic support Induction logging sonde with metallic support

1985-04-03

1987-03-17

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

G01V 328

Patent

active

046511016

ABSTRACT:
Induction logging sonde including transmitter and receiver solenoid coils mounted on a support and axially separated from each other. The support is made of conductive material and comprises at least one first longitudinal portion for mounting the coils and second longitudinal portions on each side of the first portion. At least the first portion has a substantially continuous and axisymmetric outer surface so as to favor the flow of eddy currents around the surface, whereby the electric field on that surface is substantially cancelled.

REFERENCES:
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patent: 3214686 (1965-10-01), Elliot et al.
patent: 3249858 (1966-05-01), Gouilloud
patent: 3305771 (1967-02-01), Arps
patent: 3408561 (1968-10-01), Redwine et al.
patent: 3417325 (1968-12-01), McCullough et al.
patent: 3534256 (1970-10-01), Johnson
patent: 4511843 (1985-04-01), Thoraval
patent: 4536714 (1985-08-01), Clark
patent: 4553097 (1985-11-01), Clark
patent: 4603297 (1986-07-01), Safinya
Rodney et al, "The Electromagnetic Wave Resistivity Tool", SPE publication 12167, Oct. 1983, pp. 1-11.

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