Method and apparatus for balancing the electrical output of the

Details Method and apparatus for balancing the electrical output of the Method and apparatus for balancing the electrical output of the

1994-03-01

1995-11-14

O'Shea, Sandra L.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

324239, G01V 310, G01N 2772

Patent

active

054670195

ABSTRACT:
In an induction logger, a method for nulling the output signal from a pair of series-coupled receiver coils by altering the magnetic flux distribution within the coils by use of one or more magnetic equalization bodies. The shape and aspect ratio of the equalization body are chosen to minimize temperature dependence of the initial permeability. Alternatively, a highly conductive equalization body may be used.

REFERENCES:
patent: 2779908 (1957-01-01), Martin
patent: 3051892 (1962-08-01), Huston
patent: 3742341 (1973-06-01), Clowes et al.
patent: 3882374 (1975-05-01), McDaniel
patent: 4873488 (1989-10-01), Barber et al.
patent: 4965522 (1990-10-01), Hazen et al.
patent: 5138263 (1992-08-01), Towle

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