Magnetic probe exploration device for determining residual fossi

Details Magnetic probe exploration device for determining residual fossi Magnetic probe exploration device for determining residual fossi

1985-05-08

1987-02-24

Karlsen, Ernest F.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

By magnetic means

324248, 324340, G01U 326, G01R 33035

Patent

active

046460250

ABSTRACT:
Apparatus for continuously recording, as a function of the depth, the residual magnetization of the rocks through which a well hole passes, comprising, on the one hand, a measurement probe which contains means for measuring the magnetic susceptibility and the magnetic field and, in a cryostat, three gradiometers and, on the other hand, a processing unit which incorporates an integrator (81) for carrying out integration of the data from the gradiometers, a multiplier (76) for multiplying the magnetic field by the magnetic susceptibility, and a subtractor (83) for deducting this product from the result of the integration.

REFERENCES:
patent: 3391335 (1968-07-01), Patton et al.
patent: 4349781 (1982-09-01), Vozoff
patent: 4427943 (1984-01-01), Cloutier et al.

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