Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1994-12-07
1997-02-25
O'Shea, Sandra L.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
324239, 324225, G01V 326, G01N 2772, G01R 33025
Patent
active
056062605
ABSTRACT:
A microdevice is provided for measuring the electromagnetic characteristics of a medium in a borehole. The microdevice includes at least one emitting or transmitting coil (31), and at least one receiving coil (41,51). The microdevice generates an A.C. voltage at the terminals of the transmitting coil and measures a signal at the terminals of the receiving coil. The microdevice also includes an E-shaped electrically insulating, soft magnetic material circuit serving as a support for each of the coils and which is positioned adjacent to the medium in the borehole.
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Giordano Patrice
Glenat Henri
Ittel Jean-Michel
Locatelli Marcel
Commissariat a l''Energie Atomique
O'Shea Sandra L.
Phillips Roger
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