Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Patent
1986-04-04
1987-10-13
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
By magnetic means
33304, 166 665, 175 45, G01V 308, G01V 326, E21B 704, E21B 4702
Patent
active
047001429
ABSTRACT:
Logging apparatus for measuring alternating magnetic fields generated by electric current flow on a subterranean target near a borehole is disclosed. Electric current of a predetermined temporal form is made to flow on the target; the resulting magnetic field is measured by magnetometers in a downhole sonde. The orientation of the sonde is fixed by various combinations of gyroscope, accelerometer, magnetometer measurements, and borehole survey data.
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Strecker Gerard R.
Vector Magnetics Inc.
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