System for the measurement of electrical characteristics of geological formations from within steel cased wells using magnetic circuits
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United States of America Patent
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Sep 3, 2002
Grant Date -
N/A
app pub date -
Apr 10, 2000
filing date -
Apr 10, 2000
priority date (Note) -
Expired
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Abstract
A system for measuring magnetic fields outside a ferromagnetic container from inside the same container is described. The invention uses magneti circuits to direct the flow of magnetic flux to a magnetic field detector. By using magnetic fields for detection, this invention is able to measure the properties of magnetic materials outside the ferromagnetic container, such as a geologic formation, electric or magnetic parameters, or log well and drill holes that have been cased.
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