Electromagnetic source integrated into an element of a well casing
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United States of America Patent
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Aug 3, 1993
Grant Date -
N/A
app pub date -
Oct 31, 1990
filing date -
Nov 15, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Electromagnetic source intended to be placed permanently in a drill well for studying the electromagnetic properties of the geological formations or of the fluids surrounding the well. This source consists of a coil through which a high current is circulated and which is of a diameter of the order of magnitude of the diameter of the well and is integrated in one of the elements of the casing produced at least partially from a resistant material in which the coil is embedded. This source can either be activated directly by a conductor shoe moving along in the well or be connected to a supply by means of cables.
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