Impedance analysis for fluid discrimination and monitoring
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United States of America Patent
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Oct 2, 2018
Grant Date -
Mar 30, 2017
app pub date -
Jun 23, 2014
filing date -
Jun 23, 2014
priority date (Note) -
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Abstract
An apparatus and method may operate to mount one or more communication assemblies relative to the exterior of a casing being placed in a borehole. Each communication assembly is configured to cause electrodes of a fluid sensing assembly to inject currents into fluids in one or more regions of the annulus surrounding the casing, and to obtain excitation responses from electrodes of the fluid sensing assembly, where the excitation responses vary based on electrical properties of fluids in one or more regions of the annulus surrounding the casing. Control is provided to control which electrodes of the fluid sensing assembly will inject currents and generate excitation responses and to control which electrodes of the fluid sensing assembly will sense the currents. Additional apparatus, systems, and methods are disclosed.
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