Boots – shoes – and leggings
Patent
1986-07-30
1989-01-03
Smith, Jerry
Boots, shoes, and leggings
324368, 731515, G01R 2702, G01V 320
Patent
active
047961864
ABSTRACT:
Methods and apparatuses for determining conductivity of a subterranean formation traversed by a well, particularly a cased well are provided. Variations in casing conductivity and/or electrode placement, arising from, e.g. thermal stress or expansion or corrosion, are compensated for. Compensation involves obtaining voltages developed in response to current flowing between relatively closely spaced current electrodes, and using these voltages to provide compensation for voltages developed in response to current flowing between more remotely positioned current electrodes. Modifications are described to permit conductivity measurements in partially cased or uncased wells, or wells being actively drilled.
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Douglas W. Hilchie, Applied Openhole Log Interpretation, pp. 11-1 to 11-4.
Oil Logging Research, Inc.
Smith Jerry
Tbui Kim Thanh
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