Electricity: measuring and testing – Of subsurface core sample
Patent
1983-03-11
1985-10-08
Strecker, Gerard R.
Electricity: measuring and testing
Of subsurface core sample
323280, 324 64, G01R 2708, G01N 2704, G01V 306, G05F 112
Patent
active
045463182
ABSTRACT:
A method and system for regulating current flow through a core sample from a subterranean formation being tested for electrical impedance, including a variable-frequency current source, means for passing such current through the core sample, means for measuring such current flow, and means for regulating the current flow through the core sample so that it is dependent upon the amplitude of the current flow from the current source and is independent of non-linear variations in core inpedance responsive to the current flow through the core sample.
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Frederiksen et al.; "Diode-feedback . . . regulates a LED's drive current",Electronic Design 6, vol. 25, Mar. 15, 1977, p. 108.
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Gilman Michael G.
Hager Jr. George W.
McKillop A. J.
Mobil Oil Corporation
Strecker Gerard R.
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