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US08972193B2 Formation resistivity imager with reduced leakage to mandrel 有权
形成电阻率成像仪,减少对心轴的泄漏

Formation resistivity imager with reduced leakage to mandrel
Abstract:
A method of estimating a parameter of a formation contacting a borehole with an instrument that includes a mandrel and a pad includes providing a measurement voltage to the pad; applying a biasing voltage to the mandrel while the measurement voltage is applied to the pad; measuring a received current during at least a portion of time the measurement voltage is provided; and estimating the parameter based on the received current.
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