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METHOD AND APPARATUS FOR IMPROVED CURRENT FOCUSING IN GALVANIC RESISTIVITY MEASUREMENT TOOLS FOR WIRELINE AND MEASUREMENT-WHILE DRILLING APPLICATIONS
METHOD AND APPARATUS FOR IMPROVED CURRENT FOCUSING IN GALVANIC RESISTIVITY MEASUREMENT TOOLS FOR WIRELINE AND MEASUREMENT-WHILE DRILLING APPLICATIONS
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机译:用于电缆和测量的电钻电阻率测量工具中改进的电流聚焦的方法和装置
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摘要
A galvanic resistivity tool with one or more measurement electrodes and guard electrodes, and one or more shielding electrodes. The potential difference between the measurement electrodes and the guard electrodes is controlled to minimize current flow between the measurement electrodes and the shielding electrodes. This provides improved focusing and avoids effects of con tact impedance.
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