发明名称 |
METHOD AND APPARATUS FOR IMPROVED CURRENT FOCUSING IN GALVANIC RESISTIVITY MEASUREMENT TOOLS |
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 contact impedance. |
申请公布号 |
EA011107(B1) |
申请公布日期 |
2008.12.30 |
申请号 |
EA20070002232 |
申请日期 |
2006.04.11 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
GOREK MATHIAS;FOLBERTH MARTIN;FULDA CHRISTIAN |
分类号 |
G01V3/20 |
主分类号 |
G01V3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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