发明名称 |
METHOD AND APPARATUS FOR DETERMINING FORMATION RESISTIVITY AHEAD OF THE BIT AND AZIMUTHAL AT THE BIT |
摘要 |
A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses the drillbit and the adjacent portion of the drill collar as a focusing electrode for focusing the measure current from a measure electrode on the face or side of the drillbit. This provides the ability to see ahead of and azimuthally around the drillbit. |
申请公布号 |
EP2005217(B1) |
申请公布日期 |
2014.05.21 |
申请号 |
EP20070754573 |
申请日期 |
2007.04.03 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
GOREK, MATTHIAS;FULDA, CHRISTIAN |
分类号 |
G01V3/22;E21B47/01;E21B47/10 |
主分类号 |
G01V3/22 |
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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