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 |
EA014920(B1) |
申请公布日期 |
2011.04.29 |
申请号 |
EA20090000221 |
申请日期 |
2007.04.03 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
GOREK MATTHIAS;FULDA CHRISTIAN |
分类号 |
G01V3/00 |
主分类号 |
G01V3/00 |
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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