发明名称 |
SHORT NORMAL ELECTRICAL MEASUREMENT USING AN ELECTROMAGNETIC TRANSMITTER |
摘要 |
A method of drilling a wellbore is disclosed in which an electromagnetic signal is transmitted from a gap sub on a bottomhole assembly of a measurement- while drilling device into an earth formation. A related signal strength is measured at a surface location. Contact of a drill bit of the BHA with a new formation is estimated from a variation of the measured signal strength. |
申请公布号 |
WO2009035979(A1) |
申请公布日期 |
2009.03.19 |
申请号 |
WO2008US75728 |
申请日期 |
2008.09.09 |
申请人 |
BAKER HUGHES INCORPORATED;PETER, ANDREAS |
发明人 |
PETER, ANDREAS |
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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