发明名称 |
Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor |
摘要 |
Earth formation evaluation for detection of hydrocarbon fluids is carried out by a microwave frequency range sensor (antenna or wave guide) disposed in the face of a diamond or PDC drill bit configured to minimize invasion of drilling fluid into the formation ahead of the bit. The sensor is connected to an instrument disposed in a sub interposed in the drill stem for generating and measuring the alteration of microwave energy. In particular, the dielectric constant of the earth formation in a zone which is substantially uninvaded by drilling fluid may be detected and compared with density and/or porosity logs to determine the presence of hydrocarbons in relatively thin layers of formation material.
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申请公布号 |
US5475309(A) |
申请公布日期 |
1995.12.12 |
申请号 |
US19940184795 |
申请日期 |
1994.01.21 |
申请人 |
ATLANTIC RICHFIELD COMPANY |
发明人 |
HONG, HARRY T.;KATAHARA, KEITH W. |
分类号 |
E21B10/60;E21B47/01;E21B49/00;G01V3/30;(IPC1-7):G01V3/30;E21B47/12;E21B47/14;G01V5/04 |
主分类号 |
E21B10/60 |
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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