发明名称 |
Relative drill bit direction measurement |
摘要 |
Apparatus and Methods are disclosed for determining the direction between a rotating magnetic field and alternating magnetic field sensors at a remote location. The curvature of a borehole drilling assembly between a rotating drill bit carrying a permanent magnet and sensors behind a drilling motor is measured to provide early indication of changes in drilling direction. A second application concerns measurement of the convergence and divergence and the skewness of two approximately parallel well bores to provide information for correcting the drilling direction to maintain parallelism. A third application measures the direction and distance to a point target to provide data for guiding drilling toward that target. The primary apparatus are an oriented, rotating permanent magnet and an oriented, three component alternating magnetic field sensor.
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申请公布号 |
US6736222(B2) |
申请公布日期 |
2004.05.18 |
申请号 |
US20020112860 |
申请日期 |
2002.04.02 |
申请人 |
VECTOR MAGNETICS, LLC |
发明人 |
KUCKES ARTHUR F.;PITZER RAHN G.;NEKUT ANTHONY G. |
分类号 |
E21B7/06;E21B7/08;E21B47/024;(IPC1-7):E21B47/024 |
主分类号 |
E21B7/06 |
代理机构 |
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代理人 |
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地址 |
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