发明名称 |
DOWNHOLE MAGNETIC-FIELD BASED FEATURE DETECTOR |
摘要 |
An apparatus that is usable with a subterranean well includes a magnetometer and a circuit. The magnetometer indicates a strength of a magnetic field that at least partially extends through a portion of a downhole pipe. The circuit is coupled to the magnetometer to indicate a feature present in the pipe based on the indication from the magnetometer.
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申请公布号 |
CA2412273(C) |
申请公布日期 |
2006.10.03 |
申请号 |
CA20022412273 |
申请日期 |
2002.11.21 |
申请人 |
SCHLUMBERGER CANADA LIMITED |
发明人 |
ALMAGUER, JAMES S. |
分类号 |
E21B47/12;E21B47/09;G01N27/82;G01V3/26 |
主分类号 |
E21B47/12 |
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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