发明名称 |
Method for locating casing downhole using offset XY magnetometers |
摘要 |
An apparatus, method and computer-readable medium for locating a joint of a casing disposed in a borehole are disclosed. The apparatus includes a sensor oriented in a plane orthogonal to a longitudinal axis of the casing. The sensor measures a magnetic field induced in the casing by the earth's magnetic field. A tool conveys the sensor through the casing along a path that is radially offset from a longitudinal axis of the casing. Transverse magnetic field measurements are obtained by the sensor at a plurality of depths along the casing. A change in the transverse measurements is identified and used to determine the location of the casing joint. |
申请公布号 |
GB2534701(A) |
申请公布日期 |
2016.08.03 |
申请号 |
GB20160002133 |
申请日期 |
2014.06.16 |
申请人 |
Baker Hughes Incorporated |
发明人 |
Francis Chad Hanak;Martin Blanz |
分类号 |
E21B47/092;G01V3/26 |
主分类号 |
E21B47/092 |
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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