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 |
WO2015009373(A1) |
申请公布日期 |
2015.01.22 |
申请号 |
WO2014US42524 |
申请日期 |
2014.06.16 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
HANAK, FRANCIS CHAD;BLANZ, MARTIN |
分类号 |
E21B47/09;G01V3/18 |
主分类号 |
E21B47/09 |
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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