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    • 2. 发明申请
    • DETECTOR
    • 探测器
    • US20080150521A1
    • 2008-06-26
    • US11613877
    • 2006-12-20
    • Gerald MeetenMichael Paul Barrett
    • Gerald MeetenMichael Paul Barrett
    • G01N27/82
    • G01N27/72
    • A casing position locator for detecting structural features of a borehole casing, the locator including: a plurality of field generators for generating respective dynamic magnetic fields which combine in use to provide a dynamic test magnetic field to interact with the casing, wherein the test field includes a magnetic field null point where the respective dynamic magnetic fields substantially cancel each other out; and a sensor for detecting in use a change in the position of the null point, relative to the sensor, due to said interaction.
    • 一种用于检测钻孔套管的结构特征的壳体位置定位器,所述定位器包括:多个场发生器,用于产生相应的动态磁场,其在使用中组合以提供动态测试磁场以与所述壳体相互作用,其中所述测试场包括 其中各个动态磁场基本相互抵消的磁场零点; 以及传感器,用于在使用中由于所述相互作用而相对于传感器检测零点的位置的变化。
    • 9. 发明授权
    • Detector
    • 探测器
    • US07622916B2
    • 2009-11-24
    • US11613877
    • 2006-12-20
    • Gerald MeetenMichael Paul Barrett
    • Gerald MeetenMichael Paul Barrett
    • G01N27/83
    • G01N27/72
    • A casing position locator for detecting structural features of a borehole casing, the locator including: a plurality of field generators for generating respective dynamic magnetic fields which combine to provide a dynamic test magnetic field to interact with the casing, where the test field includes a magnetic field null point located where the respective dynamic magnetic fields substantially cancel each other out; and a sensor for detecting a change in the position of the null point, relative to the sensor, due to the interaction.
    • 一种用于检测井眼壳体的结构特征的壳体位置定位器,所述定位器包括:多个场发生器,用于产生相应的动态磁场,其结合以提供动态测试磁场以与壳体相互作用,其中所述测试场包括磁 位于相应的动态磁场基本上相互抵消的场零点; 以及用于由于相互作用而相对于传感器检测零点的位置的变化的传感器。