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    Method for calibrating current and magnetic fields across a drill collar
    2.
    发明授权
    Method for calibrating current and magnetic fields across a drill collar 有权
    校准钻铤上的电流和磁场的方法

    公开(公告)号：US09360581B2

    公开(公告)日：2016-06-07

    申请号：US13128506

    申请日：2009-11-17

    申请人： Brian Clark ,  Mark E. Flaum ,  Jan Morley ,  Jaideva Goswami ,  Miguel F. Pabon

    发明人： Brian Clark ,  Mark E. Flaum ,  Jan Morley ,  Jaideva Goswami ,  Miguel F. Pabon

    IPC分类号： G01V3/08 ,  G01V3/26 ,  E21B47/024

    CPC分类号： G01V3/26 ,  E21B47/024

    摘要： A method for drilling a well includes applying a current across a drill collar that surrounds an internal magnetometer. The current travels across the drill collar and along one or more other current paths to return to the drill collar. The method also includes using the magnetometer to measure magnetic fields due to the current being applied across the drill collar and the current across one or more other current paths while the drill collar is disposed at a first angle of rotation and rotating the drill collar to a second angle of rotation. The method further includes measuring the magnetic fields using the internal magnetometer while the drill collar is disposed at the second angle of rotation and determining a relationship between the current across the drill collar and a portion of the magnetic fields due to the current across the drill collar measurable by the internal magnetometer.

    摘要翻译： 用于钻井的方法包括在围绕内部磁力计的钻铤上施加电流。 电流穿过钻铤并且沿着一个或多个其它电流路径行进以返回钻铤。 该方法还包括使用磁力计来测量磁场，这是因为电流被施加在钻铤上的电流和跨过一个或多个其它电流路径的电流，同时钻铤设置在第一旋转角度并将钻铤旋转到 第二个旋转角度。 该方法还包括使用内部磁力计测量磁场，同时钻铤以第二旋转角度设置，并且确定由于穿过钻铤的电流而导致钻铤和电场的一部分之间的电流之间的关系 可由内部磁力计测量。

    METHOD AND APPARATUS FOR CALIBRATING AND CORRECTING FOR COHERENT NOISE IN CASING DETECTION
    3.
    发明申请
    METHOD AND APPARATUS FOR CALIBRATING AND CORRECTING FOR COHERENT NOISE IN CASING DETECTION 有权
    用于校准和校正检测中的相关噪声的方法和装置

    公开(公告)号：US20110298462A1

    公开(公告)日：2011-12-08

    申请号：US13128506

    申请日：2009-11-17

    申请人： Brian Clark ,  Mark E. Flaum ,  Jan Morley ,  Jaideva Goswami ,  Miguel F. Pabon

    发明人： Brian Clark ,  Mark E. Flaum ,  Jan Morley ,  Jaideva Goswami ,  Miguel F. Pabon

    IPC分类号： G01V3/08 ,  G01R35/00

    CPC分类号： G01V3/26 ,  E21B47/024

    摘要： Systems and methods for improved acquisition of magnetic field data for magnetic ranging while drilling are provided. In one embodiment, such a system may include a borehole assembly and data processing circuitry. The borehole assembly may include an electric current driving tool configured to cause a current to flow across a drill collar of the borehole assembly and an internal magnetometer disposed within the drill collar and between the insulated gap and an end of the borehole assembly, which may be configured to measure magnetic field signals that penetrate the drill collar. The data processing circuitry may be configured to remove all or part of a noise component of the magnetic field signals that arises due to an eccentricity in the drill collar

    摘要翻译： 提供了用于在钻孔时磁场测量的磁场数据的改进获取的系统和方法。 在一个实施例中，这样的系统可以包括钻孔组件和数据处理电路。 钻孔组件可以包括电流驱动工具，其构造成使电流流过钻孔组件的钻铤，以及设置在钻铤内并且在绝缘间隙和钻孔组件的端部之间的内部磁力计，其可以是 被配置为测量穿过钻铤的磁场信号。 数据处理电路可以被配置为去除由于钻铤中的偏心引起的磁场信号的全部或部分噪声分量