Apparatus and method for resistivity measurements during rotational drilling
    1.
    发明授权
    Apparatus and method for resistivity measurements during rotational drilling 有权
    旋转钻孔期间电阻率测量的装置和方法

    公开(公告)号:US07250768B2

    公开(公告)日:2007-07-31

    申请号:US10657870

    申请日:2003-09-09

    IPC分类号: G01V3/18

    摘要: A resistivity sub including a resistivity sensor forms part of a bottom hole drilling assembly. The sensor is maintained at a substantially fixed offset from the wall of a borehole during drilling operations by, for example, a stabilizer. In WBM, galvanic sensors may be used, with or without commonly used focusing methods, for obtaining a resistivity image of the borehole wall. In OBM, capacitive coupling may be used. The apparatus is capable of using other types of sensors, such as induction, MPR, shielded dipole, quadrupole, and GPR sensors.

    摘要翻译: 包括电阻率传感器的电阻率子层构成井底钻井组件的一部分。 在例如稳定器的钻井操作期间,传感器被保持在与钻孔壁基本上固定的偏移。 在WBM中,可以使用电流传感器,具有或不具有常用的聚焦方法,以获得井壁的电阻率图像。 在OBM中,可以使用电容耦合。 该装置能够使用其他类型的传感器,例如感应,MPR,屏蔽偶极子,四极杆和GPR传感器。