Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit)
    1.
    发明申请
    Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) 有权
    包含在钻头上的地层电阻率测量传感器(电阻率)

    公开(公告)号:US20040104726A1

    公开(公告)日:2004-06-03

    申请号:US10462884

    申请日:2003-06-16

    IPC分类号: G01V003/06 G01V003/18

    摘要: A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses an electrode for injecting current into the earth formation and an electrode for obtaining a responsive signal from the borehole. The electrodes are located on the drill bit arm or blade. Measured resistivity values are obtained at the location of the drill bit. Measurements can be taken in both oil-based mud and water-based mud environments. Maximum or minimum resistivity can be used to best represent the resistivity of the surrounding formation.

    摘要翻译: 用于获得MWD装置中的钻孔周围的地层的电阻率测量的方法和装置使用用于向地层注入电流的电极和用于从钻孔获得响应信号的电极。 电极位于钻头臂或刀片上。 在钻头的位置处获得测量的电阻率值。 可以在油基泥浆和水基泥浆环境中进行测量。 最大或最小电阻率可用于最好地表示周围地层的电阻率。