CHARACTERIZATION OF WHIRL DRILLING DYSFUNCTION
    1.
    发明申请
    CHARACTERIZATION OF WHIRL DRILLING DYSFUNCTION 有权
    六角钻孔功能特征

    公开(公告)号:US20160369612A1

    公开(公告)日:2016-12-22

    申请号:US15186012

    申请日:2016-06-17

    CPC classification number: E21B44/00

    Abstract: Methods and systems output at least one drill string whirl attribute, such as magnitude, orientation, velocity and type, without requiring determination of whirl frequency. Transforming acceleration data into drill string motions provides a path of one point along the drill string. Fitting these motions throughout one complete revolution of the drill string to a revolution ellipse, for example, provides revolution ellipse centers defining centers of rotation for each revolution fitted. A whirl ellipse, for example, derives from another fitting using a plurality of the revolution ellipse centers. Coefficients from the whirl ellipse and/or vector direction of the centers provide at least one whirl attribute for output.

    Abstract translation: 方法和系统输出至少一个钻柱旋转属性,例如大小,方向,速度和类型,而不需要确定旋转频率。 将加速度数据转换为钻柱运动提供沿着钻柱的一个点的路径。 例如,将钻柱的一整个旋转中的这些运动装配到旋转椭圆,提供旋转椭圆中心,其限定每次旋转旋转的旋转中心。 例如,旋转椭圆由使用多个旋转椭圆中心的另一配件导出。 来自中心的旋转椭圆和/或矢量方向的系数为输出提供至少一个旋转属性。

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