The rotary drill stem will engender direction drift in rotary drilling of directional well and cluster well.

在定向井及丛式井的转盘钻进中，旋转钻柱会产生方位漂移。

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The rotary drill stem will engender direction drift in rotary drilling of directional well and cluster well.

在定向井及丛式井的转盘钻进中，旋转钻柱会产生方位漂移。

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