A key tool of drilling multilateral horizontal well is retrievable whip stock.

钻多分枝水平井的关键工具是可回收式斜向器。

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Those having three or four flutes are used for following smaller drills or for enlarging holes already drilled, and are not suited for drilling into solid stock.

那些有三个或四个长笛被用于下列较小的训练或扩大孔钻，不是已经适合钻井变成固体。

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Those having three or four flutes are used for following smaller drills or for enlarging holes already drilled, and are not suited for drilling into solid stock.

那些有三个或四个长笛被用于下列较小的训练或扩大孔钻，不是已经适合钻井变成固体。

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