When placed near the bit, the traditional second rathole reaming run is eliminated, wellbore conditions are improved, and casing can be run that much faster.

当安放在离钻头较近的位置时，无需常规的第二趟钻进行口袋扩眼，井眼条件可得到极大的改善，套管可以更快下到位。

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8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, DTH hammer drilling, follow - up casing drilling, etc. 3.

钻机可适用多种钻进工艺方法，如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。

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Then a few more hundred feet is drilled with a narrower drill bit and then the narrower casing is run and cemented in.

FORBES: The Fracking Solution Is A Good Cement Job