Water jet flow is one of the decisive factors for drilling rate during rock bit drilling.

在牙轮钻头的钻进中，水射流是钻进速度快慢的决定因素之一。

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It is proposed that economical performance of diamond bits be quantitatively appraised by use of bit drilling cost.

并提出用钻头钻进成本定量地评价金刚石钻头的经济效果。

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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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Real estate is a bit like the oil drilling business.

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If they do strike oil, however, they might invest a bit more and put the drilling gear in place.

ECONOMIST: Economics focus

The tough bit is getting the requisite amount of drilling mud far enough down the well.

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