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。
Because the drilling cost is not the sole cost of bit, it is necessary to discuss here the highest rotation speed of bit in cutting rock at the lowest drilling cost.
在研究钴进过程的最佳化生产条件中，由于钻探成本的开支不是唯一的一项钻头费用，所以就有必要对最低钻探成本的最高钻头切割岩石的旋转速度进行探讨。
Drilling in gravel stratum is one of present difficulties in drilling area with low drilling speed, short service life of bit and high drilling cost.
卵砾石地层钻进是钻探的难题之一，不仅钻进速度低，钻头的使用寿命短，而且钻探成本高。
It will cut down the drilling cycle, cutdown the cost of drilling and improve the quality of bit trajectory.
因此可以缩短钻井周期，降低钻井成本，提高井身质量。
The operating performance quality of the roller bit, which is the most main broken crag tool, directly influence the well drilling quality, well drilling efficiency and well drilling cost.
牙轮钻头是钻井工程中最主要的破岩工具，其工作性能的好坏直接影响钻井质量、钻井效率和钻井成本。
With targeted bit speed and specialized MWD components, the SRT provides efficient directional drilling at a lower cost than rotary-steerable systems.
高效钻速与专业化的MWD组件，使得SRT较于常规型旋转导向系统能够以更低成本完成更加高效的定向钻进。
A method is proposed to determine the bit footage when the drilling cost per meter reaches a minimum.
本文提出了一种按最低成本原则确定单只钻头进尺的实用方法。
In order to increase drilling efficiency and reduce cost during drilling operations, it is necessary to do some research on PDC bit selection.
在钻井施工过程中，为了提高钻进效率，降低成本，对PD C钻头进行选型研究是必要的。
In order to increase drilling efficiency and reduce cost during drilling operations, it is necessary to do some research on PDC bit selection.
在钻井施工过程中，为了提高钻进效率，降低成本，对PD C钻头进行选型研究是必要的。
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