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1·Statistic method is used to study drilling cost and its regularity changing.

应用概率统计的方法研究了小井眼钻井成本及其变化规律。

2·It is the important way for shortening drilling cycle and decreasing the drilling cost.

这是缩短钻井周期、降低钻井成本的重要途径。

3·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。

4·Rock drill-ability is the basic parameter to optimize bits, make drilling plan and reduce drilling cost.

岩石可钻性是优选钻头，制定生产定额以及降低钻井成本的基础。

5·These new equipments can bring higher drilling rate, lower drilling cost and remarkable economy benefits.

采用这些新设备可提高钻井速度，降低钻井成本，经济效果显著。

6·So it is necessary for the Drilling Cost Model that combines with TC and ABC to be researched and popularized.

因此，将目标成本和作业成本结合起来的钻井成本模式，旨在降低钻井的口井成本，很有研究和推广的必要。

7·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。

8·To bypass obstacles, a 2-D directional well, which can be drilled easily and has the low drilling cost, has many advantages.

二雏绕障定向井具有容易施工和钻井成本低等特点。

9·The approach can decrease drilling cost and reduce drilling period, realize great economic benifit in offshore drilling operation.

采用这种方法可节约海上钻井成本，缩短建井周期，获得显著的经济效益和社会效益。

10·Evaluation of the service life of a rotary drilling line is of great importance to ensuring safe drilling and reducing drilling cost.

钢丝绳使用寿命评定对确保钻井安全与降低钻井成本具有十分重要的意义。