1.
A Brief Explanation of Air Actuated DTH Hammer Drilling Efficiency
空气潜孔锤钻进是提高钻进效率的有效途径
2.
Promote the efficiency of drilling equipments in tunneling and drilling rocks
提高钻探设备在岩石中掘进钻井的效率
3.
Laser has been found very efficient in drilling small holes.
人们发现激光用于小孔钻眼效率很高。
4.
This machine adopts two species of drillingtechnique of direct and reverse circulation, the efficiency enhances observably in the process of ovum, gravel and rock layer construction.
该机可采用正反循环两种钻进工艺，在卵、砾、岩层施工中，效率显著提高。
5.
We test trip gas at every trip.
每次起下钻我们都要进行后效测量。
6.
Probe on the Failure Analysis and the Design Optimization of Drill Pipe Structure
失效分析对钻杆结构设计优化的促进
7.
Deviation Percent Model to Analyze Target Hitting of Actual Horizontal Wellbore Trajectories
水平井实钻轨迹中靶效果分析的偏差率模型
8.
FEA of Efficiency in Rotary Ultrasonic Drilling of Engineering Ceramics;
工程陶瓷旋转超声钻削效率的有限元分析
9.
Analysis on the Effect Factors of Drilling Work Efficiency and Cost in Geological Survey Project;
影响地调项目钻探施工效率与成本的因素分析
10.
Study on Improving the Drilling Efficiency of the Hailar and Tamtsay Exploration Area
海拉尔—塔木察格探区提高钻井效率技术研究
11.
Experiment on effect of cutter parameters of PDC bit on rate of penetration
布齿参数对PDC钻头破岩效率影响的试验
12.
The efficiency study of traveling hydraulic drive about the down-the-hole drill
潜孔钻机履带行驶液压驱动系统效率研究
13.
ROP increasing method based on the utilization efficiency of hydraulic power for the ultra-deep wells
基于水力能量利用效率的超深井钻井提速技术
14.
Influencing factors to extraction efficiency of surface goaf hole
地面钻孔抽采采空区瓦斯效率影响因素
15.
Discussion on the reason of influencing coalfield drilling efficiency and its countermeasure
浅谈影响煤田钻探效率的原因及其对策
16.
deepwater drilling
深水钻进、深海钻进
17.
Role of the Efficiency Unit
效率促进组的职责。
18.
departmental efficiency enhancement initiative
促进部门效率的措施