1.
downhole performance
钻具等设备的井下工作性能
2.
Discussion on Downhole Tool to Improve Drilling Maneuverability in Case of Narrow Density Windows
提高窄密度窗口钻井可操作性的井下工具探讨
3.
Minimum Age (underground work) Convention, 1965
（井下工作）最低年龄公约
4.
Possibility Analysis of Water-inrush From Floor in 11105W Working Face of Xiezhuang Colliery;
协庄井田11105W工作面底板突水可能性分析
5.
How to Make a Success of Supervising Downhole Operation Projects in the New Situation
浅谈新形势下如何做好井下作业工程监督工作
6.
Perhaps there will be a short trip to test the possibility of a blowout-in case the will is acting up.
当井的情况不好时，也许要进行为时较短的起下钻作业来试验井喷的可能性。
7.
Convention concerning the Minimum Age for Admission to Employment Underground in Mines
矿山井下工作最低许可年龄公约
8.
Reverse Construction Technology of Deep and Circular Well Under Asymmetry Load
非对称荷载下深圆井逆作法施工技术
9.
Power Supply Plan for Thin-layers in Fully-mechanized Mining
煤矿井下薄煤层综采工作面供电方案
10.
work - over equipment for oil and gas wells
油气井井下作业设备
11.
Industry Test of Roadheader in Coal Mines
EBZ-160型掘进机井下工业性实验
12.
Relationship Between Job Stress and Health Among The Coal Mine Well Descends Workers;
煤矿井下工人工作应激情况及其与健康的关系
13.
An Analysis on Service Behavior of Diaphragm Wall Reinforced with GFRP Bars
GFRP筋地下连续墙的工作性能分析
14.
Deepening Management Work of Danger Source in the Pit And All-aroundly Constructing Intrinsic Safety Mines
深化井下危险源管理工作 全面建设本质安全型矿井
15.
Water Blocking Technology by Grouting in Alluvial Layer Vertical Shaft Working Face Under Complex Geological Conditions
复杂条件下立井井筒工作面冲积层预注浆堵水技术
16.
Discusses in shallowly the exploration construction the small well field work importance
浅谈勘探施工中小井调查工作的重要性
17.
The State shall take special protective measures for miners working in underground coal mines.
国家对煤矿井下作业的职工采取特殊保护措施。
18.
Discussion on Clean Production for Downhole Operation
浅谈清洁生产在井下作业施工中的应用