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- The reason is the borehole drilled by eccentricity PDC bit is over diameter.ROP is improved and the cost of drilling will be lowed as a result of using eccentricity PDC bit. 使用偏心PDC钻头在流动性盐岩地层中钻进，因偏心PDC钻头能钻出超尺寸井眼，没有发生卡钻头和下部钻具组合的事故，提高了钻井速度，降低了钻井成本。
- roadway retaining and borehole drilling 留巷钻孔法
- HRS88-1, borehole is another Quaternary borehole drilled after Shun-5 bore hole in the north of the Beijing Plain. HR88－1孔是北京平原区北部继顺5孔之后，又一重要的第四系钻孔。
- Application of Tube-shaped Triple-flank Cone Bits in Borehole Drilling for Wenzhou World Trade Center 筒状内锥三翼钻头在温州世贸中心大厦成孔施工中的应用
- Research and development on gas and water separator for gas drainage with moisture borehole drilling 赋水钻孔瓦斯抽采气、水分离器的研发应用
- Humble Opinion about Giving Full Scope to Hydraulic Power in Freezing Borehole Drilling 冻结钻施工中发挥水力作用的浅见
- Development and application status of MK series flat long distance borehole drilling rig MK系列近水平长距离钻机的研究应用现状
- The drilling troops mustered on the hill. 演习部队在小山上集合起来了。
- Measures of Deflection Prevention and Deflection Control for Freezing Borehole Drilling 冻结钻孔偏斜预防及控斜处理措施
- Quality control of freezing borehole drilling in complicated geological conditions 复杂地质条件下冻结造孔质量控制
- New technology of pneumatic cutting removing for borehole drilling applied to seam with outburst potential in Qinan Mine 钻孔风力排渣新技术在祁南煤矿突出煤层中的应用
- The workman is drilling in the wall. 工人正在墙上打孔。
- Drilling is cutting a hole with a drill. 钻削就是用钻头钻一个孔。
- At six we were fallen in for drill. 六点钟我们站好队准备操练。
- The noise of the drilling is intolerable. 钻孔的噪音让人受不了。
- Keywords sidetracking horizontal well frictional force mathematical model elasticity borehole drill pipe joint analysis; 侧钻;水平井;摩擦力;模型;弹性;井眼;钻杆接头;分析;
- The sound of that drill jangles horribly on the nerves. 那台钻机的声音响极了，十分刺耳。
- You'd better set a goal before you start the drill. 练习开始前，你最好设定一个目标。
- After a long drill he told the squad to fall out. 操练了好半天之后，他让这个班解散了。
- She had lots of drill in listening. 她在听力方面受过许多训练。
