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- A mechanical model for the offset-axes pendulum drill assembly (OAPDA) was established according to the continuous beam theory and the D. 运用纵横弯曲连续梁理论和达朗伯原理,建立了偏轴钟摆钻具组合动力学分析模型。
- By forming a thin film around the drill bit,drill assembly,thus preventing the balling of the drill bit and drill pipe,the ROP accelerators rendered the mud lubricity and incre... 机械钻速提速剂能在钻头、钻具组合等金属表面形成一层薄膜,防止钻屑黏附于钻头和钻具上发生泥包,从而起到润滑的效果,提高了钻速。
- The results of inclining-prevention drilling assembly with stabilizers are not so ideal during drilling decimated formations. 在易斜地层钻进时，带扶正器的防斜钻具组合的防科效果往往不甚理想。
- Scientific drilling methods,proper drilling assembly and monitoring with drilling shall be used to ensure success of horizontally sidetracked wells during ... 科学的工艺措施、合理的钻具组合、适宜的随钻监控方法是保证侧钻水平井成功的关键。
- When the mechanics performance of BHA(Bottom Drilling Assembly),that consists of conventional stabilizer and drilling collar,can not meet actual operation,it has to be changed. 常规稳定器和钻铤构成的底部钻具组合(BHA)其力学特性不能改变,若与实际要求不相符合时,必须起下钻更换。
- Scientific drilling methods, proper drilling assembly and monitoring with drilling shall be used to ensure success of horizontally sidetracked wells during the drilling operation. 科学的工艺措施、合理的钻具组合、适宜的随钻监控方法是保证侧钻水平井成功的关键。
- An Analysis of Field Performance of Drill Assembly with Single Centralizer 单扶正器钻具组合现场应用效能分析
- Jack was assigned to the assembly shop of the factory. 杰克被分配到厂里的装配间工作。
- At six we were fallen in for drill. 六点钟我们站好队准备操练。
- 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。
- Robots are replacing people on assembly lines. 机器人逐渐代替了装配线上的工人。
- 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。
- This drill can bore through rock. 这台钻机能钻透岩石。
- The head teacher told the school at assembly. 校长在全校学生大会上讲话。
- The dentist's drill made a lot of noise. 牙钻发出很大的噪音。
- A legislative assembly is being held. 一个有关立法的会议正在召开。
- People have the rights of assembly and expression. 人们有集会和发表言论的权利。
- Local assembly will help sale to some extent. 在当地组装将在某种程度上促进产品销售。
