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- North W12-1 Oilfield in Zhanjiang of Guangdong province has drilling problems of borehole wall collapse and stripping, which had often caused accidents of well and instrument burial. 摘要广东湛江W12-1北油田开发过程中遇到了钻井中井壁易垮塌、易剥落的难题，易造成井壁坍塌、掩埋钻井及仪器事故。
- Teaching assistants provide drill problems on a weekly basis for review and discussion during the recitation sections. Drill problems are included courtesy of the teaching assistants listed below. 助教每周布置的疑难问题将在复习讨论课上进行检查和讨论。疑难问题及提供的老师名列表如下。
- Balanced Pressure Drilling Problem in Low Permeability Gas Formation 低渗天然气层的平衡压力钻井问题
- The drilling troops mustered on the hill. 演习部队在小山上集合起来了。
- I look at this problem from a different viewpoint. 我从不同的观点来看这个问题。
- She skirted round the problem of the high cost. 她避而不谈巨额费用问题。
- It may take a long time to find a solution to the problem. 也许要花很长时间才能找到解决这个问题的办法。
- The workman is drilling in the wall. 工人正在墙上打孔。
- In dealing with the problem he was cautious to an extreme. 他在处理这个问题时谨慎得过分了。
- Drilling is cutting a hole with a drill. 钻削就是用钻头钻一个孔。
- The problem is how we are to get the raw material. 问题是我们怎样得到原材料。
- Heavy traffic poses a problem in many old towns. 交通拥挤是许多旧城镇的难题。
- 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。
- The problem is quite plain to us. 那问题我们都很明白。
- They dealt with the problem in a purposeful way. 他们处理这问题很果断。
- The sound of that drill jangles horribly on the nerves. 那台钻机的声音响极了，十分刺耳。
- A new problem has been reared up in production. 生产中出现了一个新问题。
- 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。
- It was Susan who brought the problem to our notice. 是苏珊提醒我们注意那个问题的。
