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1)  Difficult Ground Condition
跟套管钻进
2)  casing-pipe connected drilling tool
套管跟进钻具
1.
An effective method is pu forward to solve the problems caused by overlying rocks by introduction of casing-pipe connected drilling tools.
对连云港田湾核电站厂区自备码头水下炸岩成孔困难进行了重点分析 ,提出套管跟进钻具能有效解决具有覆盖层岩石成孔困难的难
3)  drilling with simultaneous casing
跟管钻进
1.
The paper introduced the characteristics of DTH drilling with simultaneous casing technology,SP series of simultaneous casing drilling tool and the application of DTH drilling with simultaneous casing technology in drilling in complicated formation,such as control of geological hazard,hydropower construction,foundation treatment for urban high-rise building,highway and rai.
跟管钻进技术已发展成为对付复杂地层钻进的一种有效方法,主要介绍空气潜孔锤跟管钻进技术、SP系列跟管钻具的特点以及空气潜孔锤跟管钻进技术在地质灾害、水电建设、城市高层建筑地基处理、公路、铁道建设工程等复杂地层钻进的应用。
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4)  follow-up sleeve
套管跟进
5)  drilling speed of following pipe
跟管钻进速度
6)  DTH with simultaneous casing
潜孔锤跟管钻进
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