1) DTH hammer drilling with eccentric simultaneous casing
偏心跟管钻具
1.
This paper introduced a new type DTH hammer drilling with eccentric simultaneous casing about the structure composition and the design idea.
介绍了新型偏心跟管钻具的结构组成以及设计思路。
2) concentric simultaneous casing drilling tool
同心跟管钻具
1.
By the analysis of present drilling ways,and according to the characteristics of gravel strata,application feasibility is put forward for DTH hammer concentric simultaneous casing drilling tool in gravel strata,and analysis are made on the structure principle and characteristic of drilling tool.
通过分析目前在卵砾石地层的钻进方法,并针对这一地层的特点,提出了潜孔锤同心跟管钻具在该地层中应用的可行性,并分析设计了钻具的原理、结构及特点。
3) eccentric casing drilling
偏心跟管钻进
5) eccentric drill tool
偏心钻具
6) DTH hammer drilling with concentric simultaneous casing
潜孔锤同心跟管钻具
1.
Analysis and research on accessories intensity of DTH hammer drilling with concentric simultaneous casing;
潜孔锤同心跟管钻具零件强度分析与研究
补充资料：偏心
1.谓心存偏向，不公正。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条