1) simultaneous casing and coring drill of efflux and impact
射流式跟管取芯钻具
2) fluidic drilling tool
射流式钻具
1.
The structure and manufacture of new type of bits,working principle and types of fluidic drilling tools,action mechanism of anti-cave-in thinners,for difficult formation drilling were discussed.
阐述了难钻进地层用新型金刚石钻头的结构、制造特点,射流式钻具的原理、类型,以及防塌型稀释剂的作用机理。
4) double barreled forced coring tools
双管强制取芯钻具
5) 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。
6) downing hole hammer with ream drilling and casting
潜孔锤跟管钻具
补充资料：管取
1.包管。
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