1) drilling under pressure
回压钻进
2) percussive-rotary extruding drilling
冲击回转挤压钻进
3) rotary drilling
回转钻进
1.
GCF-20A reverse circulation percussive rotary drill rig is a multi function drill rig with percussive drilling as the main means and rotary drilling as supplemented.
GCF - 2 0A型冲击 -回转反循环工程钻机是以冲击钻进为主、回转钻进为辅的多功能钻机 ,可适应软、硬岩石等不同地层钻进的要求。
2.
The description is made of the introduction and analysis of the popular drilling hole technique that used in large boulder formation, including normal drilling technique such as digging, percussion drilling, rotary drilling, large diameter DTH drilling, explosion drilling technique and combined drilling technique.
介绍了目前在含巨大孤石地层中的成孔方法 ,包括一般方法如开挖法、冲击钻进、回转钻进、大直径潜孔锤钻进、爆破法、复合钻进工艺。
3.
The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No.
介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
4) back reaming
回扩钻进
5) Negative pressure drilling
负压钻进
6) forward thrust
给进钻压
补充资料:冲击波超压与动压