rotary drilling

Based on the principle of conversation of energy,the energy for rotary drilling has been analyzed.

旋转钻进是岩土工程钻探的主要钻进方式,从能量守恒原理出发,对旋转钻进的能量进行分析。

Based on the construction practice and the theoretical analysis, the technique for auger-percussive-rotary drilling is defined.

以施工实践为基础,结合理论分析,提出了一种在岩土锚固工程施工中广泛应用的新型钻探工艺技术———螺旋冲击回转钻进技术。