boring contract

Multimedium reverse circulation composite drilling technique is a new geological drilling method effectively combined air reverse circulation continuous sample with hydraulic reverse circulation core drilling.

多介质反循环复合钻探技术是一种将空气反循环连续取样和水力反循环取心钻探技术有效结合起来的全新地质钻探方法。

Itis expounded that the poly-drilling technique is thedeveloping trend of the geodrilling technique of Chinain the future.

探讨了新世纪我国地质钻探技术的发展，论述了综合钻探技术是我国未来地质钻探技术的发展方向。

The processes of the combined drilling technology research, field testing and technical effects.

组合钻探工艺是一种为了提高不同地层取样钻探施工综合效率的多用途钻探技术。