State-of-the-art of no-dig directional drillers and their intelligent control;

A mud purification and recovery device used for non-open-cut directional drilling;

The case study of non-excavating directional drilling technique in power engineering is introduced,flow sheet,construction equipment and pipe installation of non-excavating technique are analysed.

The application of guided boring trenchless technology in laying out horizontal earth line;

Based on non-excavation pipe-laying construction on Kailuo High Way of Henan Province, the paper briefly analyzes curved mechanism in drilling horizontal hole and introduces executing method and its practical effect.

The article briefly introduces a non-excavation construction technology for the small-diameter pipeline i.

This article introduced occurred mechanisms of the power plant underground water pipeline leakage,describes various non-excavation repair technology features,introduced the application of high-density polyethylene pipes in Jiaozuo power plant.