水平定向钻无套管双管回托工艺研究

Research of Technique about Double Pipe Horizontal Directional Drilling without Bushing

本文结合单根管道水平定向钻穿越回托力计算，对无套管双管回托力计算方法进行了理论分析，并通过工程实例对计算公式进行了修正，得出了无套管双管回托力计算方法，以期为同类工程实践提供理论参考。

In this paper, we analyzed the tow power of double pipe horizontal directional drilling without bushing, and compared the result with a project. By this way we can provides a theory reference for other similar project.