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本发明涉及到在河床下和其它地表障碍物下安装生产管道、导线管或水管,用不着疏干河床和挖管沟及改建障碍物的工艺过程。不是首先从障碍物到相应的对面处,打一个导向孔,而是随着正在钻的导向孔将一个套在钻杆柱上的冲洗管(内径比钻杆柱外径
The present invention relates to the process of installing production pipes, conduits or pipes under riverbed and other surface obstructions without the need to divert the riverbed and digging ditches and rebuild obstacles. Rather than first making a pilot hole from the obstruction to the corresponding opposite, instead of using a pilot hole drilled with a flush pipe (the inner diameter is smaller than the outer diameter of the drill string