定向钻+反井钻在斜井施工中的应用

Application of Directional Drilling+Reverse Well Drilling in Inclined Shaft Construction

在抽水蓄能电站的建设中,长斜井的施工是重点和难点,采用反井钻施工已经越来越普遍。但是随着斜井长度增加,反井钻施工的精度和施工速度会受限,定向钻具有精确的测量仪器,而反井钻在扩孔中具有稳定的施工技术,将二者结合起来充分发挥各自的优势使得施工的精度得到了提高,同时施工进度也有了保障。

In the construction of pumped storage power plant,the construction of long inclined shaft is the key and difficult point,and it is more and more popular to use reverse well drilling.However,with the increase of inclined shaft length,the accuracy and speed of reverse drilling construction will be limited.Directional drilling has accurate measuring instruments,while reverse drilling has stable construction technology in reaming.Combining the two methods to give full play to their respective advantages makes the construction accuracy improved and the construction progress guaranteed.