漂卵石地层钻探一直是施工中的难题,钻进过程中孔内经常出现漏浆、坍塌、掉块等现象,容易造成卡钻事故。尤其是钻进过程中孔内遇到大漂石,且出现漂石随钻头一起回转的情况,这在施工中非常少见,处理起来尤其困难。在洛阳吉利地区钻井施工过程中就遇到了这种情况,最后采用孔内定向爆破的方法,将漂石击碎,然后用岩芯管套取。这一方法成功地解决了施工中的难题,取得了较好的效果。 Pebble stratum drilling has always been a difficult problem in the construction. During the drilling process, the grout often leaks, collapses and falls due to the phenomenon of sticking out. It is easy to cause a stuck pipe accident. In particular, large boulders were encountered in the boreholes during drilling and boulders appeared together with the drill bit. This was rare in construction and was especially difficult to handle. In the Geely area of ​​Luoyang, drilling encountered this situation, and finally the method of directional blasting in the hole was used to crush the rock and then use the core tube to take. This method has successfully solved the construction problems and achieved good results.