1980年我队承担四个勘探区的钻探施工任务,其中多数钻孔孔壁不稳,坍塌、掉块、严重超径、地下水活动强烈等,给钻探施工造成了严重障碍。为了保证钻探施工的顺利进行,以往主要选用套管、泥浆、速凝早强水泥三类办法综合进行护孔堵漏,但占用时间多,成本高、可靠性差、操作繁杂,因此护孔堵漏仍是钻探技术的一大难关。例如中甸雪鸡坪勘区,钻孔弯 In 1980, our team undertook drilling and construction tasks in four exploration areas. Most of the boreholes were unstable, collapsed, dropped, seriously over-sized, and groundwater activities were violent, posing a serious obstacle to drilling. In order to ensure the smooth progress of drilling construction, in the past, the main selection of casing, mud, quick-hardening early strength cement integrated three ways to plug the hole, but take up time, high cost, poor reliability, complicated operation, It is still a major challenge for drilling technology. For example, Zhongdian Xuejiping area, drilling bend