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第五讲冲洗钻孔及固定隔离塞第一节冲洗钻孔为了清出孔内的岩粉或替换出孔内的稠泥浆,以及刷洗粘附于孔壁上的泥皮和岩粉,使水泥浆液凝固后,能够较好地与孔壁相胶结,提高封孔质量,在封孔之前必须进行冲洗钻孔。用清水钻进的钻孔,洗孔工作比较简单,开动水泵用大泵量进行冲孔,洗净孔壁、排除孔内岩粉即可。用泥浆钻进的钻孔,因采用清水洗孔将会导致坍塌事故,所以应根据不同情况分别进行
Lecture 5 Flushing Drilling and Securing Isolator Plugs Section 1 Flushing Drilling In order to clear the rock powder in the hole or replace the thick mud in the hole and scrub the mud and rock powder adhering to the hole wall to make the cement After the grout is solidified, it can bond well with the hole wall to improve the sealing quality. Before the hole sealing, the hole must be drilled. Bored with water drilling, washing the hole is relatively simple, start the pump with a large pump for punching, washing hole wall, hole can be ruled out of rock. Borehole drilling with mud, because the use of clean water holes will lead to collapse accident, it should be carried out according to different circumstances