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过去,钻探一直使用普通泥浆作为冲洗液,从1972年推广使用羟甲基纤维素泥浆以来,在钻探施工中对排除岩粉,维护井壁取得了较好的效果。1975年,我们又进行
In the past, drilling fluid has been used as a flushing fluid. Since the promotion of hydroxymethylcellulose slurry in 1972, it has achieved good results in rock drilling to exclude rock dust and maintain the borehole wall. In 1975, we went on again