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在九曲矿区的钻探中,用常规办法一直未能解决钻孔坍掉的难题,造成钻孔报废,后改用DWY型无固泪洗井液,取得了满意的技术效果。
In the drilling of Jiuqu mining area, the conventional method has not been able to solve the problem of collapse of the borehole, resulting in the abandonment of the borehole and the later use of DWY type no-tear fluid and has achieved satisfactory technical results.