论文部分内容阅读
在砂矿床中,90%以上的钻探工作量是采用直径为146到219毫米的钢丝绳冲击钻完成的。尽管钢丝绳冲击钻进方法在多年冻结的砂矿床中可以提供1000—1200米/台·月的高生产效率,但是它仍不能完全满足砂矿勘探的质量要求:所取得的样品被重复破碎
In sand beds, more than 90% of the drilling effort is made using wireline impact drills with a diameter of 146 to 219 millimeters. Although the wireline impact drilling method can provide high production efficiency of 1000-1200m / unit / month in multi-year frozen sand deposits, it still can not fully meet the quality requirements of sand exploration: the obtained samples are repeatedly crushed