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对石英砂岩这样极为坚硬的岩石,用传统的合金、钻粒(钢粒)等回转方法钻,一是钻效低,甚至根本钻不动,二是质量差,甚至取不上岩心。自推广金刚石小口径钻进方法以后,对付石英砂岩有了些突破,但用传统的回转方法效果还很差,有时甚至只“打滑”不进尺。为此苏、美等国和我国的地质系统,都在研究用冲击回转钻进代替传统的回转方法。近几年来,我国在这方面已取得了不少的成效,如TK—60S型绳索取心冲击回转钻具不仅在国内首创,而且在国际上也处于领先地位。我系统为满足对玻璃等工业用石英砂岩、石英岩的勘探施工,总结了1959年用钢粒和1982年用金刚石以回转钻进方法打石英砂岩的效果,以及
The extremely hard rock quartz sandstone, with the traditional alloy, drill (steel grain) and other rotary drilling methods, one low drilling efficiency, or simply not drill, the second is of poor quality, or can not take the core. Since the promotion of small diameter diamond drilling method, the quartz sandstone to deal with some breakthroughs, but with the traditional rotary method is still very poor results, and sometimes only “slippery” do not enter the ruler. To this end, the Soviet Union, the United States and other countries and China’s geological system, are studying the use of impact rotary drilling instead of the traditional rotary method. In recent years, our country has made a lot of achievements in this respect. For example, the TK-60S rope coring rotary drilling tool is not only pioneered in China, but also a leader in the world. In order to meet the exploration and construction of industrial quartz sandstone and quartzite, such as glass, my system summed up the effect of using 1951 steel pellets and diamond drilling by rotary drilling method in 1982, and