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采用喷反钻具的初期,其效率往往低于一般正循环钻进很多,主要是小时效率低,回次进尺少.近几年来,由于喷反钻具的改进和操作技术的熟练,以及选用规程的日趋合理,使喷反钻进效率不断提高,但平均水平仍然不及单管钻进.为了赶上甚至超过单管钻进,我们在提高喷反钻进效率方面进行了一些探索性的工作.前年,地质十队参照《地质与勘探》过去介绍的冶勘812队的经验,设计了一种分水接头式喷反钻具,在生产实验中表明,它不
In the early stage, the efficiency of the jet-bored drill is often lower than that of the normal cycle, which is mainly due to the low hour efficiency and less footage per second. In recent years, due to the improvement of the jet-blow drilling rig and the operation technique, Routines are becoming more and more reasonable, so that the efficiency of spray-reverse drilling continues to improve, but the average is still not as good as single-pipe drilling. In order to catch or even exceed single-pipe drilling, we have done some exploratory work to improve the efficiency of spray- Two years ago, according to the experience of the 912 Metallurgical Team introduced in “Geology and Prospecting” in the past, the Geological Tenth Project designed a water-splitting type spray-and-blow drill. It shows in the production experiment that it does not