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岩心钻探是地质找矿的重要手段,提高钻进效率和取心效果一直是钻探工作者奋斗的目标。目前国外的取心钻进几乎均为金刚石钻进,而其中采用绳索取心的又占80—90％,因而绳索取心金刚石钻进技术在当前的岩心钻探中占统治地位,它与普通取心法相比,大大减少了起下钻杆的次数,从而增加了纯钻进时间,相应地提高了效率,并且可以不必过分追求回次进尺长度而影响岩心的完整性和采取率。但绳索取心仍然未能完全消除花费在取心上的非
Core drilling is an important means of geological prospecting. Improving drilling efficiency and coring effect has always been the goal of drilling workers. At present, almost all of the overseas coring drilling are diamond drilling, of which the use of rope coring accounted for 80-90%, so the rope coring diamond drilling technology in the current core drilling in the dominant position, which with ordinary take Compared with the heart method, the number of drill rods is greatly reduced, thereby increasing the pure drilling time, correspondingly improving the efficiency, and can not affect the integrity and the rate of core without going back to the footage length excessively. However, the coring of ropes still failed to completely eliminate the corollary