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水力反循环连续取心钻进（或称水力反循环钻进）是当前国内外正在迅速发展的一项钻探新技术，其主要特点是钻进过程中所产生的岩心和破碎产物能够通过冲洗液的压力由钻杆的中心通道输送到地表，可以实现边钻进边取岩心的目的。由于此种方法不需要单独的取心作业，因此与任何提钻取心和绳索取心相比较，则具有辅助时间少、取心质量好、钻进效率高及工人劳动强度低的特点，具有明显的经济和社会效益。以采用水力反循环钻进比较普及的苏联为例，由于采用了水力输送岩心的方法，因而极大地减少了钻进过程中的起下钻次数，据统计，采用КГК-300钻机组每钻进100m平均提钻0.6次，而常规岩心钻进则需
Hydraulic reverse circulation continuous coring drilling (or hydraulic reverse circulation drilling) is a new drilling technology that is rapidly developing both at home and abroad. Its main feature is that the core and broken products generated during the drilling process can pass through the washing liquid Of the pressure from the central channel of the drill pipe delivered to the surface, can be achieved while drilling core purpose. Since this method does not require a separate coring work, it has the advantages of less auxiliary time, better coring quality, higher drilling efficiency and lower labor intensity compared with any biting and cord coring, Obvious economic and social benefits. Take the hydraulic reverse circulation drilling in the more popular Soviet Union as an example. Due to the hydraulic method of core transportation, the number of drillings during drilling is greatly reduced. According to statistics, every drilling with the КГК-300 drilling rig An average of 100 drill holes is 100 times, while conventional core drilling is required