四川地区除盆地外，多以古老地层为主，加之构造破坏及区域变质的影响，钻探工作中，部份矿区或地层，坚硬破碎或松软，易被冲蚀等，岩、矿芯采取极为困难。它既有碍获得充分可靠的地质资料，同时由于采取率低，大量岩屑破碎后积存孔内，重复破碎，影响钻进效率，甚至孔内事故频繁。提高这些矿 In addition to the basins in Sichuan Province, most of them are dominated by ancient strata, combined with structural damage and regional metamorphism. In drilling work, some mines or formations are hard to crush or soft, and are easily eroded. Therefore, it is extremely difficult for rock and core to be taken . It not only hinder access to fully reliable geological data, and because of the low rate, a large number of debris crushed accumulation hole, repeated crushing, affecting the drilling efficiency, and even accidents in the hole. Raise these mines