孔底捞渣器──喷射反循环接头我队在处理严重烧钻事故时，因处理不当，致使孔底碎块不断增多，给处理事故带来很大麻烦，甚至中途终孔。《地质与勘探》也曾刊登过处理这类问题的文章，但都因钻孔口径的限制（φ４７）而不适合。为此，我们设计了一种适合小口径使用的捞渣... Hole bottom slag trap - jet reverse circulation joints Our team in dealing with serious burns accident, due to improper handling, resulting in the bottom of the hole pieces continue to increase, to deal with the accident caused great trouble, and even halfway through the hole. Geology and Exploration has also published articles dealing with such issues, but they are not suitable due to the limitation of borehole diameter (φ47). To this end, we have designed a suitable for small-caliber slag ...