1964年以来,我们一直是用分水接头式的喷反钻具保护矿心,在使用中虽有一定效果,但此种钻具常会出现某些缺点.如:反水能力不强;岩心管长度受限制;井底残留岩、钻粉要求严格;喷咀与混合室的距离经常变动等,至今还没有找出很好的解决办法.去年,我们学习了兄弟单位接手喷反钻具的使用经验,收到很好的效果.我们的体会是: Since 1964, we have always used sprinkler nozzles to protect the core, although some effects have been found in the use of such tools. However, such tools often exhibit some disadvantages, such as: poor anti-water capability; Length restrictions; residual bottom rock, drill rigorous requirements; nozzle and the mixing chamber distance often changes, so far have not found a good solution last year, we learned the brother unit took over the use of spray-reverse drilling Experience, received very good results. Our experience is: