年初以来,我队五二一机在预防残留岩心的技术操作方面,摸索了一些有效的经验。从几个月的统计数字表明,五二一机的残留岩心次数,始终是少于其他几个机台。特别是4月份,钻进392米仅有三次残留,平均131米一次,创造了平均最长尺段无残留岩心。他们 Since the beginning of the year, our team has found some effective experiences in preventing the technical operation of residual cores. Statistics from a few months show that the number of cores remaining in May 21st machines is always less than that of several other machines. In April, in particular, only 396 meters of drilling left three times, an average of 131 meters, creating the longest average segment without residual core. they