【摘要】 介绍了卵砾石地层中的冲击钻进施工过程 ,针对冲击锤的设计选择应用 ,提出了防止卡钻、埋钻事故发生的措施 ,解决了卵砾石地层钻进中成孔难的问题 ,提高了施工效率更多还原

【Abstract】 This paper introduces the percussion drilling construction in pebble bed and according to the questions encountered in construction such as jamming event and burying accidents practical measures are proposed, which effectively resolve the drilling difficulties with high efficiency.更多还原