论文部分内容阅读
在风化破碎,节理很发育的地层或流沙层钻进时,只要水泵片刻停止供水或水柱的压力少于孔壁的压力时,往往就发生埋钻事故。
When weathering and crushing and well-developed strata or quicksand layers are drilled, buried drilling accidents often occur as long as the pump stops supplying water or the pressure of the water column is less than the pressure of the hole wall.