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我队于1955年10月间，接受为某厂勘探铸型砂——石英砂的任务。由于对松散的石英砂缺乏勘探经验，在钻探工作上，开始时走了一段弯路。准备用3ИB-150型钻机和国产50公尺手搖钻钻进，在钻探开工前，由于考虑到降低成本，节约资金，决定暂时不使用钻机，只用套管、岩心管和改制的泵球钻头等，用人力拉绳冲击钻进。这种方法在地下水面以上进尺效率很高，一、二分钟就可进尺一公尺；但在水
My team in October 1955, accepted as a plant exploration sand - quartz sand task. Due to the lack of exploration experience on loose quartz sand, a detour was started at the beginning of drilling work. Ready to drill with a 3ИB-150 rig and a 50-foot hand-cranked drill in China. Before drilling, due to cost reduction and capital savings, it was decided not to use a drilling rig for the time being. Only casing, core pipe and modified pump ball Drill, etc., with the human impact of drilling into the rope. This method of footage above the ground surface footage efficiency is very high, one or two minutes to enter the meter a meter; but in the water