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去年年初,我队根据省局突破复杂地层的攻关方案,拟定了重新试用和推广无泵钻进方法。其目的,主要是解决下述三个技术问题:(一)顺利穿过基岩上部的不稳固地层;
At the beginning of last year, according to the plan of the provincial bureau to break through complex stratums, our team has drafted a trial and promotion of non-pump drilling method. Its purpose is mainly to solve the following three technical problems: (1) smoothly through the upper part of bedrock unstable stratum;