... 欠达到最高限度盐水钻井液unsaturated salt water drilling fluid 欠平衡钻井underbanlanced drilling 欠压实uncompaction ...
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It is showed by field and experimental that the underbanlanced drilling(UBD) and special gas drilling is the effective way to improve ROP and efficiency.
研究和现场试验表明，采用欠平衡钻井技术，尤其是气体钻井技术是钻井提速增效的有效途径。
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