under-balance drilling 欠平衡钻井 ; 欠均衡钻井
under-balance drilling technology 欠平衡钻井技术
under balance pressure drilling 欠平衡压力钻井
Use of foam fluid for under balance drilling is a...
利用泡沫流体进行欠平衡钻井，是一种较安全的钻井技术。
The principle of reaching balance drilling and under balanced drilling using foam mud in water well drilling in Karst formation was presented.
分析了岩溶地层水文水井施工中，泡沫实现平衡压力或欠平衡压力钻井的原理及影响泡沫钻井有效井眼压力的因素。
Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.
该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组，以防止该区古生界灰岩储层发生井漏及储层污染，从而保护油层。
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