The Daqing Oilfield succeeded in providing drilling and completion operation with accurate bottom data by this system, and developed a novel explanation method of gas formation.
大庆油田应用该系统为深层钻井完井设计施工提供了准确的井下数据，同时建立了一种新的随钻气层解释方法。
The main contents of this thesis are the research of simultaneous casing & coring method by pneumatic Down-the-Hole (DTH) hammer drilling and the innovation of a novel vegetable-gum drilling fluid.
本文是以中国水电顾问集团成都勘测设计研究院负责“架空层钻进取心技术研究”项目为依托，研究的主要内容是空气潜孔锤跟管取心钻进技术和新型植物胶冲洗液的开发研究。
To raise drilling performance of new micro-drill, a novel method was advanced for reginding of chisel edge.
为了提高新型微钻头的钻削性能，提出了一种适合于微钻头的横刃修磨原理及方法。
To raise drilling performance of new micro-drill, a novel method was advanced for reginding of chisel edge.
为了提高新型微钻头的钻削性能，提出了一种适合于微钻头的横刃修磨原理及方法。
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