... drill-hole survey 测井斜；测井 drill-in fluid 钻井液 drilling ahead 套管鞋下钻井；重新钻井 ...
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drill in fluid 钻井完井液
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For fluid dynamics parameters, media properties of check valve performance relationship in China, in order to promote the drill string check valve research theory and technology progress.
寻求流体动力学参数、介质性质对止回阀性能的影响关系，以推进我国钻柱止回阀研究理论和技术进步。
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