To solve the problem of well bore cleaning during air and mist drilling, the test device is the key equipment and essential means.
解决空气雾化钻井井眼净化问题，试验架是关键装置、基础设备和必要手段。
In air and mist drilling, annular carries are the typical of gas, liquid and solid multiphase flow, and its mechanism and principles are very complicated.
在空气雾化钻井中，井眼环空携岩流动是一种典型的气、液、固多相流动，其机理和规律十分复杂。
In air and mist drilling, annular carries are the typical of gas, liquid and solid multiphase flow, and its mechanism and principles are very complicated.
在空气雾化钻井中，井眼环空携岩流动是一种典型的气、液、固多相流动，其机理和规律十分复杂。
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