Based on the principle of mass balance, this paper deals with rules of. motion of the pseudo-fluid level in the annular space in the process of testing the pumping oil well.
本文应用物质平衡原理，研究了抽油井环空拟液面在测试过程中的运动规律。
It was shown that heat transfer coefficient increases with increasing heat flux, mass flux and decreasing gap of the annular channel.
结果表明：沸腾换热系数随着热流密度和质量流率的增加而增加，随着狭缝尺寸的增加而减小。
Based on the principle of mass balance, the Pseudo-Level Depth Finder can attain the true level by testing annular gas rate.
根据物质平衡方法设计的拟液面测试仪，可通过测试油井环空排气量来确定油井的真实液面。
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