negative flow control orifice;反向流操纵量孔 negative flow control pressure;反向流操纵压力 negative flow control signal;反向流操纵信号 ..
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The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus .
井底负压值控制是欠平衡钻井技术的基础,而井底负压值的大小与环空多相流的有关压力计算有关。
Meanwhile, the control of air flow, furnace negative pressure and primary air flow are introduced.
同时也介绍了送风量、炉膛负压和一次风量的控制。
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