Practical equations calculate gas flow rates through venturi valves

Oil field operators can use several practical equations for calculating flow rates of natural gas through venturi gas-lift valves.For critical flow, this analysis derived such equations from a rigorous theoretical model for gas isentropic evolution that uses real-gas calculations not restricted to density but encompassing also other relevant thermodynamic properties.This rigorous model is complex and requires a computational algorithm and relatively much computer time.For expeditious hand calculations or using simple spreadsheets, the equations presented in this article are within the accuracy needed and require much less computational effort.For subcritical flow, this article suggests an...

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