Ivar Leander Johannessen Sørheim, Stian Morken Askvik, H. Åsheim
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Performance Prediction for Dynamic Autonomous Flow Control Valves
Flow forces controls this valve by moving a plate to adjust the opening. Viscous oil tends to open the valve, while less viscous water and gas make it choke. It also chokes at high flow rates. Such features are useful for inflow control along horizontal well. It may also have wider applications.
Pressure drops were measured across a test valve, for different flow rates and fluids. Measurements were compared to an analytic solution, relating performance to fluid properties, valve geometry and dimensions.
For water and oil, the measurements generally confirmed the analytic solution, but also revealed certain deviations. Measured performance with air showed phenomena not properly predicted by the analytic solution, which does not include compressibility
Published data for a commercial flow control valve of similar geometry indicate poorer performance than for the current experimental valve. Since the construction and dimension of the commercial valve are kept under cover, reasons becomes speculative