Gas Lift Dome Pressure Functions
Nitrogen dome pressure, test-rack opening pressure and valve spread for IPO valves.
4 functions
PO.GL.Valve.Pdome(Pd_s, Ts, Td)
Calculates absolute dome pressure at depth from surface dome pressure, real-gas nitrogen charge, [psi].
PO.GL.Valve.TRO(Pd, Td, R)
Calculates test rack opening pressure at 60°F, absolute, with atmospheric pressure on the tubing side, [psi].
PO.GL.Valve.Pvc(Pd, R)
Calculates valve closing pressure; equals the dome pressure for a valve without a spring, [psi].
PO.GL.Valve.Spread(Pvo, Pvc)
Calculates valve spread (opening minus closing pressure), [psi].