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Tubing Size Selection

Compare friction, velocity, and liquid loading across standard tubing sizes for your production conditions.

Liquid Rate (BPD)

Gas Rate (MMSCFD)

Flowing Pressure (psi)

Fluid Density (lb/ft3)

Comparison Table

Tubing	ID (in)	Velocity (ft/s)	Ve (ft/s)	dP/1000ft (psi)	Status

Recommendation

Engineering formulas

Velocity: v = Q_total / (pi/4 * d^2), where Q in ft3/s

Erosional velocity: Ve = C / sqrt(rho), C = 100 (API RP 14E)

Friction dP: dP/L = f * rho * v^2 / (2 * d * 144), Moody friction f ~ 0.02

Optimal: velocity > Turner critical (for liquid loading) but below erosional limit

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