Page 85 - Formulas and Calculations for Petroleum Engineering

78 Formulas and calculations for petroleum engineering

2.11 Annular velocity for a given circulation rate

Input(s)
Q: Circulation Rate (gpm)
d h : Inner Diameter of Casing (in.)
d p : Outer Diameter of Casing (in.)

Output(s)

AV: Annular Velocity (ft/min)

Formula(s)

24:5 Q
AV ¼ 2 2
d d
h p

Reference: Lyons, W. C., Carter, T., and Lapeyrouse, N. J., 2012, Formulas and Calculations for Drilling, Production and
Workover, Third Edition, Gulf Professional Publishing, Page: 21.

2.12 Annular velocity for a given pump output

Input(s)
O p : Pump Output (bbl/min)
d h : Inner Diameter of Casing (in.)
d p : Outer Diameter of Casing (in.)

Output(s)
AV: Annular Velocity (bbl/min)

Formula(s)

O 1029:4
p
AV ¼ 2 2
d d
h p
Reference: Lyons, W. C., Carter, T., and Lapeyrouse, N. J., 2012, Formulas and Calculations for Drilling, Production and
Workover, Third Edition, Gulf Professional Publishing, Page: 21.

2.13 Annular volume capacity of pipe

Input(s)
D h : Inner Diameter of Casing against Pipe (in.)
D o : Outside Diameter of Pipe (in.)
L: Length of Pipe (ft)

Output(s)

V a : Annular Volume Capacity (bbl)