Page 159 - Formulas and Calculations for Petroleum Engineering

152 Formulas and calculations for petroleum engineering

2.186 Pump pressure/pump stroke relationship

Input(s)
PCP: Present Circulation Pressure (psi)
NPR: New Pump Rate (spm)
OPR: Old Pump Rate (spm)

Output(s)
PP: Pump Pressure—Pump Stroke Relationship (psi)

Formula(s)

2

NPR
PP ¼ PCP
OPR
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, second edition,
Gulf Professional Publishing, Page: 27.

2.187 Radial force related to axial load—Cementing

Input(s)
F: Force or Load to Break Cement Bond (lbm)
a: Slip Bowl Taper Angle (degree)
m: Constant (Usually 0.2) (dimensionless)

Output(s)
W: Radial Force related to Axial Load (lbm)

Formula(s)

1 m tanaÞ
ð
W ¼ F
m + tana
Reference: Suman Jr, G. O., & Ellis, R. C. (1977). Cementing Handbook. World Oil, Page: 18.

2.188 Range of load—Sucker-Rod pump

Input(s)
PPRL: Peak Polished Rod Load (lb)
MPRL: Minimum Polished Rod Load (lb)

Output(s)

ROL: Range of Load (lb)