Since 1967

Unico, Inc.
3725 Nicholson Rd.
P. O. Box 0505
Franksville, WI
53126-0505
262.886.5678
262.504.7396 fax
oilgas@unicous.com
unicous.com



SRP Calculator™
Sucker-Rod Pumping System Design Tool

Well
Well Name  
Fluid Production Rate (bpd)
323
Pump Speed (spm)
Oil Production Rate (bpd)
65
Pump Depth (ft) 
Polished Rod Power (hp)
26.1
Fluid Depth (ft) 
Minimum Motor Size (hp)
60.0
Tubing Pressure (psi)
Casing Pressure (psi)

Energy
Pump Utilization (hr/day)
Electrical Input Power (kW)
26.3
Gearbox Efficiency (%)
Effective Lift Power (kW)
14.4
Motor Efficiency (%)
System Energy Efficiency (%)
54.7
Electrical Energy Cost ($/kWh)
Oil Lift Energy Cost ($/bbl)
0.579
Monthly Energy Cost ($)
1150

Fluid
Water Cut (%)
Oil Specific Gravity
0.887
Water Specific Gravity
Fluid Specific Gravity
1.017
Oil API Specific Gravity
Fluid Column Load (lb)
9865

Pumping Unit
Class
Max. Gearbox Torque (M in-lb)
958.91
Stroke Length (in) 
Existing CB Effect (lb)
23557
Structural Unbalance (lb) 
Required CB Effect (lb)
22344
Existing CB Moment (M in-lb)
Required CB Moment (M in-lb)
1897.00

Rod String
Type
Buoyant Rod Load (lb)
15911
Total Rod Length (ft) 
Maximum Rod Load (lb)
30925
Upper Section Length (ft) 
Minimum Rod Load (lb)
10763
Lower Section Length (ft) 
Upper Section Stress (psi)
39131
Sinker Bar Length (ft) 
Middle Section Stress (psi)
37311
Upper Section Diameter (in)
Lower Section Stress (psi)
35330
Lower Section Diameter (in)
Sinker Bar Diameter (in)
Drag Friction Coefficient 
Stuffing Box Friction (lb)

Tubing
Tubing Diameter (in)
  Tubing Stretch (in)
1.07
Tubing Anchor Distance (ft) 
 

Pump
Plunger Diameter (in)
Pump Stroke (in)
126.46
Pump Efficiency (%)
Pump Fill Ratio (%)
Pump Friction (lb)

Calculate