Production EngineeringWell Performance
Average Upstroke Load - Sucker Rod Pump Formula
Average Upstroke Load - Sucker Rod Pump calculates average upstroke load for well performance workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (C, A_upper, A_lower, L) are known and the assumptions behind the cited well performance relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, AUL equals 5,000 lb.
Clb/in
200
A_upperin2
150
A_lowerin2
100
Lin
10
Inputs
C
lb/inDynamometer Calibration Constant
A_upper
in2Upper Area of Dynamometer Card
A_lower
in2Lower Area of Dynamometer Card
L
inLength of Dynamometer Card
Outputs
AUL
lb
Average Upstroke Load
C
lb/in
Dynamometer Calibration Constant
L
in
Length of Dynamometer Card
Source and review
reviewedGuo, B., Lyons, W.C. and Ghalambor, A. 2007. Petroleum Production Engineering: A Computer-Assisted Approach, Page 18/269.
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