Overall Diesel-to-Mud-Pump Efficiency Formula
Overall Diesel-to-Mud-Pump Efficiency calculates overall efficiency for drilling hydraulics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (eta_e, eta_l, eta_m, eta_v) are known and the assumptions behind the cited drilling hydraulics 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, eta_o equals 0.240975 fraction.
0.35
0.9
0.85
0.9
Inputs
eta_e
fractionEngine efficiency
eta_l
fractionElectric motor or line efficiency
eta_m
fractionMud pump mechanical efficiency
eta_v
fractionMud pump volumetric efficiency
Outputs
eta_o
Overall efficiency
eta_e
Engine efficiency
eta_l
Electric motor or line efficiency
eta_m
Mud pump mechanical efficiency
eta_v
Mud pump volumetric efficiency
Source and review
reviewed501 Solved Problems and Calculations for Drilling Operations, Robello, S.E. (2015)
Samuel, E. Robello. 501 Solved Problems and Calculations for Drilling Operations, Sigma Quadrant, Houston, Texas, 2015, Page 49.