Drilling EngineeringMud and Cementing
Optimal Solids Removal Efficiency Formula
Optimal Solids Removal Efficiency calculates optimal solids removal efficiency for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (V_s, V_c) are known and the assumptions behind the cited mud and cementing 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_rs equals 0.808081 fraction.
V_sfraction
0.05
V_cfraction
0.2
Inputs
V_s
fractionExpected Drilled Solids Fraction in Drilling Fluid
V_c
fractionDrilled Solids Fraction in Discard
Outputs
eta_rs
fraction
Optimal Solids Removal Efficiency
Source and review
reviewed501 Solved Problems and Calculations for Drilling Operations, Robello, S.E. (2015)
Robello, S.E. 2015. 501 Solved Problems and Calculations for Drilling Operations, Sigma Quadrant, Page 192.
source conflict
Source