Drilling EngineeringMud and Cementing
Displacement Strokes to Bump Cement Plug Formula
Displacement Strokes to Bump Cement Plug calculates strokes required to bump cement plug for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (V_disp, PO) 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, N_stk equals 4,077.678571 strokes.
V_dispbbl
456.7
PObbl/stk
0.112
Inputs
V_disp
bblDisplacement Volume
PO
bbl/stkPump Output
Outputs
N_stk
strokes
Strokes Required to Bump Cement Plug
V_disp
bbl
Displacement Volume
PO
bbl/stk
Pump Output
Source and review
reviewedLapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, cementing calculations worked example.
Source