Drilling EngineeringMud and Cementing
Upward Force at the Bottom of the Casing Shoe Formula
Upward Force at the Bottom of the Casing Shoe calculates upward force for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (A, DeltaP) 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, F_u equals 23,064.32108 lb.
Ain^2
72.759946875
DeltaPpsi
316.992
Inputs
A
in^2Area Below Casing Shoe
DeltaP
psiDifferential Pressure Between Cement and Mud
Outputs
F_u
lb
Upward Force
A
in^2
Area Below Casing Shoe
DeltaP
psi
Differential Pressure Between Cement and Mud
Source and review
reviewedFormulas and Calculations for Drilling, Production and Workover, Lapeyrouse, N.J. (2002)
Lapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Gulf Professional Publishing, Page 67.
Source