Drilling EngineeringMud and Cementing
Internal Hydrostatic Pressure While Landing Cement Plug Formula
Internal Hydrostatic Pressure While Landing Cement Plug calculates internal hydrostatic pressure for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (rho_cem, L_shoe, rho_disp, L_disp) 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, P_int equals 150.9667 psi.
rho_cemppg
14.8
L_shoeft
40
rho_dispppg
8.9
L_dispft
260
Inputs
rho_cem
ppgCement Slurry Density
L_shoe
ftCement Length in Shoe Joint
rho_disp
ppgDisplacement Fluid Density
L_disp
ftDisplacement Fluid Length Above Float Collar
Outputs
P_int
psi
Internal Hydrostatic Pressure
rho_cem
ppg
Cement Slurry Density
L_shoe
ft
Cement Length in Shoe Joint
rho_disp
ppg
Displacement Fluid Density
L_disp
ft
Displacement Fluid Length Above Float Collar
Source and review
reviewedDrilling Manual. Cementing Calculations - 7 Steps & Spreadsheets.
Source