Drilling EngineeringMud and Cementing
Tail Cement Sacks Required in Casing Formula
Tail Cement Sacks Required in Casing calculates sacks of tail cement required in casing for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (h_fc, C, Y_2) 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_c equals 33.206609 sk.
h_fcft
44
Cft^3/ft
0.8679
Y_2ft^3/sk
1.15
Inputs
h_fc
ftFeet Between Float Collar and Shoe
C
ft^3/ftCasing Capacity
Y_2
ft^3/skYield of Tail Cement
Outputs
N_c
sk
Sacks of Tail Cement Required in Casing
h_fc
ft
Feet Between Float Collar and Shoe
C
ft^3/ft
Casing Capacity
Y_2
ft^3/sk
Yield of Tail Cement
Source and review
reviewedKWS Docs. Calculations for the Number of Sacks of Cement Required.
Source