Drilling EngineeringMud and Cementing

Cement Remaining in Casing Above Cementing Tool Formula

V_{csg}=(D_{set}-D_{tool})C_{csg}

Cement Remaining in Casing Above Cementing Tool calculates cement volume remaining in casing for mud and cementing workflows in drilling engineering.

Calculate

How engineers use this formula

Use this formula when the listed inputs (D_set, D_tool, C_csg) 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, V_csg equals 86.79 ft^3.

D_setft

3000

D_toolft

2900

C_csgft^3/ft

0.8679

Inputs

D_set

Casing Setting Depth

D_tool

Cementing Tool Depth

C_csg

ft^3/ft

Casing Capacity

Outputs

V_csg

ft^3

Cement Volume Remaining in Casing

D_set

Casing Setting Depth

D_tool

Cementing Tool Depth

C_csg

ft^3/ft

Casing Capacity

Source and review

reviewed

Lapeyrouse, N.J. 2002. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, calculations for the number of feet to be cemented.

Source