Bullheading Volume to Perforations Formula
Bullheading Volume to Perforations calculates volume to bullhead for well control workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (V_lines, V_surface_EOT, V_EOT_top, V_top_bottom) are known and the assumptions behind the cited well control 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_bh equals 135 bbl.
10
85
25
15
Inputs
V_lines
bblSurface Lines Volume
V_surface_EOT
bblSurface to End of Tubing Volume
V_EOT_top
bblEnd of Tubing to Top Perforations Volume
V_top_bottom
bblTop Perforations to Bottom Perforations Volume
Outputs
V_bh
Volume to Bullhead
V_lines
Surface Lines Volume
V_surface_EOT
Surface to End of Tubing Volume
V_EOT_top
End of Tubing to Top Perforations Volume
V_top_bottom
Top Perforations to Bottom Perforations Volume
Source and review
reviewedIADC WellSharp Formula Sheet, field units, well completion/workover bullheading formulae.
Source