Drilling EngineeringDrilling Hydraulics
Total Circulation Strokes from Drillstring and Annular Volume Formula
Total Circulation Strokes from Drillstring and Annular Volume calculates total circulation strokes for drilling hydraulics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (V_DS, V_AV, O) are known and the assumptions behind the cited drilling hydraulics 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, S equals 4,000 strokes.
V_DSbbl
100
V_AVbbl
300
Obbl/stroke
0.1
Inputs
V_DS
bblDrillstring Volume
V_AV
bblAnnular Volume
O
bbl/strokePump Output
Outputs
S
strokes
Total Circulation Strokes
V_DS
bbl
Drillstring Volume
V_AV
bbl
Annular Volume
O
bbl/stroke
Pump Output
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 104.
Source