PetroCalcHubFree
Browse
Drilling EngineeringDrilling HydraulicsCalculation record

Strokes per Minute Required for Target Annular Velocity Calculator

SPM=AV ACqoSPM=\frac{AV\,AC}{q_o}

Enter the declared drilling engineering inputs below to solve SPM. Variable definitions, units, the default calculation, and the available source trail are included on this page.

Tabular solver

Inputs

Defaults provide a quick field-unit example for the equation.

3 variables

Your input values and calculation stay in this browser.

Extended guidance in preparation

What is available in this record

This record provides the functioning calculator, formula, declared variables and units, a reproducible default result, and the available citation metadata. A separately written engineering interpretation has not yet been published for this calculation.

Formula reference

Formula, variables, and default calculation

SPM=AV ACqoSPM=\frac{AV\,AC}{q_o}

Reproducible default result

With the default values shown below, the calculation returns SPM = 75 strokes/min. Defaults demonstrate the implementation; they are not recommended field values.

AVft/min

150

ACbbl/ft

0.05

q_obbl/stroke

0.1

Input definitions

AV

ft/min

Target Annular Velocity

AC

bbl/ft

Annular Capacity

q_o

bbl/stroke

Pump Output

Output definitions

SPM

strokes/min

Pump Speed Required

AV

ft/min

Target Annular Velocity

AC

bbl/ft

Annular Capacity

q_o

bbl/stroke

Pump Output

Source and record status

Source metadata identifies the relationship implemented by the calculator. Check the cited edition, unit basis, and scope against the engineering case before operational use.

reviewed

Lapeyrouse, N.J. Formulas and Calculations for Drilling, Production and Workover, 2nd Edition, Page 12.

Open source reference