Enter the pump output and the annular capacity into the calculator to determine the annular velocity.
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Annular Velocity Formula
The following equation is used to calculate the Annular Velocity.
AV = PO * AC
- Where AV is the annular velocity (ft/min)
- PO is the pump output (bbl/min)
- AC is the annular capacity (bbl/ft)
To calculate annular velocity, multiply the pump output by the annular capacity.
What is an Annular Velocity?
Definition:
An annular velocity measures the linear rate of fluid (typically oil) moving through an annular drilling setup.
How to Calculate ?
Example Problem:
The following example outlines the steps and information needed to calculate the Annular Velocity.
First, determine the pump output. In this example, the pump output is found to be 12.5bbl/min.
Next, determine the annular capacity. In this case, the annular capacity is measured to be .25 bbl/ft.
Finally, calculate the Annular Velocity using the formula above:
AV = PO * AC
AV = 12.5 * .25
AV = 3.125 ft/min
