Annular Velocity Calculator

Annular velocity is the speed of a fluid's movement in a column called an annulus in wells being drilled with circulating drilling fluid.

It is commonly measured in feet per minute (ft/min) or meters per minute (m/min).

Enter your data here:Hole Size (inches): Pipe Size (inches): Hole Size (inches) 12.25Pipe Size (inches) 4.5Hole Size (inches) 8.5Pipe Size (inches) 4.5Hole Size (inches) 7.5Pipe Size (inches) 4.5Hole Size (inches) 6Pipe Size (inches) 3.5Hole Size (inches) 5Pipe Size (inches) 3.5
Flow Rate US GPMFlow Rate MP GPMFlow Rate Ltr/minAnn Vel Ft/minAnn Vel Mtr/minAnn Vel Ft/minAnn Vel Mtr/minAnn Vel Ft/minAnn Vel Mtr/minAnn Vel Ft/minAnn Vel Mtr/minAnn Vel Ft/minAnn Vel Mtr/minAnn Vel Ft/minAnn Vel Mtr/min
5041.6418992.9247.23410.45215.79629.3
7562.46284144.33510.85115.57723.614443.9
10083.28379195.74714.36820.710331.419258.5
125104.10473247.25917.98525.912939.324073.1
150124.92568288.67121.510231.115547.128887.8
200166.567573811.59428.713641.520662.8
225187.388524212.910632.315346.623270.7
240.5200.289104513.811334.516449.824875.6
275229.0210415215.812939.518757.028386.4
300249.8311365717.214143.020462.2
400333.1115147523.018857.427282.9
500416.3918939428.723571.7
600499.67227111334.528286.1
700582.95265013240.2
800666.23302815146.0
900749.50340717051.7
1000832.78378518957.5
1100916.06416420763.2
1200999.34454222669.0
13001082.62492124574.7
14001165.90529926480.5
15001249.175678