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)
12.25
Pipe Size
(inches)
4.5
Hole Size
(inches)
8.5
Pipe Size
(inches)
4.5
Hole Size
(inches)
7.5
Pipe Size
(inches)
4.5
Hole Size
(inches)
6
Pipe Size
(inches)
3.5
Hole Size
(inches)
5
Pipe Size
(inches)
3.5
Flow
Rate US GPM
Flow
Rate MP GPM
Flow
Rate Ltr/min
Ann
Vel
Ft/min
Ann
Vel
Mtr/min
Ann
Vel
Ft/min
Ann
Vel
Mtr/min
Ann
Vel
Ft/min
Ann
Vel
Mtr/min
Ann
Vel
Ft/min
Ann
Vel
Mtr/min
Ann
Vel
Ft/min
Ann
Vel
Mtr/min
Ann
Vel
Ft/min
Ann
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