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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
50	41.64	189			9	2.9	24	7.2	34	10.4	52	15.7	96	29.3
75	62.46	284			14	4.3	35	10.8	51	15.5	77	23.6	144	43.9
100	83.28	379			19	5.7	47	14.3	68	20.7	103	31.4	192	58.5
125	104.10	473			24	7.2	59	17.9	85	25.9	129	39.3	240	73.1
150	124.92	568			28	8.6	71	21.5	102	31.1	155	47.1	288	87.8
200	166.56	757			38	11.5	94	28.7	136	41.5	206	62.8
225	187.38	852			42	12.9	106	32.3	153	46.6	232	70.7
240.5	200.28	910			45	13.8	113	34.5	164	49.8	248	75.6
275	229.02	1041			52	15.8	129	39.5	187	57.0	283	86.4
300	249.83	1136			57	17.2	141	43.0	204	62.2
400	333.11	1514			75	23.0	188	57.4	272	82.9
500	416.39	1893			94	28.7	235	71.7
600	499.67	2271			113	34.5	282	86.1
700	582.95	2650			132	40.2
800	666.23	3028			151	46.0
900	749.50	3407			170	51.7
1000	832.78	3785			189	57.5
1100	916.06	4164			207	63.2
1200	999.34	4542			226	69.0
1300	1082.62	4921			245	74.7
1400	1165.90	5299			264	80.5
1500	1249.17	5678

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