Studying the Effect of Some Surfactants on Drag Reduction of Crude Oil Flow

Table 4

Maximum values of %Dr and %FI at 250 ppm concentration surfactant.

Additive type	Pipe diameter (m)	Flow rate (m^3/hr)	Max. %Dr1	Max. %Dr2	Max. %FI1	Max. %FI2
SDBS	0.0508	12.00	48.29	54.48	43.73	54.17
SLS	0.0508	12.00	44.46	47.30	38.19	42.23
SLES	0.0508	12.00	41.39	43.00	34.16	36.23
SS	0.0508	12.00	33.36	35.34	25.01	27.10
SDBS	0.0254	12.00	45.31	42.54	39.36	35.63
SLS	0.0254	12.00	42.48	40.51	35.55	33.06
SLES	0.0254	12.00	38.40	36.98	30.54	28.91
SS	0.0254	12.00	32.00	28.80	23.63	20.54
SDBS	0.0191	6.00	31.50	29.86	23.13	21.54
SLS	0.0191	6.00	27.40	26.58	19.26	18.52
SLES	0.0191	6.00	25.70	24.87	17.75	17.03
SS	0.0191	6.00	21.37	20.00	14.14	13.06