Drag reducing composition and method

Details Drag reducing composition and method Drag reducing composition and method

1975-08-28

1977-04-12

Cohan, Alan

Fluid handling

Processes

Affecting flow by the addition of material or energy

252384, F17D 116

Patent

active

040168948

ABSTRACT:
Drag in turbulent aqueous streams is reduced by a powder composition of a finely divided hygroscopic drag reducing powder, for example poly(ethylene oxide), and a colloidal size hydrophobic powder, for example, an organosilicon modified colloidal silica, and an inert filler such as sodium sulphate. The powder composition is injected into the turbulent stream by first mixing the powder with water to form a slurry and immediately thereafter drawing the slurry through an eductor into a recycle stream between the downstream and upstream ends of a pump for the turbulent stream.

REFERENCES:
patent: 3730275 (1973-05-01), McClaflin
patent: 3884252 (1975-05-01), Kruka

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