Method for reducing pressure drop in the transportation of drag

Details Method for reducing pressure drop in the transportation of drag Method for reducing pressure drop in the transportation of drag

1988-10-11

1989-11-21

Cohan, Alan

Fluid handling

Processes

Affecting flow by the addition of material or energy

F17D 116

Patent

active

048815667

ABSTRACT:
Method for reducing pressure drop in a conduit carrying a viscous drag reducing material by injecting a lower viscosity liquid which is immiscible with the drag reducing material at the periphery of the conduit to form a flowing annular layer of such lower viscosity liquid thereby reducing the pressure drop in the conduit.

REFERENCES:
patent: 3572354 (1971-03-01), Tinsley
patent: 3826279 (1974-07-01), Verschuur
patent: 4325397 (1982-04-01), Lofquist
patent: 4358572 (1982-11-01), Mack

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