Core-annular flow process

Details Core-annular flow process Core-annular flow process

1987-11-02

1988-06-28

Cohan, Alan

Fluid handling

Processes

Affecting flow by the addition of material or energy

137268, F17D 116

Patent

active

047532610

ABSTRACT:
A process for transporting viscous oil in a pipeline is described which comprises placing a spherical sealed pig within the pipeline at a desired position; filling a fraction of the pipeline upstream of the pig with a low viscosity fluid such as water; and initiating core flow of a viscous oil such as a heavy or extra heavy crude oil after the first fraction has been filled. The process permits the core-flowed viscous oil to be transported in the same pipeline with a non-core-flowed fluid. To do this, a second pig is placed in the pipeline intermediate the core-flowed viscous oil and the non-core-flowed fluid and a second fraction of the pipeline intermediate the second pig and the core-flowed viscous oil batch is filled with a low viscosity fluid such as water.

REFERENCES:
patent: 3225787 (1965-12-01), Fogarty
patent: 3502103 (1970-03-01), Verschuur
patent: 3826279 (1974-03-01), Verschuur
patent: 3892252 (1975-07-01), Poettmann

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