OIL TREATMENT METHOD Russian patent published in 2010 - IPC E21B43/34 

FIELD: oil and gas industry.

SUBSTANCE: oil is separated into fractions in rectification column, volatile compounds are directed to heat exchanger, then they are directed to condensate collector where liquid phase is separated and deposited to the bottom and vapour phase accumulated in upper part is separated. Water with temperature is discharged from the bottom of condensate collector. Above, from the level above water layer there discharged are liquid hydrocarbons C_6+above for further cooling in heat exchangers and accumulation in buffer separation capacity. Some portion of liquid hydrocarbons C_6+above is supplied to consumers, and the rest portion is supplied to oil flow entering the rectification column. Broad fractions of light hydrocarbons (BFLH) are directed from condensate collector to additional heat exchanger where they are cooled up to the temperature enough for condensation. Then condensed BFLH is directed to buffer separation capacity wherefrom BFLH is pumped out and some portion of BFLH is supplied to upper part of rectification column, and excess portion of BFLH is supplied to the store.

EFFECT: increasing the output of broad fraction of light hydrocarbons from oil.

1 ex, 2 dwg