E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
137/14
E21B 43/34 (2006.01) B01D 19/00 (2006.01) E21B 43/00 (2006.01) G05D 16/00 (2006.01)
Patent
CA 1293425
ABSTRACT A method and apparatus to reduce the pressure of crude oil from an oil well, i.e. a mixture of hydrocarbon compounds, which is conventionally performed stepwise, which a momentary pressure drop occuring at each stage. According to the invention, oil is caused to flow radially inward in a chamber, which is formed by a rotating vessel which is only partly filled with rotating oil, whereby the pressure drop in the oil can occur relatively slowly. A free liquid surface is maintained in the chamber, and a certain gas pressure is maintained in the liquid free volume thereof, while evaporated hydrocarbon compounds are moved through a central gas outlet. By means of a special inlet device an increase in oil pressure is prevented when flowing through a channel radially outward in the vessel to the level from which it is to flow radially inward, which increase would happen if the oil was allowed to flow freely in the channel and simultaneously be completely entrained in that oil rotating with the vessel.
553018
Alfa-Laval Separation Ab
Borden Ladner Gervais Llp
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