CAPITULO: Fluid Separators (Chapter 7)Closed vessels called separators are used to remove liquids from gases. Modern oil-field handling of crude oil includes metering for royalty and tax payments, wich requires that all nonsolution gas be removed from the crude oil prior to metering. In addition, sale of the dry gas in many cases is a source of considerable income. Oil-field lease separations range from the removal of slugs of oil from gas to dehydratation of the gas; however, in this chapter only the mechanical separation of gases and liquids is consiidered. Oil and gas separators handle large masses of material with a very high efficiency. For example, with a wellstream of 10 MMSCF per day of gas of specific gravity 0.7 and 1000 bbl per day of 35º API oil, the separator is handling 270 tons of gas and 150 tons of liquid per day. The usual oil-field separator allows a maximum liquid carryover of 0.10 gal of liquid per million standard cubic feet of gas, or a maximum of about 10 parts of liquid carryover per million of material handled.
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