Associated Gas Recycle
When crude oil is extracted from wells, it will contain significant quantity of dissolved hydrocarbon gas. This is usually known as associated gas. The start of the oil processing is to reduce the pressure of the oil stream and thus flash off dissolved gas. This can typically happen three times at reducing pressures, according to what the inlet pressure from the well is. This flashed gas needs to be then re-compressed for further dehydration and export to sales line pressure. We can use rotary vane, oil flooded screw and oil lubricated reciprocating compressors for this application.
