| 摘要 |
A separation method and apparatus are disclosed having particular application for effecting removal of sand from a production wellstream, enhancing the quality of recovered oil, gas and water output streams ( 12, 13, 14 ) and reducing erosion caused by entrained sand. The wellstream is passed initially through a cyclone separator ( 4' ) which separates substantially all the water and sand as underflow and substantially all the oil and gas as overflow. A gravity separator ( 11 ) separates the overflow from the cyclone separator ( 4' ) into oil, gas and water, and a further cyclone separator ( 17 ) separates the underflow from the first cyclone separator ( 4 ') into water and sand. |
