A well fluid separator tank for separation of fluid comprising water, oil and gas, use of such a tank, and a method for separating a well fluid including water, oil, and gas

摘要

The invention relates to a separator tank comprising an essentially cylindrical vertical tank, a tangentially arranged inlet, at least one outlet for oil and gas in the upper part of the tank, an outlet for water in the lower part of the tank, means for establishing a calm stream around the outlet for water; and an upward protruding conical frusta shaped wall dividing the tank into an upper part and a lower part with a first opening at the upper end of said upward protruding conical frusta shaped wall to allow communication between the upper and lower part of the tank, said conical frusta shaped wall being fixed to the wall of the tank at a position just below the position of the inlet opening, wherein said conical frusta shaped wall has a second opening at the level of the inlet.