An apparatus for separating fluids and controlling flow of production fluid includes a support structure configured including a fluid conduit and a tubular assembly disposed at the support structure. The tubular assembly includes an outer tube defining a flow path and having an outer tube inlet in fluid communication with the production fluid, and at least one inner tube disposed eccentrically within the outer tube. The support structure and/or the tubular assembly is configured to cause a centrifugal force on the production fluid that at least partially separates the production fluid into a first fluid portion having a higher concentration of high density fluid than an initial concentration, and a second fluid portion having a higher concentration of the low density fluid than the initial concentration of the low density fluid. One or more inner tubes have an inner tube outlet in fluid communication with the fluid conduit.