| 摘要 |
The present application discloses an apparatus and a method for controlling fluid flow in or into a well, wherein the apparatus comprising: at least one housing (3m, 3g, 3w) having: an inlet (5); and at least one outlet (7, 7'), one of which is arranged in a top portion or a bottom portion of the housing (3m, 3g, 3w) when in a position of use; and a flow control means (9m, 9g, 9w) disposed within the housing (3m, 3g, 3w), the flow control means (9m, 9g, 9w) having a density being higher or lower than a density of a fluid to be controlled, and a form adapted to substantially block the outlet (7, 7') of the housing when the flow control means (9m, 9g, 9w) is in a position abutting the outlet (7, 7'). |
