Abstract: A fluid flow control device, which is for establishing a controllable fluid communication of a fluid flow between an external fluid reservoir and a base pipe of a production string, includes a primary flow path and a secondary flow path. The primary flow path is arranged inside a main housing. The primary flow path includes a primary flow path inlet configured to guide a primary fluid flow constituting a major portion of the fluid flow into the main housing during operation and a primary flow path outlet configured to guide the primary fluid flow from the main housing and into the base pipe during operation. The secondary flow path is configured to guide a secondary fluid flow constituting the remaining portion of the fluid flow.

Abstract: A fluid flow control device serving as an inflow port from a fluid reservoir (R) to the interior of a production pipe (S) is in the form of a housing (3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l). The housing has a primary flow path (18) and a secondary flow path (19). The secondary flow path is in fluid communication with a chamber (B) in which is arranged an actuator (5) for a valve device (4), the valve device arranged to open and close the primary flow path. At least one flow restrictor (1,2) is arranged in the secondary flow path, the flow restrictor arranged to provide a pressure to chamber (B) sufficient to actuate the valve to an open position when the fluid flowing through the secondary flow path is oil, and a pressure sufficient to actuate the valve to a closed position when the fluid has a viscosity and/or density less than oil.

Abstract: A fluid flow control device includes a housing having a fluid inlet (7) and at least one fluid outlet (8). A first fluid flow restrictor (1) serves as an inflow port to a chamber (B) in the housing, and a second fluid flow restrictor (2) serves as an outflow port from the chamber (B). The first fluid flow restrictor and the second fluid flow restrictor are configured to generate different fluid flow characteristics; and the chamber (B) includes an actuating device (5a-1) that is responsive to fluid pressure changes (?P2) in the chamber. The first fluid flow restrictor (1) and the second fluid flow restrictor (2) are configured to impose respective different fluid flow characteristics based on different fluid properties.

Abstract: A fluid flow control device includes a housing having a fluid inlet (7) and at least one fluid outlet (8). A first fluid flow restrictor (1) serves as an inflow port to a chamber (B) in the housing, and a second fluid flow restrictor (2) serves as an outflow port from the chamber (B). The first fluid flow restrictor and the second fluid flow restrictor are configured to generate different fluid flow characteristics; and the chamber (B) includes an actuating device (5a-1) that is responsive to fluid pressure changes (?P2) in the chamber. The first fluid flow restrictor (1) and the second fluid flow restrictor (2) are configured to impose respective different fluid flow characteristics based on different fluid properties.