US Patent 10443344 Downhole valve system

The present invention relates to a downhole valve system (1) for controlling inflow of a fluid from and to a formation (100), comprising a casing (2) having an inner surface (3), an outer diameter (ODc) and an inner diameter (IDc), and a cross section (Ac) defined by the inner diameter, the casing comprising a plurality of valves (4, 4a, 4b, 4c) arranged spaced apart from each other for controlling the flow of the fluid to and from the formation through the casing, and a plurality of autonomous operating adjusting devices (5) each controlling one of the plurality of valves and each autonomous operating adjusting device comprising a body (6) having an outer body diameter (Db) and a body cross section (Ab), the plurality of autonomous operating adjusting devices being fastened inside the casing in order to allow the fluid to flow between the outer body diameter of the body of the autonomous operating adjusting device and the casing. The present invention furthermore relates to a method for controlling an inflow of fluid by controlling a plurality of valves in a downhole valve system according to the present invention.