FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to the equipment for operation of underground wells and, in particular, to the system of variable flow resistance. In a hydrocarbon production well there is a need to control the flow of fluid mixes from geological layer into a well. Such control provides, for example, the possibility of prevention of formation of water or gas cone in a layer, minimization of sand production, minimization of water and/or gas production, maximizing oil production and/or gas, balancing of production between zones. The system of variable flow resistance comprises the flowing chamber for passing through it of a fluid mix. This chamber has in essence a cylindrical wall. There is, at least, one input providing the possibility of intake of fluid mix into the named chamber. This input crosses the named cylindrical wall. There is an output providing possibility of discharge of fluid mix from the chamber. This output is located near the centre of the named chamber. Besides, there is, at least, one structure obstructing the cycling of fluid mix at the output.
EFFECT: improvement of control of fluid mix flow in an underground well.
49 cl, 24 dwg
