DEVICE FOR FLUID FLOW CONTROL Russian patent published in 2014 - IPC E21B43/12 E21B21/08 

FIELD: mining.

SUBSTANCE: group of inventions relates to mining and can be used for the fluid flow control in the wellbore. The method comprises providing a hydraulic diode in the channel of hydraulic communication with the wellbore and the displacement of fluid through the hydraulic diode. At that the hydraulic diode is located inside the wellbore. The tool comprises a tubular diode sleeve having a diode opening, a tubular intrachannel sleeve mounted concentrically in the diode sleeve, and the intrachannel sleeve comprises an inner passage which is in hydraulic communication with the diode opening, and a tubular external channel sleeve inside which the diode sleeve is concentrically mounted. Moreover the external channel sleeve comprises an outer channel which is in hydraulic communication with the diode opening. And, in this tool the shape of the diode opening, the position of the inner channel relative to the diode opening and the position of the outer channel relative to the diode opening determine the resistance to the flow of the fluid flowing into the inner channel from the outer channel, and the other resistance to the flow of the fluid flowing into the inner channel from the outer channel.

EFFECT: increase of the efficiency of controlling the fluid flow in the wellbore.

19 cl, 13 dwg