FIELD: soil or rock drilling; mining.
SUBSTANCE: group of inventions relates to a device and method for controlling flow for a wellbore. Device comprises main pipe, filter, coupling and at least one deflector. Main pipe has a through hole for transfer of fluid medium and forms at least one hole for movement of fluid medium into the through hole. Filter is located on the main pipe and filters the fluid medium outside the main pipe. Coupling is located on the main pipe adjacent to the filter and has at least one flow channel for fluid communication from the filter to at least one hole in the main pipe. Clutch flange extends downstream of at least one flow channel and closes at least a portion of the main pipe upstream of at least one opening. At least one deflector is located on the flange and changes the direction of the flow leaving at least one flow channel from the longitudinal direction to the transverse direction before providing the flow into the at least one inner chamber in fluid communication with at least one hole.
EFFECT: technical result consists in improvement of efficiency of flow rate control.
20 cl, 10 dwg
