REVERSE CHECK VALVE Russian patent published in 2023 - IPC F16K15/04 

FIELD: pipeline fittings.

SUBSTANCE: invention relates to pipeline fittings and is intended for use in the oil industry, namely in downhole equipment in the production of formation fluid, preventive maintenance, flushing and development of wells. The reversible check valve contains a cylindrical body with connecting threads at the ends, as well as a locking element in the form of a ball, while in the center of the body a conical recess is made, in which a seat for the locking element is placed in the form of a steel ball, above which a ball lifting limiter with a vertical groove is installed, which, with its wall, faces the body wall, and hangs over the ball with an inclined end. The inclined end of the limiter is made flat. A conical cavity in the form of a nozzle is made in the lower part of the housing. The outlet channel is formed by a vertical groove of the ball lift limiter and a smooth housing wall. The cross-sectional area of the outlet channel is greater than the cross-sectional area of the seat hole, and the axes of the inlet and outlet channels are parallel.

EFFECT: invention is aimed at reducing the hydraulic resistance to fluid flow.

1 cl, 5 dwg