REVERSE VALVE Russian patent published in 2020 - IPC F16K15/04 E21B34/06 

FIELD: valve industry.

SUBSTANCE: invention relates to pipeline valves and is intended for use in oil industry, namely in downhole equipment during production of formation fluid, preventive works, flushing and development of wells. Reverse reversing valve includes cylindrical housing with connecting thread on ends, in housing there are two threads, lower thread for attachment of seat for shutoff element made in form of steel ball, and upper thread for attachment of ball lifting limiter. Seat for ball is made with conical cavity facing inlet of seat. In the ball lifting limiter there is an outlet channel, in parallel to the outlet channel there is a radial groove which hangs over the ball and protects it from vertical action of the flushing liquid, and also facilitates its movement into the upper part of the cavity, wherein the reaction force of the jet holds the ball in the upper part of the cavity during the entire period of passage of liquid through the reverse valve.

EFFECT: invention is aimed at improvement of reliability, reduction of hydraulic resistance and power consumption during pumping of liquid.

1 cl, 4 dwg