CHECK VALVE FOR ELECTRIC SUBMERSIBLE PUMPS FOR HIGH-RATE WELLS Russian patent published in 2022 - IPC F16K15/04 E21B34/06 

FIELD: valves.

SUBSTANCE: non-return valve is designed as an accessory device in the installation of an electric centrifugal pump for the production of products from wells, mainly with large production capabilities (≥500 m³/day). The check valve is equipped with top and bottom subs, and in the top sub a shaped sleeve is installed with the possibility of replacement for a fixed grip of the ball-valve, and in the lower sub with the possibility of replacement there is a seat made of abrasive-resistant material with a wide passage opening, the lower end of the shaped sleeve facing into side of the saddle, equipped with at least four toothed modules to ensure unimpeded entry and exit of the ball-valve into the internal cavity of the figured cup, as well as to keep it from self-oscillations in the figured cup, and the ball-valve is made of abrasion-resistant ceramic material. In the upper part of the figured cup there are lateral through radial channels, at least three, at an angle α=30°…45° to the axis of rotation of the figured cup. Above the landing seat on the lower sub, a conical chamfer is made at an angle β=30°…45° to the axis of rotation of the check valve body.

EFFECT: invention is aimed at reducing high-speed flows in the internal cavity of the valve, eliminating zones of flow turbulence, expanding the cross-sectional area of hydraulic passages, protecting the shut-off element from direct abrasive action of the pumped product.

2 cl, 5 dwg