SPOOL VALVE Russian patent published in 2024 - IPC F04B53/10 F16K15/02 F16K47/02 F16K1/36 F16K1/46 

FIELD: oil production industry.

SUBSTANCE: invention can be used as part of downhole pumping equipment for oil production, as well as in other branches of mechanical engineering. A spool valve comprises a body in which a shut-off element is located and a cylindrical seat is made, wherein the shut-off element is made in the form of a spool that forms a shut-off pair with the inner surface of the cylindrical seat thanks to a set of sealing rings movable in the axial and radial directions, sealed with elastic rings with a circular cross section, eccentrically shifted in pairs relative to each other by an angle of 360°/n, where n is the number of pairs of rings, whereas the elastic rings are placed on the spool in annular grooves made on its surface, the depth of which is less by 0.3-0.5 cross-sectional diameter of the elastic ring. The shut-off element at the bottom is equipped with a walk-through centralizer, and the lower part of the walk-through centralizer is made in the form of an annular stop, the outer diameter of which is larger than the inner diameter of the cylindrical seat, in addition, an additional wear-resistant metal seat is installed above the seat, and a conical support metal wear-resistant ring is fixed in the upper part of the shut-off element hermetically interacting with an additional metal wear-resistant seat in the lower position of the shut-off element, whereas the conical supporting metal wear-resistant ring with its large base faces the wellhead.

EFFECT: increased operational reliability of the valve by ensuring more reliable centring of the shut-off element, increasing the efficiency of the valve, by increasing the flow sections, reducing hydraulic resistance.

1 cl, 3 dwg