Y-SHAPED BYPASS DEVICE OF SUBMERSIBLE PUMPING UNIT Russian patent published in 2020 - IPC E21B34/08 E21B43/12 

FIELD: oil industry.

SUBSTANCE: invention relates to oil submersible equipment and can be used in systems of bypass pumping units bypass as improved Y-Tool. Device comprises, on one side, two branches for connection of submersible pump unit and string of bypass pipes and common output on opposite side in head of Y-unit. Inside Y-unit with possibility of alternate overlapping of branches there is a back-folding internal check valve in form of disc. Back-folding internal check valve is equipped with a spring and fixed by means of an axis on a separate body, which is mounted in a branch with a connected string of bypass pipes. Along the periphery of the disk end surface external relative to the separate housing there is a projection in the form of a hollow segment of the canopy. Top of hollow segment of canopy is oriented upwards, and open cavity is directed towards disk axis.

EFFECT: improving operating reliability of the plant and enabling shutoff and sealing of the branch of the bypass pipes string at small flows of liquid flow.

1 cl, 4 dwg