PLUNGER PUMPING MAGNETOHYDRAULIC UNIT Russian patent published in 2023 - IPC F04B47/08 E21B17/02 

FIELD: submersible pumps.

SUBSTANCE: unit comprises submersible motor 9 kinematically connected with oil pump 13, submersible plunger pump with rod 24, a hydraulic motor with rod 22 located inside oil tank 12. Between the hydraulic motor and the submersible plunger pump there is linear magnetic coupling 6 with media separator 11, made in the form of external and internal cylinders. Each cylinder is formed by permanent magnets 19 and 20 located one above the other with alternating direction of magnetization. Magnets 20 of the inner cylinder are rigidly fixed on the upper end of rod 22. Magnets 19 of the outer cylinder are rigidly fixed on pusher 21 inside it. Pusher 21 is made in the form of a hollow rod connected to rod 24. Separator 11 is made in the form of a pipe with a plug on one side, and on the other side is tightly connected to tank 12 body. Magnets 20 are located in the inner cavity of separator 11, and magnets 19 are on the outer side of separator 11. The oil pressure inside electric motor 9 and tank 12 is balanced with the formation fluid pressure.

EFFECT: improving the reliability of the unit and its service life.

1 cl, 3 dwg