PROTECTION OF HYDRAULIC SUBMERSIBLE MOTOR GAGES (VERSIONS) Russian patent published in 2017 - IPC F04D13/10 H02K5/132 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the field of oil production and can be used in installations of oil-injected motors hydroprotection submersible centrifugal pumps, used for reservoir fluid production from wells. Hydraulic device to protect oil-filled submersible motor for downhole pump comprises a shaft, a head, thrust and radial bearings, at least one compensating module. The module includes a cylindrical body, the head, the nipple, the mechanical seal and the compensating element. The dynamic labyrinth placed head assembly including dynamic sleeve which is sealed to the shaft and the labyrinth sleeve fixedly mounted in the head, with a radial clearance relative to the shaft and the dynamic sleeve. The group of inventions aimed to reduce the consumption of materials and increase the device reliability.

EFFECT: inventions can prevent permanent contact containing dissolved gas reservoir fluid with the chamber of the compensating element; prevent reservoir fluid penetrating into the chamber containing the dielectric fluid; prevent scaling and wear of friction surfaces.

15 cl, 2 dwg