DEVICE FOR HYDRAULIC PROTECTION OF SUBMERSIBLE OIL-FILLED ELECTRIC MOTOR Russian patent published in 2018 - IPC F04D13/10 H02K5/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil production and can be used for hydroprotection of submersible electric motors of electric centrifugal pumps for producing formation fluid from wells. Device for hydraulic protection of a submersible oil-filled electric motor comprises a head, a base, a body, a shaft with radial and thrust bearings, at least one compensating module, which includes a housing, a head, a nipple, an end seal and a compensating element. There is a pumping device made in the form of a dynamic bushing on the shaft under the face seal with at least one helical groove. Above the mechanical seal on the shaft is installed a pumping device in the form of a rotating bushing and/or a disk.

EFFECT: invention is aimed at simplifying the design without loss of reliability, improving the manufacturability of manufacturing and assembly.

8 cl, 6 dwg