PROTECTOR FOR HYDRAULIC PROTECTION OF SUBMERSIBLE OIL-FILLED ELECTRIC MOTOR Russian patent published in 2003 - IPC

FIELD: oil producing industry. SUBSTANCE: invention relates to submersible electric pumping units. Proposed protector comprises housing, shaft with end seals and support bearings, nipples, pivot unit head with intake strainer and base. Nipples with support bearings are arranged along shaft between head and base to form hydraulic seal chambers filled with electric motor oil. Pivot unit with shaft support is located in lower part of protection being combined with base unit base unit. Pressure relief and gas evacuation system is made in form of check values communicating through axial holes and connecting tubes. End seals are arranged in zone of nipples. Upper end seal is made twinned, with opposite arrangement of bellows. Invention is aimed at improving reliability of hydraulic protection of submersible oil-filled electric motor by means of no-diaphragm design pf protector providing separation of spaces of well and electric motor and compensation of oil pressure in motor. EFFECT: improved reliability. 1 dwg