FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil production and can be used for hydraulic protection of submersible electric motors of electric-centrifugal pumps used for production of well fluid. Device for hydraulic protection of submersible electric motor includes shaft (1), head, base, thrust and radial bearings, at least one compensating module. Compensating module includes upper nipple (7) and lower nipple, connected by cylindrical casing, end seal (10) and compensating element dividing compensating module into two cavities. In upper nipple (7) under face seal (10) groove (17) is made, in which damping ring (18) is installed, contacting with shaft (1) without gap. Cavities (19 and 20) respectively above damping ring (18) and under it are not hermetically sealed relative to each other.
EFFECT: invention is aimed at improvement of reliability and service life of device for hydraulic protection of submersible electric motor due to optimization of end seal operation and its additional protection.
5 cl, 2 dwg
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