UNDERWATER PRODUCTION ASSEMBLY Russian patent published in 2013 - IPC F04C11/00 F04C13/00 F04D13/08 

FIELD: machine building.

SUBSTANCE: underwater production assembly comprises a pump 31 and a driving device 32 which is made tight from the ambient water and from process medium. The pump 31 and the driving device 32 are combined in one module fitted by a casing and are placed in a pressure casing 2. The pressure casing 2 is filled by the process medium and embraces the module casing 3. The casing 3 is protected against static contact with ambient water due to the process medium. Separation devices for the separation of liquid phase and gaseous phase of multiphase mixture are installed inside the pressure casing 2 and/or inside the casing 3. Recirculation channel from the pump 31 discharge chamber 312 or from pressure casing 2 to the pump 31 suction chamber 311 is provided for metered supply of separated liquid phase to the suction chamber 311.

EFFECT: creation of underwater production assembly for hydrocarbons which works reliably and prevents environmental damages due to leakages, with no negative effect on operability and reliability.

8 cl, 1 dwg