DEVICE FOR UNLOADING SCREW SUBMERSIBLE PUMP AND ITS BEARING ASSEMBLY, END SEAL ASSEMBLY, SAFETY VALVE AND CAM CLUTCH Russian patent published in 2018 - IPC F04C2/107 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the oil industry. In the method, the unloading device of the screw submersible pump contains, in series arranged on drive shaft 14, the upper assembly of the mechanical seals, membrane assembly 11, the bearing unit, the lower unit of the mechanical seals and cam coupling 16 located on shaft 34 of drive of protector with the possibility of providing one-way communication with drive shaft 14. On shaft 14 in the upper and lower parts upper and lower nipples 5 and 15 are respectively arranged. In front of the bearing unit on shaft 14 after upper sliding bearing 10 membrane unit 11 is located. Nipple 5 is equipped with a safety valve assembly.

EFFECT: group of inventions is aimed at improving the technical and operational characteristics of the unloading device by reducing the weight and size parameters while increasing the operational reliability and, consequently, the service life.

6 cl, 5 dwg