HORIZONTAL MULTISTAGE SECTIONAL CENTRIFUGAL PUMP UNIT Russian patent published in 2016 - IPC F04D1/06 F04D29/42 F04D29/62 F04D29/41 

FIELD: oil industry.

SUBSTANCE: invention is intended for water injection into oil formations and maintaining in-situ pressure and as a feed pump at oil deposits. Pump unit comprises horizontal multistage sectional centrifugal pump with cylindrical section housing, inlet end and pressure covers. Shaft is mounted in bearing spherical double-row roller radial thrust bearings and has end seals arranged in input and end covers. Housing is made in form of two separate parts, in each of which there are impellers and guide apparatus, a pressure cover is fitted between two parts of housing. Pump is equipped with transfer end cover to transfer fluid from first part of housing into second through transfer channels, made in discharge and transfer covers together with them. In transfer cover there is an additional end seal. Wheels in first and second parts of housing are arranged mirror-like to each other relative to pressure cover.

EFFECT: higher efficiency, reliability, repairability, service life without increasing cost of production due to reduction of vibration of pump.

14 cl, 5 dwg