ELECTRIC CENTRIFUGAL PUMP INSTALLATION FOR OIL PRODUCTION AND PUMPING OF ASSOCIATED WATER TO FORMATION Russian patent published in 2012 - IPC E21B43/40 

FIELD: oil and gas industry.

SUBSTANCE: installation includes two-sector electric centrifugal pump driven with submersible electric motor located between sectors, packer separating upper and lower formations, seal sections located on both sides of submersible motor, connection pipe passing through the packer and connecting underpacker zone of the well to the inlet of pump lower section. At that, in order to pump the associated water separated in the well to below lying lost circulation horizon, the inlet of lower pump section is led out through the housing to above-packer space of the well by means of radial channels connected to cylindrical inlet cavity of the section. Pressure part of lower pump section is interconnected with underpacker space through side holes made in inner housing of the section, concentric cavity formed with inner and outer housings of the section and inclined radial channels connecting this cavity to under-packer space.

EFFECT: possibility of utilisation of associated water to lost circulation horizon without its lifting to the surface.

2 dwg