Patent ID: 9359875
Filing Date: 2016-06-07
CPC Classification: E21B

Claim Text:
1. An artificial lift tool ( 1 ) configured for a wellbore or a casing and submerged in well fluid, the artificial lift tool extending in a longitudinal direction, a top end of the artificial lift tool adapted to be connected to a bottom end of a wireline, and the artificial lift tool comprising: a motor unit comprising a torque element configured to provide a torque output, a pump unit positioned below the motor unit in relation to the top end, the pump unit comprising: a housing extending in the longitudinal direction and having an upper section and a lower section ( a pump shaft integrally connected to the torque element of the motor unit and extending through the upper and lower sections of the housing, at least one pump stage connected to the pump shaft and comprising a rotor and a stator, at least one inlet positioned in the lower section, and a packer unit positioned on an outer surface of the housing, the packer unit being adapted to provide a circumferential seal in an annulus between the artificial lift tool and a side of the wellbore or the casing; a first main bearing adapted to absorb both axial and radial forces arranged in the upper section of the pump unit and connected with the pump shaft so that axial forces acting on the pump shaft are absorbed by the first main bearing, and a compensator pump fluidly connected to the main bearing; wherein: the compensator pump is configured to pressurize the main bearing; the pump shaft is configured to be supported by and suspended from the first main bearing during operation downhole.