TURBINE GENERATOR FOR POWERING DOWNHOLE EQUIPMENT Russian patent published in 2022 - IPC E21B47/12 

FIELD: well drilling.

SUBSTANCE: invention relates to the field of well drilling and can be used for powering autonomous bottomhole geophysical and navigation systems. Turbine generator for powering downhole equipment comprises an external rotor with a body and turbine blades, an internal stator with winding made on an axle; the external rotor is installed on an upper and a lower plain bearings. The upper plain bearing is covered by a fairing at the end. The stator winding is placed in a sealed body with screw grooves made on the outer surface thereof, and longitudinal grooves are made on the inner surface of the rotor, between the bearings, passing between the permanent magnets installed between the external rotor and the body. Two additional annular permanent magnets are installed, forming a magnetic suspension. The upper magnet is placed on the lower end of the upper plain bearing, and the lower magnet is installed in a transverse groove on the outer surface of the stator body. A washer made of an anti-friction material is installed on the inside of the fairing.

EFFECT: higher reliability and operating life of the turbine generator due to the reduced friction between structural elements, reduced wear of the rotating parts and dynamic modulation of the gap for supplying drilling mud between the rotor and the stator of the turbine generator.

5 cl, 4 dwg