WELL GENERATOR Russian patent published in 2012 - IPC E21B47/00 H02K21/38 

FIELD: electric engineering.

SUBSTANCE: The invention relates to electric engineering and is used for supplying power to well equipment. The well generator is fitted with protective casing, electric socket, at least one attachment fitting, a rotor with a hydroturbine, permanent magnets and actuating coils, tightly fixed inside the protective casing. The hydroturbine is birotating. There is an additional rotor with permanent magnets fixed on its end faces, installed between the protective casing and the rotor. There is a disc with radial grooves fixed on the rotor, magnetic inserts are installed in these grooves. Furthermore, the disc is installed between actuating coils and permanent magnets. The second birotating turbine stage is fixed on the additional rotor. Another disc can be fixed on the rotor between the actuating coils and protective casing, the said disc can also be fitted with magnetic inserts. The inner generator space can be divided into two spaces: upper space and lower space. The upper space is filled with lubrication fluid. The top of the rotor can have a hole for feeding lubrication fluid to the upper space. The generator may contain at least one pressure and temperature expansion compensator, linked with the upper space.

EFFECT: increased reliability and power output of the generator while reducing size and weight.

6 cl, 6 dwg