BIROTATORY BOREHOLE GENERATOR Russian patent published in 2011 - IPC E21B47/22 

FIELD: gas and oil production.

SUBSTANCE: disclosed borehole generator consists of protective case, of electrical connection, of at least one fixation unit, of rotor with hydro-turbines, of permanent magnets, of rotor generator and of fixed exciting coils. Between the hydro-turbine rotor and generator there is made an intermediate shaft. Magnets and exciting coils are of circular form and are laid inside a protective jacket alternatively and with axial gaps between them. Also, a multiplier is installed between the generator rotor or hydro-turbine rotor and the intermediate shaft. Magnet-permeable insertions are installed in radial slots of disks secured on the generator rotor. Fixed disks are arranged between exciting coils and permanent magnets. A magnetic clutch set between the rotor and intermediate shaft consists of a driving and driven half-clutches with magnet-permeable partition between them whereat the driving half clutch is connected to the hydro-turbine rotor, while the driven half-clutch is connected with the intermediate shaft. The generator consists of at least one compensator of pressure and heat expansion communicating with a cavity of the driving half-clutch.

EFFECT: high reliability, increased power at reduced dimensions of electric generator design.

8 cl, 7 dwg