BOREHOLE TELEMETRY SYSTEM POWER SUPPLY GENERATOR Russian patent published in 2008 - IPC E21B47/12 

FIELD: machine building.

SUBSTANCE: invention relates to electrical machines and is designed to supply borehole appliances. The generator incorporates a protective casing, at least one attachment unit, an outer rotor with a hydraulic turbine and permanent magnets, an excitation winding hollow-shaft stator and a connector. An additional rotor shaft runs in bearings arranged in the said hollow shaft, an additional turbine being fitted on the said additional rotor. Additional permanent magnets are fitted on the said additional rotor shaft. The hydraulic turbines are arranged in a row in the generator top part to run in different directions. Wiring from the winding to the connector passes through the holes furnished in the stator. The generator inner space is filled with a lubricating fluid. The said fluid priming hole is arranged on generator top part, while the connector is attached from below.

EFFECT: higher generator output with lower weight and smaller sizes.

3 cl, 3 dwg