ELECTRO-GENERATOR OF POWER SUPPLY FOR BOREHOLE EQUIPMENT Russian patent published in 2011 - IPC E21B47/00 H02N2/18 

FIELD: oil and gas production.

SUBSTANCE: magnetic clutch converts mechanical power into electrical. The device converting mechanical power into electrical one corresponds to a piezo-electric package with units of mechanical deformation on both sides of the package. The units of mechanical deformation are made as carriers mounted on a shaft; the carriers have axles and deforming rollers on them. The piezo-electric package is made as bimorph piezo-electric rings installed inside a protective case on a bushing. The magnetic clutch can be either an end-type, or cylinder-type. It consists of a driven and driving half-couplings and of a pressure-tight partition between them. The partition contains parts out of magnet-transparent material. Also, the driven half-coupling is connected to a rotor, while the driving half-coupling is connected to the shaft. A cavity of the driving half-coupling is filled with lubricating liquid, while cavities of the driven half-coupling and the device for converting mechanical power to electric power are united. They are pressure tight and are filled with lubricating liquid.

EFFECT: increased reliability and capacity of generator of power supply for downhole equipment at reduced diametre dimensions and weight of electric generator.

10 cl, 4 dwg