ELECTRIC MOTOR AND RELATED SYSTEM FOR PLACEMENT IN FLUID AT BOTTOMHOLE (VERSIONS) Russian patent published in 2014 - IPC E21B4/04 F04B47/06 H02K33/16 H02K41/02 

FIELD: oil and gas industry.

SUBSTANCE: claimed group of inventions is referred to oil producing equipment, in particular, to controls of the oil-well pumping unit. In one of the variants the electric motor comprises a set consisting of at least three magnets, two external magnets and internal magnet located between the above external magnets having inner surfaces with identical poles and outer surfaces with identical poles. At that the alternating current source is designed to change polarity of one magnet out of the one internal and two external magnets thus providing the round trip for one internal and two external magnets and delivery of output power in the form of linear movement for the drive of the existing operational devices. In another variant two adjacent fixed magnets and at least one movable magnet join each other. The alternating current source is connected to the magnets so that polarity of one of the above magnets is changed thus providing delivery of output power in the form of linear movement for the drive of the existing operational devices. The suggested variants of the oil-well pumping system design are suggested for mechanised extraction with the process pump and the above electric motor.

EFFECT: improving operational reliability of the pump unit in wells of small diameter.

24 cl, 8 dwg