HELICAL DOWNHOLE MOTOR Russian patent published in 2009 - IPC E21B4/02 

FIELD: motors and pumps.

SUBSTANCE: invention relates to spiral gerotor motor, used for drilling of oil and gas wells. Motor includes gerotor mechanism (1), containing stator (2) and rotor (3), number of claws of which per unit is less than number of stator claws (2), radial reference node input (4) and output (5) parts of motor, and also node of rotation transmission and axial load from rotor (3) on working shaft. Rotor (3) is installed on bearings of radial reference nodes of input (4) and output (5) parts of motor, herewith specified nodes are implemented with the ability of revolution of rotor (3) relative to stator (2) with eccentricity, equal to eccentricity of gerotor mechanism, and casing includes stator body and row of switchers.

EFFECT: it provides increasing of resource and coefficient of efficiency of motor by means of sequencing of movement and excluding of rotor disbalance during the operation process.

2 cl, 6 dwg