DEEP-WELL PUMP DRIVE Russian patent published in 2001 - IPC

FIELD: oil industry; well operation. SUBSTANCE: drive of deep-well pump has housing arranged on wellhead. Housing accommodates electric motor mechanically coupled with drum with fitted-on flexible member one end of which is connected with pump working member placed in well. Drum drive shaft reversing mechanism is connected with accumulator. Birotary electric motor is used in drive. Archimedean spirals are made on truncated conical surface on drum. Spirals are connected by their vertices. Free end of flexible member is fastened on drum axle. Flywheel is used as accumulator. Reversing mechanism is made in form of servomotor with variable speed drive and left-hand and right-hands travel pickups functionally coupled with cable layer made for displacement along screw shaft connected mechanically with birotary motor. EFFECT: increased efficiency, simplified design, improved reliability. 1 dwg