PUMPING UNIT Russian patent published in 2005 - IPC

FIELD: oil producing industry.

SUBSTANCE: device is designed for mechanized recovery of oil and gas by well sucker-rod pumping units. Proposed pumping unit has base, Sampson post, double-arm rotary walking beam with flexible suspension of rod, crossmember with connecting rods, cranks with counterweights. Front counterweight in direction of movement has longitudinal slot with guides and disk-weight installed for movement square to axis of crank rotation. Mass of front counterweight with disk-weight is equal to mass of rear counterweight in direction of movement. Disk-weight can be fixed by means of stop pin for balancing the pumping unit. Stop pin is installed in holes of housing of front counterweight and disk-weight. Thanks to it torque on cranks at lifting of sucker-rod string is increased and dynamic loads on electric motor drive are equalized.

EFFECT: reduced power consumption, increased economy.

2 cl, 3 dwg