PUMPING UNIT Russian patent published in 2007 - IPC F04B47/02 

FIELD: oil production, particularly to operate wells provided with sucker-rod pumps.

SUBSTANCE: pumping unit comprises frame, post with hinged support adapted to receive rocking beam provided with head so that the rocking beam may move in longitudinal direction. Pumping unit also has crank mechanism with drive. Hinged support is provided with sliding means and longitudinal rocking beam movement mechanism. Sliding means is made as spring-loaded rollers resting upon support plane of rocking beam body. Rocking beam movement driving mechanism is made as manual worn-and-rack drive. Hinged support and rocking beam are connected with each other by means of screw hinged lock.

EFFECT: decreased labor inputs, increased productivity and safety of well head zone freeing before well repair and preventive maintenance, simplified pumping unit structure.

2 cl, 6 dwg