DRIVE OF OIL-WELL SUCKER-ROD PUMP Russian patent published in 2006 - IPC F04B47/02 

FIELD: oil producing industry; lifting of liquids from wells.

SUBSTANCE: proposed drive contains support derrick with lower and upper bases. Two hanging frames-platforms are arranged one over the other over lower base, and stationary frame-platform is arranged lower than upper base on which driven sprockets of chain traction drive are installed. Driving sprockets are fitted on upper hanging frame-platform on shafts with cantilever sections on which driven sprocket of drive are fitted, and driving sprockets of the latter are installed on common shaft connected with reduction unit-step-up gear and electric motor-generator mounted on lower hanging frame-platform. Hanging frames-platforms are independently anchored through flexible members on lower base of support derrick. Sprocket-block is fitted on platform of upper base dividing flexible tie into two branches, one of which is arranged coaxially with axis of well, being connected by ground rod, and the other, with crossmember. Hubs of each driven sprocket of chain drive are provided with splines, slots and projections of which are made in form of dovetail, and width of slots does not exceed thickness of projection. Thin-walled rigid gaskets placed in clearances between walls of slots and projections are fixed from longitudinal displacement by covers.

EFFECT: improved operation reliability, enlarged sphere of application.

7 dwg