WELL BOTTOMHOLE PUMP DRIVE Russian patent published in 2014 - IPC F04B47/02 

FIELD: oil and gas industry.

SUBSTANCE: drive includes mounted on the main frame body with an additional frame. It has mounted on an engine and a reduction gear, an enclosed mechanism converting rotational motion into reciprocating and containing a driving pulley, and a curved guide member with constant curve radius. The driven pulley is enveloped with a continuous flexure link joined with a carriage connected to counterbalance. Counterbalance is mounted in body guiding rails including the continuous flexure link and coupled through the flexure link with the rod hanging assembly. On the sides of the counterbalance there are wheels mounted with a possibility to interact with the guiding rails. Wheels on the main frame are provided for drive movement. The additional frame in installed on the guiding rails and fixers. The guiding rail cylinder secured on the additional frame is filled with balls. Another cylinder is fixed on the main fame, and the balls provide for rolling friction between the cylinders and movement of the additional frame without sticking and distortion. On the additional frame, there are combs, which during movement of the additional frame are locked in the fixing elements.

EFFECT: increased reliability and durability of drive due to constant automatic to the extent of sagging continuous flexure link.

2 cl, 4 dwg