PUMPING SET Russian patent published in 2007 - IPC F04B47/08 

FIELD: mechanical engineering; pumps.

SUBSTANCE: device is designed for use in electrohydraulically driven pumping sets operating is equipment pumping out liquids from wells. Proposed pumping set is furnished with second plunger pump. Each plunger pump is installed in its space made in housing with possibility of connection with suction and delivery channels for handled liquid. It is made in form of fixed plunger and plunger sleeve fitted on plunger for displacement and provided with reduced-height belt on inner surface forming throttling clearance with outer surface of plunger. Control unit is made in form of two pilot spools and hydraulic distributor. Each pilot spool is connected with electrohydraulically operated pumping station by pressure and drain channels for handled liquid and by feedback channel with space of plunger sleeve of one of plunger pumps. Space of each plunger sleeve can be connected through hydraulic distributor with delivery and drain channels. Each pilot spool is additionally coupled with hydraulic distributor.

EFFECT: materially increased service life of pumping set.

1 dwg