DEEP-WELL SUCKER-ROD PUMP Russian patent published in 2005 - IPC

FIELD: oil producing industry.

SUBSTANCE: invention is designed for use in oil-well sucker-rod pumping units for producing high viscosity paraffin-rich oils from slanted wells. Proposed pump includes cylinder with intake channel connected with tubing string and plunger arranged in cylinder for reciprocation. Said plunger is made hollow and connected with drive string of pump sucker rods by means of rod centralized and adapter. Delivery valve is arranged in lower end of plunger. Ball is placed under valve seat in housing. Pump is furnished with sucker-rod string movement converter connected with sucker-rod string at one side, and with rod-pusher at other side for operation within the limits of working stroke of delivery valve ball for timely positive setting onto valve seat or removal from ball at place of operation of deep-well sucker-rod pump. Rod-pusher has weight corresponding to designed effort necessary for timely positive setting of ball of delivery valve in valve seat. Rod is connected with sucker-rod string movement converter to provide setting of ball of delivery valve in seat at designed force. Ball of delivery valve is made hollow.

EFFECT: improved reliability and efficiency of deep-well sucker-rod pump.

6 dwg