SUCKER-ROD DEEP-WELL PUMP Russian patent published in 2004 - IPC

FIELD: oil producing industry; oil well sucker-rod pumping units.

SUBSTANCE: proposed sucker-rod deep-well pump has sucker-rod string motion direction converter for operation within the limits of delivery valve working stroke and connected at one side with sucker-rod string and at other side, with rod provided with shock absorber insulated from action of aggressive medium. Intake channel in cylinder is located at level providing draining of liquid from tubing when fitting plunger on lower stop. Timely closing of delivery valve owing to said converter and possibility of easy opening of valve owing to hollow design provide faultless operation at higher efficiency when recovering high-viscosity paraffin0rich oils from inclined wells.

EFFECT: improved reliability in operation.

6 dwg