FIELD: motors and pumps.
SUBSTANCE: invention is designed for oil industry to pump formation products out of oil wells. Tubing sucker-rod pump containing fixed barrel and movable plunger with metal rings, intake and traveling valves is provided with transition barrel preventing plunger working surface and metal rings damage during plunger running into pump barrel within production tubing. The pump is also provided with the adapter installed between production tubing and pump barrel to ensure free plunger displacement from transition barrels into pump barrel. The tubing pump output is increased and metal consumption is reduced. The piston traveling energy in upward direction is also reduced due to minimum effect of friction forces. Probability of piston grip is minimised.
EFFECT: increase of tubing pump output and reduction of metal consumption and piston traveling energy in upward direction.
1 dwg
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