WELL SUCKER-ROD PUMP PLUNGER

摘要

FIELD: pumps used for recovery of oil and oil gas liquids from wells. SUBSTANCE: plunger has body 1 whose outer surface is coated with layer of flexible oil-resistant seal 2. Sealing rings 3 made in form of tension spring are fitted on seal 2 and are tightened on body 1 by means of valve unit 4 and sub 6. EFFECT: improved sealing; possibility of use in cylinders at non-linearity of channel axis.