PLUNGER FOR WELL ROD PUMP

摘要

FIELD: oil industry. ^ SUBSTANCE: plunger comprises pipe and nozzles. The diameter of the nozzles varies. The space between the maximum diameter of the end ring projection of the nozzle and inner diameter of the cylinder that receives the plunger is equal or less than the half of the space between the plunger and pump cylinder. The minimum diameter of the ring projection allows the largest particles of admixture to pass through. ^ EFFECT: enhanced reliability and prolonged service life. ^ 1 dwg