Elastic plunger sealing oil well pump

• Main Authors: WANG WEIMING, MA BAOZHONG, MA JIPO, CHEN SHENGCAI
• Format: Patent
• Language: Chinese; English
• Published: 30.07.2019
• Subjects: BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model discloses an elastic plunger sealing oil well pump which comprises an upper joint, an oil outlet valve cover, a pump cylinder, a lower joint, a traveling valve and a standing valve,and is characterized in that a central pipe and an elastic plunger are arranged in a cavity of the pump cylinder; the lower end of the oil outlet valve cover is fixedly connected with the upper end ofthe sand scraping head; the lower end of the sand scraping head is fixedly connected with the upper end of the central pipe; a traveling valve is fixedly arranged at the lower end of the central pipe; the elastic plunger is arranged between the inner wall of the pump cylinder and the outer wall of the central pipe; a first sealing groove and a fourth sealing groove are formed in the outer walls of the upper end and the lower end of the center pipe respectively, sealing rubber rings are arranged in the first sealing groove and the fourth sealing groove, a through hole is formed in the side wall of the center pipe, and