Oil well pump

• Main Authors: ZHAO ZEZONG, HU YARU, BI YUANLI, SUN XIANGXIAN, MA JUNWEI, ZHU JINGGANG, WU JIANCHAO, ZENG LINGRUI
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2023
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

According to the oil well pump, the technical problem that in the prior art, an oil well pump generates an airlock phenomenon during oil pumping is solved. The oil well pump comprises a pump cylinder, a plunger cylinder is arranged in the pump cylinder, the plunger cylinder is fixedly arranged in the pump cylinder, and an annular space is formed between the plunger cylinder and the pump cylinder and used for being communicated with an oil pipe on the pump. The plunger barrel is provided with a broaching section, and a gas collecting cavity used for collecting gas is formed in the broaching section; a plunger assembly is arranged in the plunger barrel, and an air inlet hole and an exhaust hole are formed in the plunger assembly; the plunger assembly comprises a plunger; a first valve assembly is arranged in the pump cylinder, a second valve assembly is arranged at the lower end of the first valve assembly, the first valve assembly is closed when the plunger moves upwards and opened when the plunger moves downw