Sand discharging oil well pump

• Main Authors: ZHAO YALI, QIU YUDI, YAN LIPENG, ZHOU YANGQI, ZHANG HONGBAO, GUO DINGXIONG, CHEN DAZHAO, CONG ZHIXIN, ZHANG JIANJUN, ZHANG XIN, CHEN LEI, XU LU, WANG XIAOJUN, KONG DONGLIANG, YU XIAOXI, LYU MIN, WANG WENMING, ZONG WEI
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2020
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The invention discloses a sand discharging oil well pump. The sand discharging oil well pump comprises an external connecting pipe, a travelling valve assembly, a fixing valve assembly, a sand settingcylinder and a sand filtering pipe. The external connecting pipe is connected with an oil pumping pipe. The travelling valve assembly is connected with an oil pumping rod, the travelling valve assembly and the fixing valve assembly are located in the external connecting pipe, and the lower part of the travelling valve assembly is located on the inner side of the fixing valve assembly. A first flow guide cavity is formed inside the fixing valve assembly, a first fixing valve and a second fixing valve are arranged on the lower portion of the fixing valve assembly, and a second flow guide cavityis formed between the fixing valve assembly and the external connecting pipe. A sand holding cavity is formed inside the sand setting cylinder and communicates with the second flow guide cavity. Thesand filtering pipe is conn