Oil pumping device

• Main Authors: TONG JINGSHU, ZHOU XIAOYI, MENG YONGLI, PENG HUI, HU CHENGJUN, QIU FUSHOU, TONG YUBAO, WANG HONG, NIJIATI SAIMAITI, FAN YUXIN
• Format: Patent
• Language: English
• Published: 08.07.2015
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model provides an oil pumping device. The oil pumping device comprises a well mouth joint, an oil pumping rod piece and a gate polish rod sealing device, the oil pumping rod piece is arranged in the well mouth joint and the gate polish rod sealing device in a penetrating mode, the oil pumping rod piece comprises an oil pumping polish rod, a working rod and an oil pumping rod which are connected in sequence up and down, the oil pumping device further comprises a working short section, one end of the working short section is in sealed connection with the well mouth joint, the other end of the working short section is in sealed connection with the gate polish rod sealing device, the working short section is arranged on the outer side of the oil pumping rod piece in a sleeve mode, the oil pumping rod and the working rod are connected with each other through a working plunger, and a seal ring which is matched with an inner hole of the working short section is mounted on the outer side of the working plunger. According to the oil pumping device, the structure is simple, the design is reasonable, working is reliable, the polish rod and the gate polish rod sealing device can be replaced under pressure, safety and construction efficiency of borehole operation are improved, meanwhile, labor intensity is reduced, and large quantities of production costs are saved.