Dual-chain drive pumping unit

Abstract

The invention relates to a pumping unit, in particular to a dual-chain drive pumping unit. The pumping unit comprises reverse wheels, balancing weights, chain wheels, chains, bolt cam follower needle roller bearings, a pumping rod, a reverse frame and steel wire ropes. The steel wire ropes are laid on the reverse wheels, one end of each steel wire rope is connected with the reverse frame, and the other end of each steel wire rope is connected with the balancing weight. The lower surface of the reverse frame is connected with the pumping rod. Bearing parts of the bolt cam follower needle roller bearings make contact with the reverse frame, and bolts of the bolt cam follower needle roller bearing are fixedly connected to hinge pins of the chains. The chains cover the two upper chain wheels and the two lower chain wheels, a U-shaped groove is formed in the reverse frame, a guide rail is arranged in the groove, the bolt cam follower needle roller bearings can roll on the guide rail, the two lower chain wheels are connected with an electromotor through a chain transmission device. The dual-chain drive pumping unit is large in stroke and load, high in pumping efficiency, small in reverse impact, and high in adaptability, and the reverse frame is long in service life.

Description

technical field [0001] The invention relates to an oil pumping unit, in particular to a double chain oil pumping unit. Background technique [0002] For a long time, beam pumping units have been mainly used in my country's oilfield development. Although beam pumping units are durable, they have low operating efficiency and high energy consumption, which cannot meet the development needs of "energy saving and consumption reduction". Moreover, in our country, it is difficult for conventional pumping units to achieve long stroke and large load, so there is an urgent need for a double-chain pumping unit with advantages such as long stroke, large load, high efficiency, and strong adaptability. The force point at the special chain link of the oil pump is not in the same plane as the sucker rod, which causes a large shear force on the reversing frame during the reversing process, and the reversing impact of the pumping unit is large, which affects the reversing shelf life. Conte...

AI Technical Summary

Problems solved by technology

[0002] For a long time, beam pumping units have been mainly used in my country's oilfield development. Although beam pumping units are durable, they have low operating efficiency and high energy consumption, which cannot meet the development needs of "energy saving and consumption reduction".

Moreover, in our country, it is difficult for conventional pumping units to achieve long stroke and large load, so there is an urgent need for a double-chain pumping unit with advantages such as long stroke, large load, high efficiency, and strong adaptability. The force point at the special chain link of the oil pump is not in the same plane as the sucker rod, which causes a large shear force on the reversing frame during the reversing process, and the reversing impact of the pumping unit is large, which affects the reversing shelf life

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