A hydraulic pumping unit

Abstract

The invention relates to the field of hydraulic device manufacturing, and in particular to a hydraulic oil pumping unit which comprises two hydraulic cylinders, wherein rear cavities of the two hydraulic cylinders are oppositely arranged and fixedly mounted; interiors of the two rear cavities are mutually communicated to form a cavity; front cavities of the two hydraulic cylinders are communicated through an oil tube; an oil hole is formed inside the side wall of the oil tube; the end parts of two piston rods of the hydraulic cylinders are positioned inside a same vertical straight line and move up and down in a reciprocation manner; the end parts of the two piston rods of the hydraulic cylinders are respectively fixed with a fixing device and the end part of an oil pumping rod; the rear cavities of the two hydraulic cylinders are respectively fixedly connected with two side end parts of a transition block; the transition block and the inner walls of the rear cavities of the two hydraulic cylinders form a cavity for accommodating air; an exhaust hole is formed in the transition block; the exhaust hole is communicated with the external environment.

Description

technical field [0001] The invention relates to the field of hydraulic device manufacturing, in particular to a hydraulic pumping unit. Background technique [0002] The traditional beam pumping unit is directly driven by an ordinary AC asynchronous motor. Its crank belt drives the sucker rod with counterweight and balance weight, and drives the downhole oil well pump to do up-and-down reciprocating motion in a fixed period, so as to send the downhole oil to the surface. This kind of equipment is cumbersome, and transportation and installation are relatively troublesome, especially on offshore oil production platforms, it is not allowed to use large-scale equipment. Moreover, the working principle of the pumping unit is to use a four-bar linkage mechanism to convert rotary motion into linear reciprocating motion. This type of structure will inevitably cause poor balance of the pumping unit during movement. On offshore oil production platforms, this type of pumping However,...

AI Technical Summary

Problems solved by technology

This kind of equipment is cumbersome, and it is troublesome to transport and install, especially on offshore oil production platforms, it is not allowed to use large-scale equipment

Moreover, the working principle of the pumping unit is to use a four-bar linkage mechanism to convert rotary motion into linear reciprocating motion. This type of structure will inevitably cause poor balance of the pumping unit during movement. On offshore oil production platforms, this type of pumping The unbalanced nature of machine motion is a serious and fatal problem

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