Hydraulic energy-saving multi-well pumping unit

Abstract

The invention discloses a hydraulic energy-saving multi-well pumping unit which comprises a hydraulic system, automatic reversing valves, an oil well sucker rod connector, a control cabinet and connecting pipelines, wherein at least two hydraulic cylinders are connected with a hydraulic pump through the connecting pipeline; each hydraulic cylinder is a double-acting hydraulic cylinder; the automatic reversing valves are respectively arranged on an inlet pipeline and an outlet pipeline of the hydraulic pump; lower push-in cylinders of all the double-acting hydraulic cylinders are communicated with one another; upper push-in cylinders of the hydraulic cylinders are divided into two relatively-balanced parts; each part is connected with the automatic reversing valve through the pipeline and is communicated with the inlet pipeline and the outlet pipeline at two ends of the hydraulic pump through the pipelines; and a connector connected with an oil well sucker rod is arranged at the lower end of a lower piston rod at the lower part of a hydraulic cylinder piston. The hydraulic energy-saving multi-well pumping unit has the advantage of low manufacturing cost and provides a powerful support for the popularization of an exploiting and energy-saving technology of an oil field; and compared with the traditional beam-pumping unit, the hydraulic energy-saving multi-well pumping unit is adopted to save steel by 40-90 percent, save energy by 30-70 percent and ensure that the stroke is 0-8 meters and the stroke frequency is 1-20 times.

Description

technical field [0001] The invention belongs to an oil pumping unit of oil exploitation equipment. In particular, it relates to a hydraulic energy storage pumping unit. Background technique [0002] The traditional pumping unit has the advantages of simple structure, strong and durable. However, the traditional pumping unit is a purely mechanical movement, which needs to be self-balanced. The balance depends on the heavy mechanical balance. , high energy consumption, and can only complete its working cycle according to certain parameters (such as stroke, stroke times, etc.) that are not easy to change during operation. It is difficult to achieve reasonable coordination between surface equipment and downhole equipment. In order to reduce energy consumption, the patent application No. ZL200920032400.5 discloses an intelligent energy-saving hydraulic internal balance pumping unit for sister wells. The effect of reducing energy consumption; but this equipment can only be used...

AI Technical Summary

Problems solved by technology

[0002] The traditional pumping unit has the advantages of simple structure, strong and durable. However, the traditional pumping unit is a purely mechanical movement, which needs to be self-balanced. The balance depends on the heavy mechanical balance. , high energy consumption, and can only complete its working cycle according to certain parameters (such as stroke, stroke times, etc.) that are not easy to change during operation

It is difficult to achieve reasonable coordination between surface equipment and downhole equipment

In order to reduce energy consumption, the patent application No. ZL200920032400.5 discloses an intelligent energy-saving hydraulic internal balance pumping unit for sister wells. The effect of reducing energy consumption; but this equipment can only be used in sister wells, and multi-oil wells cannot be used, and the equipment is supported by traditional donkey head suspension, which is huge and expensive to manufacture

Patent application number ZL200920300405.1 discloses a multi-cylinder combined fully balanced hydraulic pumping unit, which can be used in multiple oil wells; and uses hydraulic technology to reduce energy loss during movement , but some cumbersome mechanical balances still need to be used in this equipment, not only the equipment is numerous, but also a lot of metal materials are wasted, which increases the cost of the product

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