Long stroke hydraulic pumping unit

Abstract

The invention discloses a long-stroke hydraulic pumping unit, comprising a frame, a sucker rod and a weight box which is provided with a counterweight, and also comprises an oil box, a liquid inlet and a hydraulic pump connected with the oil box, wherein, an outlet of the hydraulic pump is connected with an inlet of a hydraulic reversing valve; two outlets of the reversing valve are connected with a first hydraulic cylinder and a second hydraulic cylinder which are vertically arranged on the frame through pipelines respectively; a piston rod of the first hydraulic cylinder and a piston rod of the second hydraulic cylinder are connected with a first doffer bobbin winder and a second doffer bobbin winder which are arranged on the frame through a first carrying belt respectively, a first swift bobbin winder and a second swift bobbin winder which are provided with a second carrying belt respectively are coaxially arranged on the frame respectively with the first doffer bobbin winder and the second doffer bobbin winder; and the rocker rod and the weight box are connected with the second carrying belt respectively. With the adoption of the long-stroke hydraulic pumping unit, standardized and module production, low manufacturing cost and safer operation can be realized; moreover, the moving distance of the sucker rod is longer than the moving distance of the piston rod, thereby realizing long-stroke operation of the pumping unit, and reducing energy consumption.

Description

technical field [0001] The invention relates to an oil extraction equipment, in particular to a long-stroke hydraulic pumping unit. Background technique [0002] At present, the pumping units used in oil fields are divided into two categories: beam pumping units and beamless pumping units. The beam, the balance slider installed on the oil beam, the connecting rod connecting the beam and the crank, the belt connecting the crank and the reduction box, and the lifting rope connecting the sucker rod and the donkey head together constitute the pumping unit. Its main disadvantages are: It is high manufacturing cost, short stroke during operation, poor balance effect, low efficiency, high energy consumption, long maintenance time, high cost, unsafe installation, operation and maintenance, and easy to hurt people. Every oil field has a pumping unit that hurts people The incident occurred; the structure of the beamless pumping unit is as follows: the pumping unit is composed of the fra...

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Problems solved by technology

[0002] At present, the pumping units used in oil fields are divided into two categories: beam pumping units and beamless pumping units. The beam, the balance slider installed on the oil beam, the connecting rod connecting the beam and the crank, the belt connecting the crank and the reduction box, and the lifting rope connecting the sucker rod and the donkey head together constitute the pumping unit. Its main disadvantages are: It is high manufacturing cost, short stroke during operation, poor balance effect, low efficiency, high energy consumption, long maintenance time, high cost, unsafe installation, operation and maintenance, and easy to hurt people. Every oil field has a pumping unit that hurts people The incident occurred; the structure of the beamless pumping unit is as follows: the pumping unit is composed of the frame, the lifting belt connecting the sucker rod and the weight box, the chain connecting the weight box and the reducer, and the belt connecting the reducer and the motor , its manufacturing cost is higher than that of the beam pumping unit, and the operating cost and maintenance cost are also high; in my country, the pumping unit has not been standardized and modularized, and different manufacturers have different products, so it is necessary to replace the pumping unit for maintenance bring difficulties

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