Beam-free sliding oil sucker with eccentric wheel

Abstract

A beamless sliding eccentric pumping unit used for mechanical oil recovery in oilfields. The bracket is a cuboid quilted frame structure. The suspension wheel and the balance wheel are respectively located at the left and right ends of the beam on the top of the bracket. The middle and left ends of the beam are provided with guide grooves. , the beam can move along the fixed bolt through the guide groove; the balance belt is connected with the balance box through the balance wheel, and the balance box moves up and down along the guide rope through two guide wheels; The upper end of the rod is connected, the central axis can move up and down along the slide rail, one end of the suspension belt is fixed on the eccentric wheel, and the other end is connected with the belt suspension through the suspension wheel; one end of the power belt is fixed on the bracket, and the other end is fixed on the power wheel ; The lower end of the connecting rod is connected with the crank pin on the reducer crank. The invention has the structural characteristics of the crank and connecting rod of the beam pumping unit, adopts a sliding eccentric mechanism, has a long stroke, is convenient for balance adjustment, is convenient to operate, saves electric energy, is convenient for workover operations, and is applicable to crude oil production needs of various oil fields.

Description

technical field [0001] The invention relates to oil field mechanical oil production equipment, in particular to a beamless sliding eccentric pumping unit. Background technique [0002] At present, in oil field mechanical oil production equipment, there are two types of beam pumping units and beamless pumping units. Among them, the patent number of "extended range long-stroke pumping unit with no beam chain" is ZL87103481. This pumping unit Although the range-extending wheel structure is adopted, the chain transmission is still used, which has the problems of easy damage to the chain and poor lubrication conditions, which affects the service life of the whole machine; another example is the patent number of "double variable diameter balance wheel pumping unit": ZL952246236, Although this type of pumping unit adopts the coaxial and eccentric structure of large and small variable diameter wheels, the stroke is still limited to a certain extent. Therefore, the existing technolog...

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Problems solved by technology

[0002] At present, in oil field mechanical oil production equipment, there are two types of beam pumping units and beamless pumping units. Among them, the patent number of "extended range long-stroke pumping unit with no beam chain" is ZL87103481. This pumping unit Although the range-extending wheel structure is adopted, the chain transmission is still used, which has the problems of easy damage to the chain and poor lubrication conditions, which affects the service life of the whole machine; another example is the patent number of "double variable diameter balance wheel pumping unit": ZL952246236, Although this type of pumping unit adopts the coaxial and eccentric structure of large and small variable diameter wheels, the stroke is still limited to a certain extent. Therefore, the existing technology cannot meet the needs of oil field production with long stroke, convenient operation and maintenance, and long service life.

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