Mover structure of submersible linear lifting power device

Abstract

The invention discloses a mover structure of a submersible linear lifting power device, and belongs to the field of machinery manufacturing of oil production equipment. The mover of the invention comprises a non-magnetic conductive core shaft, magnetic conductive isolating rings and permanent magnet iron rings, wherein the magnetic conductive isolating rings and the permanent magnet iron rings arealternately arranged on the non-magnetic conductive core shaft in the axial direction of the non-magnetic conductive core shaft; and the magnetic conductive isolating rings are in close contact withthe permanent magnet iron rings. The mover structure adopts the permanent magnet iron rings and the magnetic conductive isolating rings coupled to the permanent magnet iron rings in the limited pole pitch, and the increase of permanent magnets in volume enables the thrust to be greatly improved. The mover structure can also change the volume change by changing the structure of the permanent magnetiron rings so as to further greatly improve the thrust.

Description

technical field [0001] The invention belongs to the field of oil production equipment machinery manufacturing, and relates to a mover structure of a submersible linear lifting power device. Background technique [0002] According to the survey, the current beam pumping unit has a large beam volume, low efficiency, high power consumption, and waste of energy; A large number of reactive power operations are formed in the cycle, resulting in a large amount of waste of power consumption, and the system efficiency is only 24%. In addition, due to the decline of underground energy in China, the water content of the oil field reached 89%, and the developed oil fields have entered the stage of extremely high water content; at the same time, due to the oil pumping characteristics of traditional pumping units with rod pumps, the structure is complex, and the eccentric wear of well pipes and rods is no longer good. The method is solved. According to the single wear of a single oil wel...

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Problems solved by technology

[0002] According to the survey, the current beam pumping unit has a large beam volume, low efficiency, high power consumption, and waste of energy; A large amount of reactive power is formed in the cycle, resulting in a large amount of waste of power consumption, and the system efficiency is only 24%.

In addition, due to the decline of underground energy in China, the water content of the oil field reached 89%, and the developed oil fields have entered the stage of extremely high water content; at the same time, due to the oil pumping characteristics of traditional pumping units with rod pumps, the structure is complex, and the eccentric wear of well pipes and rods is no longer good. The method is solved. According to the single wear of a single oil well in a domestic oil field, the cost of replacing the well pipe and rod and maintenance is as much as 30,000 yuan. On the other hand, among the newly developed reserves, low permeability, ultra-low permeability, and tight oil, The special lithology ratio reaches 80%, and the implementation of inclined wells, horizontal wells and large well longitudinal layouts just limits the use of existing traditional equipment

[0003] Moreover, due to the inherent defects in the structure of traditional equipment, it is impossible to achieve a good seal at the wellhead, and the flood area is flooded, which will inevitably produce a large amount of ground oil, which will have an adverse impact on the ground and water surface, especially the "new two Since the promulgation of the Law, frequent leakage accidents of traditional equipment cannot meet the requirements of current laws and regulations

[0004] Based on the above problems, although the current domestic reciprocating submersible electric pump technology has partially solved the problem of low-permeability and small-displacement oil recovery, it has not yet solved the problem of low-stroke, high-thrust and large-displacement; it cannot even meet the current downhole operating conditions. , the non-working frequency of periodic intermittent operation is too high, and the adjustable frequency range of periodic continuous working load is too narrow

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