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Novel oil-well pump

An oil pump, a new type of technology, applied in the direction of pumps, pump components, variable displacement pump components, etc., can solve the problems of stuck pump, increase of plunger descending resistance, increase of leakage, etc.

Inactive Publication Date: 2013-12-18
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When ordinary oil well pump pumps crude oil with mixed gas, the submergence degree has obvious influence on the pump efficiency, but it is difficult to determine the appropriate submergence degree, so the pump efficiency is often low
During the working process, the complex stress environment will cause the radial deformation and bending of the pump barrel, which will not only increase the leakage and affect the pump efficiency, but also increase the downward resistance of the plunger, cause eccentric wear, and even pump jamming

Method used

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  • Novel oil-well pump

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Embodiment Construction

[0007] The upstroke sucker rod 5 drives the plunger 1 to move upward, as shown in Figure l(a). The volume of the pump chamber increases and the pressure decreases, the floating valve closes, the fixed valve opens, and the formation produced fluid enters the pump chamber. At this time, the outer pump barrel 4 shrinks under the action of the pressure difference inside and outside the pump chamber, while the pressure on the inner and outer walls of the inner pump barrel 3 is equal and does not deform.

[0008] Downstroke plunger 1 moves downward, as shown in Figure l(b). The volume of the pump chamber becomes smaller and the pressure rises, the fixed valve closes, and the plunger 7 of the floating valve opens under the action of high pressure at its lower end, and pushes the ball 10 of the floating valve, and the gas-liquid mixture in the pump chamber enters through the outlet smoothly. Oil pipe, there will be no lag in the opening of the floating valve or even the problem of "a...

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Abstract

The invention discloses a novel oil-well pump, which comprises a pump barrel assembly, a plunger assembly and a fixed valve assembly. When an ordinary oil-well pump is used for sucking gas-mixed crude oil, the pumping efficiency is low since the submergence depth is difficult to determine. A complex stress environment causes radial deformation and bending of a pump barrel during working, so that leakage is increased, the pumping efficiency is influenced, descending resistance of a plunger is increased, and the phenomena of eccentric wear and pump blocking are caused. In the novel oil-well pump, a pressure-bearing outer pump barrel is added outside an ordinary oil-well pump, and only one end of an inner pump barrel is fixed, so that radial deformation caused by stress of the inner pump barrel is avoided, additional leakage caused by the change of the gap between the pump barrel and the plunger is eliminated completely, and the pump has higher bending resistance and eccentric wear resistance. A traveling valve of the novel oil-well pump is formed by connecting a traveling valve carrier rod and a traveling valve ball in series, and the area of the lower end of the carrier rod is larger than the area of the inner hole of a traveling valve base, so that the opening pressure difference of the traveling valve of the pump is smaller than that of the traveling valve of an ordinary pump, negative influences of gas in the pump on the pumping efficiency can be reduced, and the phenomenon of ''airlock'' is avoided.

Description

technical field [0001] The invention relates to pump equipment, in particular to a novel oil well pump. Background technique [0002] When ordinary oil well pump pumps gas-mixed crude oil, the submergence degree has obvious influence on the pump efficiency, but it is difficult to determine the appropriate submergence degree, so the pump efficiency is often low. During the working process, the complex stress environment will cause radial deformation and bending of the pump barrel, which not only increases the leakage and affects the pump efficiency, but also increases the downward resistance of the plunger, causing eccentric wear, and even pump jamming. Contents of the invention [0003] The object of the present invention is to provide a new type of oil well pump to improve the pumping efficiency of lifting the gas-mixed crude oil under different submergence degrees in order to solve the above-mentioned existing problems. [0004] In order to achieve the above object, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B47/00F04B53/16F04B53/14F04B53/10
Inventor 苏少航王璐苗乃明何云松巢建伟
Owner CHANGZHOU UNIV
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