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Impeller-guiding speed-changing swirling-flow anti-wax device

A technology of impeller and diversion impeller, which is applied in the direction of cleaning equipment, wellbore/well components, earthwork drilling and mining, etc., which can solve problems such as wax deposition, achieve the effects of simplifying the installation structure, increasing flow pressure, and delaying crystallization

Active Publication Date: 2018-01-05
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One object of the present invention is to provide an impeller-guided variable-speed swirl wax-preventing device, which is used to solve the problem of wax deposition in rodless oil production

Method used

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  • Impeller-guiding speed-changing swirling-flow anti-wax device

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention will be further described:

[0023] Such as figure 1 As shown, this impeller diversion type variable speed swirl wax prevention device includes a motor, a pulley assembly, and a hollow rod 17. The motor is connected to the hollow rod 17 through the pulley assembly, and the hollow rod 17 is suspended at the wellhead by the upper cross assembly. The rod 17 extends downwards into the oil pipe 19, the flange joint 7 is installed on the upper end of the hollow rod 17, the check valve 21 is installed on the lower end of the hollow rod 17, and the guide vane 18 is set at the position where the hollow rod 17 extends into the oil pipe 19 to guide the flow. The impeller 18 has blades, and when the guide impeller 18 rotates with the hollow rod 17, the guide impeller 18 will pressurize and increase the speed of the liquid production, forming a spiral flow of liquid, scouring and scraping the wax on the wall, and ...

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Abstract

The invention relates to an impeller-guiding speed-changing swirling-flow anti-wax device. The impeller-guiding speed-changing swirling-flow anti-wax device comprises a motor, a belt pulley assembly and a hollow rod, wherein the motor is connected with the hollow rod through the belt pulley assembly, the hollow rod is hung at a well opening through an upper four-way assembly, and extends to an oilpipe downwards, a flange joint is installed at the upper end of the hollow rod, a one-way valve is installed at the lower end of the hollow rod, and guiding impellers are arranged at the portion, extending into the oil pipe, of the hollow rod and provided with blades; when the guiding impellers rotate along the hollow rod, the guiding impellers generate the pressurizing effect and the speed increasing effect on produced liquid, and liquid flow spirally flowing is formed; precipitated wax of the wall surface is washed out and scraped, the flowing speed of the liquid flow is increased, and waxcrystals are carried; the rotating speed of the motor is controlled by a frequency-modulation speed-changing driving control cabinet. The impeller-guiding speed-changing swirling-flow anti-wax devicehas the function of preventing the wax crystals while the precipitated wax and formed scales are cleaned, the anti-wax and wax-cleaning aims are achieved accordingly, and the current rod-free oil recovery wax precipitation problem is solved.

Description

technical field [0001] The invention relates to the technical field of downhole tools for rodless oil production in the petroleum industry, in particular to an impeller flow-guiding type variable-speed swirling wax-preventing device. Background technique [0002] In the process of oil extraction, due to the high content of waxy and asphaltene components in the oil in the oil reservoir, or in the middle and late stages of oilfield exploitation, the light components in crude oil decrease, which also leads to high waxy and asphaltene content in the wellbore. During ground transportation, due to the decrease of temperature and pressure, the wax in the crude oil precipitates in the form of crystals, accumulates and settles on the wall of the pipe wall and the wall of the sucker rod, that is, the phenomenon of wax deposition in the wellbore of the oil well occurs. Waxing in oil wells will cause blockage of oil wells, affect production, and serious accidents such as production shut...

Claims

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Application Information

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IPC IPC(8): E21B37/00E21B37/04
Inventor 冯子明姜民政张玉会马云阔李红梅郭晨浩
Owner NORTHEAST GASOLINEEUM UNIV
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