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Pulse jet generator, generating device, water injection and blockage removal integrated pipe column and method

A technology of pulse jet and generating device, which is applied in the fields of generating device, water injection and plugging removal integrated pipe string, and pulse jet generator, which can solve the problems of constant water flooding affected area, dependence on plugging removal effect, and high investment cost, and achieve expansion The effect of water flooding sweeping area, increasing action radius and action intensity, and reducing probability

Pending Publication Date: 2021-03-09
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pulse jet generator, generating device, integrated pipe string and method for water injection and plugging removal, so as to solve the problem of constant water drive sweep area and impurity blockage of pore throats caused by stable and continuous water injection in the prior art problems, and the problem that the plugging removal effect of using stable and continuous acid solution completely depends on the performance of chemical agents, and the input cost is relatively high

Method used

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  • Pulse jet generator, generating device, water injection and blockage removal integrated pipe column and method
  • Pulse jet generator, generating device, water injection and blockage removal integrated pipe column and method
  • Pulse jet generator, generating device, water injection and blockage removal integrated pipe column and method

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Embodiment approach 1

[0069] Such as figure 2 , image 3 , Figure 4 As shown, the present invention also provides a pulse jet generating device 10 for stratified water injection and plugging removal. The pulse jet generating device 10 includes a cylindrical first upper joint 2 and a cylindrical main body 3 that can be connected in series on the oil pipe. With the above-mentioned pulse jet generator 1, the upper end of the main body 3 is connected to the lower end of the first upper joint 2, and the upper end side wall of the main body 3 is provided with an installation cavity 31 communicating with the first upper joint 2, and in the side wall of the main body 3 A drain hole 32 is also provided, and the drain hole 32 extends from the bottom of the installation cavity 31 to the outer wall of the main body 3, and communicates the installation cavity 31 with the outside of the main body 3, and the pulse jet generator 1 is fixed in the installation cavity 31, and It communicates with the first upper...

Embodiment approach 2

[0086] Such as Figure 6 As shown, the present invention also provides a pulse jet generating device 10', which is used for general water injection and plugging removal. The jet generator 1 is fixed in the outer cylinder 5 , the stable continuous fluid flows into the pulse jet generator 1 through the upper inlet of the outer cylinder 5 , and the pulsed jet ejected from the third nozzle 13 is discharged through the lower outlet of the outer cylinder 5 .

[0087] In the present invention, general water injection is performed by setting a pulse jet generator 1 in the outer cylinder 5. The pulse jet generator 1 converts the stable continuous fluid into a pulse jet, increases the energy of the liquid, and overcomes the shortcoming of the small continuous energy of the stable continuous fluid. No additional energy action is required.

[0088] During general water injection, the pulse jet generator 1 causes the injected water to produce a pulse oscillation effect, so that the inject...

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Abstract

The invention provides a pulse jet generator, a generating device, a water injection and blockage removal integrated pipe column and a method. The pulse jet generator comprises a first nozzle, a second nozzle and a third nozzle which are sequentially arranged from top to bottom, wherein a first-stage oscillation cavity is formed between the first nozzle and the second nozzle; a second-stage oscillation cavity is formed between the second nozzle and the third nozzle; the first nozzle, the first-stage oscillation cavity, the second nozzle, the second-stage oscillation cavity and the third nozzlecommunicate with one another in sequence; and stable and continuous fluid flowing in from the first nozzle is converted into pulse jet when flowing through the first-stage oscillation cavity and thesecond-stage oscillation cavity and then is sprayed out from the third nozzle. According to the pulse jet generator, injected water and acid liquor enter a stratum in a fluctuation mode, the water drive swept area is enlarged, the probability that impurities block a pore throat is reduced, the chemical corrosion effect in acidification construction is not utilized singly during blockage removal, and the physical effect of pulses is improved.

Description

technical field [0001] The invention relates to the technical field of oil field water injection development, in particular to a pulse jet generator, a generating device, an integrated pipe string for water injection and blocking removal, and a method. Background technique [0002] In the process of water flooding reservoir development, water flooding swept area is a key factor affecting water flooding recovery. At present, the conventional water injection methods mainly include general water injection and layered water injection. Regardless of the method, the injected water is in a stable and continuous state. Long-term stable continuous flow injection will cause the following problems: On the one hand, the injected water will flow to the production well Convergence, it is easy to cause the phenomenon of tongue ingress. Under the condition of constant water flooding pressure, its water flooding swept area remains unchanged; The movement of the fixed flow channel blocks the...

Claims

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Application Information

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IPC IPC(8): E21B43/20E21B43/14E21B43/22
CPCE21B43/20E21B43/14E21B43/16
Inventor 李峰王喜泉麻德玉刘雪梅徐爽周广安李俊杞黄武鸣刘畅王燕蒋艳项鹏心燕鹏宇徐青竹丁一鸣孙放
Owner PETROCHINA CO LTD
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