Nozzle for sandblast fracturing

A nozzle and fracturing technology, which is applied in the field of formation fracturing devices, can solve the problems that the displacement of fracturing construction cannot be increased and affect the effect of fracturing reconstruction, and achieve the effects of improving production stimulation effect and high wear resistance.

Active Publication Date: 2014-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the problem brought about by improving the wear resistance of the nozzle is that the inner diameter of the nozzle will hardly increase during the sandblasting perforation period, which will lead to the failure of , the displacement of fracturing operation cannot be increased, which affects the effect of fracturing reconstruction

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  • Nozzle for sandblast fracturing

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] figure 1 The structure of a nozzle 10 for sandblasting fracturing (hereinafter referred to as nozzle 10 ) according to the present invention is schematically shown. The nozzle 10 includes a nozzle body 4 and a reinforcing layer arranged on the inner surface of the nozzle body 4 . exist figure 1 In the illustrated embodiment, the reinforcing layer comprises a first ceramic layer 3 directly adjacent to the nozzle body 4, an alloy steel layer 2 adjacent to the first ceramic layer 3 and a second ceramic layer adjacent to the alloy steel layer 2 1. During the fracturing construction process, part or even all of the reinforcement layer will be gradually worn away, so that the flow area of ​​the nozzle 10 will increase, and the production stimulation effect of hydraulic sandblasting fracturing will be improved. A connection structure is also provided on the outer surfac...

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Abstract

The invention discloses a nozzle for sandblast fracturing. The nozzle for sandblast fracturing comprises a nozzle body and a reinforcing layer arranged on the inner surface of the nozzle body, wherein the reinforcing layer comprises multiple abrasion-resistant layers with different degrees of abrasion resistance, the abrasion-resistant layers include the first ceramic layer which is directly adjacent to the nozzle body, the alloy steel layer which is adjacent to the first ceramic layer and a second ceramic layer which is adjacent to the alloy steel layer, and the abrasion resistance of the second ceramic layer is higher than the abrasion resistance of the alloy steel layer. According to the nozzle for sandblast fracturing, the nozzle can be abraded properly during sandblast perforation, the strength of the nozzle can not be reduced seriously, and the discharge capacity can be improved during fracturing.

Description

technical field [0001] The invention relates to a formation fracturing device, in particular to a nozzle for sandblasting fracturing. Background technique [0002] Hydraulic sandblasting fracturing is a new method of oil and gas well stimulation proposed in recent years. In this method, sandblasting and perforation are first performed through the injector, and then the fracturing fluid flows out through the injector to perform formation fracturing. . For this reason, the nozzle of the injector becomes a key component of hydroblasting fracturing. [0003] In the prior art, in order to extend the service life of the nozzle, a lot of research has been done on the wear resistance of the nozzle. For example, the main material of the nozzle is selected as ceramics, and a metal shell is arranged outside the ceramics to avoid tensile stress, so that the nozzle is not easy to break and has a high service life. In addition, some nozzles use stainless steel or carbon steel as the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/114E21B43/26
Inventor 李奎为李洪春陈作卫然王海涛曲海吴春方
Owner CHINA PETROLEUM & CHEM CORP
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