CN219655465U - Corrosion-resistant conveying pipeline for shale gas fracturing - Google Patents
Corrosion-resistant conveying pipeline for shale gas fracturing Download PDFInfo
- Publication number
- CN219655465U CN219655465U CN202320873582.9U CN202320873582U CN219655465U CN 219655465 U CN219655465 U CN 219655465U CN 202320873582 U CN202320873582 U CN 202320873582U CN 219655465 U CN219655465 U CN 219655465U
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- CN
- China
- Prior art keywords
- pipeline
- pipeline body
- corrosion
- shale gas
- gas fracturing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 23
- 230000007797 corrosion Effects 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000001175 rotational moulding Methods 0.000 claims abstract description 12
- 239000010426 asphalt Substances 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 238000010008 shearing Methods 0.000 claims description 16
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000003466 welding Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 10
- 239000002253 acid Substances 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009829 pitch coating Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model relates to a corrosion-resistant conveying pipeline for shale gas fracturing, which comprises a steel pipeline body, wherein a steel mesh is arranged on the inner surface of the pipeline body, a PE layer is further roll-coated on the inner surface of the pipeline body through a rotational molding process, and an asphalt coating is coated on the outer surface of the pipeline body. Adopt rotational moulding technology at this internal rotational moulding PE layer of pipeline, chemical stability is good, and corrosion-resistant ability is strong, and this internal surface of pipeline is provided with the one deck steel mesh through welding process, as the adhesion face on rotational moulding PE layer, it is more firm to be connected with the pipeline body, avoids pipeline body internal surface too smooth, and the PE layer easily drops, leads to pipeline body corrosion-resistant ability to reduce.
Description
Technical Field
The utility model relates to the technical field of oil and gas exploitation equipment, in particular to a corrosion-resistant conveying pipeline for shale gas fracturing.
Background
The fracturing is a method for forming cracks on hydrocarbon reservoir by utilizing the hydraulic action in the oil or gas extraction process, the fracturing method generally adopts hydraulic fracturing, liquid with certain viscosity is injected into the hydrocarbon reservoir along a pipeline with enough high displacement, and the injection molding speed is higher than the liquid absorbing speed of the hydrocarbon reservoir, so that the redundant liquid is pumped up to high pressure at the bottom of the well, and the hydrocarbon reservoir breaks on the well wall rock to form cracks. The existing fracturing fluid comprises water-based fracturing fluid, oil-based fracturing fluid, acid-based fracturing fluid and the like, and when the acid-based fracturing fluid is adopted, the existing pipeline injection can cause overlooking of the inner wall of the pipeline and reduce the service life of the pipeline because the acid-based fracturing fluid has certain corrosiveness.
Disclosure of Invention
In view of the above, it is desirable to provide a corrosion resistant conveying pipe for shale gas fracturing.
The utility model provides a shale gas fracturing is with corrosion-resistant pipeline, includes the pipeline body of steel, pipeline body internal surface is provided with the steel mesh, pipeline body internal surface still has one deck PE layer through rotational moulding technology roll coating, pipeline body surface is scribbled the pitch coating.
Preferably, a plurality of salient points are arranged on the outer surface of the pipeline body, and the asphalt coating wraps the pipeline body and the salient points.
Preferably, through holes are formed in steel bars on one surface of the steel mesh, which is connected with the pipeline body.
Preferably, the upper end of the pipeline body is connected with an upper joint, the upper joint comprises a flange plate and a shearing ring sleeve, the upper end of the shearing ring sleeve is connected with the flange plate, and the lower end of the shearing ring sleeve is provided with a step opening matched with a port of the pipeline body.
Preferably, a sealing groove is formed in the end face of one end, away from the shearing ring sleeve, of the flange plate, a lining cylinder is arranged in the middle of the flange plate, and the lining cylinder is communicated with the shearing ring sleeve.
Preferably, the pipe body is made of carbon steel or stainless steel.
The utility model has the advantages that: adopt rotational moulding technology at this internal rotational moulding PE layer of pipeline, chemical stability is good, and corrosion-resistant ability is strong, and this internal surface of pipeline is provided with the one deck steel mesh through welding process, as the adhesion face on rotational moulding PE layer, it is more firm to be connected with the pipeline body, avoids pipeline body internal surface too smooth, and the PE layer easily drops, leads to pipeline body corrosion-resistant ability to reduce.
Drawings
FIG. 1 is a schematic perspective view of a corrosion-resistant conveying pipeline for shale gas fracturing in one embodiment;
fig. 2 is a schematic cross-sectional view of a corrosion-resistant conveying pipeline for shale gas fracturing.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1-2, the corrosion-resistant conveying pipeline for shale gas fracturing comprises a steel pipeline body 1, wherein a steel net 2 is arranged on the inner surface of the pipeline body 1, a PE layer 3 is further roll-coated on the inner surface of the pipeline body 1 through a rotational molding process, and an asphalt coating 4 is coated on the outer surface of the pipeline body 1. Specifically, in this embodiment, the pipe body 1 is a circular pipe, and the pipe body 1 is made of carbon steel or stainless steel, and the carbon steel has low cost, but the service life is not longer than that of stainless steel, and the stainless steel has high cost. Further, be provided with steel mesh 2 in pipeline body 1, concretely can adopt welding process to connect, as inside lining attach point, steel mesh 2 surface and pipeline body 1 internal surface laminating, use rotational moulding machine to fuse PE plastic particle on pipeline body 1 internal surface, can form one deck corrosion-resistant PE layer 3, and scale deposit is not, be difficult for growing microorganism, can guarantee the purity of carrying acid group fracturing fluid etc. advantage, be ideal anticorrosive pipeline, and in order to improve the adhesion between PE layer 3 and pipeline body 1, the applicant adds one deck steel mesh 2 between the two, can strengthen the adhesion of PE layer 3, avoid because pipeline body 1 internal surface is too smooth, can flow through high-pressure high-speed acid group fracturing fluid in the pipeline body 1, PE layer 3 can drop under its drive, lead to pipeline inside corrosion resistance to reduce. Meanwhile, the pipeline is inserted into the soil, and in order to avoid corrosion of the pipeline body 1 by acidic substances in the soil, the asphalt coating 4 is smeared on the outer surface of the pipeline body, so that the cost of the asphalt coating 4 is low, and the corrosion prevention effect is good. When the detection of the difficultly-soluble substances in the local soil is carried out, double protection of asphalt and zinc spraying can be used, and a zinc salt protection layer can be formed. The protective layer can effectively protect the pipeline from corrosion and prolong the service life.
As shown in fig. 1-2, the outer surface of the pipe body 1 is provided with a plurality of protruding points 11, the asphalt coating 4 wraps the pipe body 1 and the protruding points 11, specifically, the protruding points 11 are welded on the outer surface of the pipe body 1, and the roughness of the outer surface of the pipe body 1 is increased, so that the asphalt coating 4 attached to the pipe body is not easy to fall off.
Specifically, the through holes are formed in the steel bars on one side, connected with the pipeline body 1, of the steel mesh 2, so that when the PE layer 3 is formed by rotational molding, the molten PE layers in a plurality of small grids formed by the steel mesh 2 are filled, the molten PE layers in adjacent grids are communicated through the through holes, the independent existence is avoided, the whole structural strength is higher after the steel mesh 2 is fully coated by the full PE layers, and the high-pressure and high-speed acid-based fracturing fluid scouring resistance of the pipeline body 1 is stronger.
As shown in fig. 1-2, the upper end of the pipe body 1 is connected with an upper joint 5, the upper joint 5 comprises a flange plate 51 and a shearing ring sleeve 52, the upper end of the shearing ring sleeve 52 is connected with the flange plate 51, and the lower end of the shearing ring sleeve 52 is provided with a step opening matched with the port of the pipe body 1. Specifically, the upper joint 5 is used to be communicated with a pipeline of a pump truck, the flange plate 51 is connected with the pipeline through bolts, a shearing ring sleeve 52 is arranged at the lower end of the flange plate 51 to strengthen the tightness between the upper joint 5 and the connection of the pipeline body 1, the port of the pipeline body 1 is in step-type butt joint, and then the outer ring layer is welded, so that the high-pressure high-speed acid fracturing fluid can not directly act on a welding seam when flowing through the pipeline, and the seepage of the welding seam is avoided.
As shown in fig. 1-2, a sealing groove 511 is formed on an end surface of the flange plate 51, which is away from the shearing ring sleeve 52, a lining cylinder 512 is arranged in the middle of the flange plate 51, and the lining cylinder 512 is communicated with the shearing ring sleeve 52. Specifically, the seal groove 511 is disposed on the outer ring of the liner 512, and is used for interference fit with a seal ring when the pipeline of the pump truck is communicated, so that the liner 512 is sleeved in the pipeline of the pump truck, and can play a supporting role when a hose is adopted.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (6)
1. The utility model provides a shale gas fracturing is with corrosion-resistant pipeline which characterized in that: the pipeline comprises a steel pipeline body, wherein a steel mesh is arranged on the inner surface of the pipeline body, a PE layer is further roll-coated on the inner surface of the pipeline body through a rotational molding process, and an asphalt coating is coated on the outer surface of the pipeline body.
2. A corrosion resistant transportation pipeline for shale gas fracturing according to claim 1, wherein: the outer surface of the pipeline body is provided with a plurality of salient points, and the asphalt coating wraps the pipeline body and the salient points.
3. A corrosion resistant transportation pipeline for shale gas fracturing according to claim 1, wherein: and through holes are formed in steel bars on one surface of the steel mesh, which is connected with the pipeline body.
4. A corrosion resistant transportation pipeline for shale gas fracturing according to claim 1, wherein: the upper end of the pipeline body is connected with an upper joint, the upper joint comprises a flange plate and a shearing ring sleeve, the upper end of the shearing ring sleeve is connected with the flange plate, and the lower end of the shearing ring sleeve is provided with a stepped opening matched with a port of the pipeline body.
5. The corrosion-resistant conveying pipeline for shale gas fracturing according to claim 4, wherein: a sealing groove is formed in the end face of one end, away from the shearing ring sleeve, of the flange plate, a lining cylinder is arranged in the middle of the flange plate, and the lining cylinder is communicated with the shearing ring sleeve.
6. A corrosion resistant transportation pipeline for shale gas fracturing according to claim 1, wherein: the pipeline body is made of carbon steel or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320873582.9U CN219655465U (en) | 2023-04-18 | 2023-04-18 | Corrosion-resistant conveying pipeline for shale gas fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320873582.9U CN219655465U (en) | 2023-04-18 | 2023-04-18 | Corrosion-resistant conveying pipeline for shale gas fracturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219655465U true CN219655465U (en) | 2023-09-08 |
Family
ID=87856527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320873582.9U Active CN219655465U (en) | 2023-04-18 | 2023-04-18 | Corrosion-resistant conveying pipeline for shale gas fracturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219655465U (en) |
-
2023
- 2023-04-18 CN CN202320873582.9U patent/CN219655465U/en active Active
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