WO2023185011A1 - 一种耐高温隔热保温柔性复合管 - Google Patents

一种耐高温隔热保温柔性复合管 Download PDF

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Publication number
WO2023185011A1
WO2023185011A1 PCT/CN2022/133089 CN2022133089W WO2023185011A1 WO 2023185011 A1 WO2023185011 A1 WO 2023185011A1 CN 2022133089 W CN2022133089 W CN 2022133089W WO 2023185011 A1 WO2023185011 A1 WO 2023185011A1
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layer
heat
temperature
insulating
composite pipe
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French (fr)
Inventor
黄祥
陈江华
许斌
李蓉
牛铭昌
严志强
林豪
赵绍东
朱原原
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Jiangsu Zhengdao Ocean Technology Co Ltd
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Jiangsu Zhengdao Ocean Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/127—Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
    • F16L9/128—Reinforced pipes

Definitions

  • the utility model relates to the technical field of heavy oil gathering and transportation, in particular to a high-temperature-resistant, heat-insulating and temperature-preserving flexible composite pipe.
  • Flexible composite pipes are widely used in oil fields and have become ideal anti-corrosion pipes in oil and gas fields because of their advantages such as good flexibility, large continuous length, high pressure bearing, and corrosion resistance.
  • it is a composite pipe that implements the standard of "Non-metallic composite pipes for the oil and gas industry - Part 2 Flexible composite high-pressure conveying pipes” (SY/T 6662.2), or it is a composite pipe that implements the "Non-metallic composite pipes for the oil and gas industry - Part 4 - Steel skeleton reinforcement" Thermoplastic Composite Coiled Pipes and Joints" (SY/T 6662.4) standard composite pipe.
  • the typical structure of various types of composite pipes usually consists of a three-layer structure of lining layer, reinforcement layer, and protective layer.
  • thermal insulation structure of typical structure composite pipes is not considered at the beginning of the design, when this type of composite pipes transport heavy oil, firstly, because the inner lining is usually made of polyethylene, it cannot adapt to heavy oil temperatures of 70-85°C or even 90°C for a long time. Under the working conditions, the failure of the composite pipe causes oil and gas leakage; secondly, the temperature drop along the composite pipe is large, the heat loss is high, the fuel loss is large, and the transportation cost is high.
  • the thermal conductivity of the cross-linked polyethylene foam insulation material is as high as 0.047W/m ⁇ K.
  • the cross-linked polyethylene foam insulation material must maintain a large thickness, causing the composite pipe wall to be too thick and the bending radius to be too small, making it inconvenient for coiling and transportation.
  • the present utility model provides a high-temperature-resistant, heat-insulating and heat-insulating flexible composite pipe.
  • the insulation capacity of the pipe is improved, which is beneficial to dealing with the problem of large temperature differences; the insulation layer uses silica gel.
  • Felt has good thermal insulation effect and takes up little space.
  • the high-temperature-resistant, heat-insulating and heat-preserving flexible composite pipe includes an inner lining layer, a reinforcing layer, an inner protective layer, a thermal insulation layer and an outer protective layer in order from the inside to the outside in the direction of the pipe diameter.
  • the inner lining layer is a fluid transport channel
  • the insulation layer includes a third wrapping layer
  • the third wrapping layer includes a silica airgel felt
  • the silica airgel felt is wrapped around the outside of the inner protective layer.
  • the thermal insulation effect is achieved through the good thermal insulation properties of the silica airgel felt.
  • the outer protective layer is located outside the insulation layer and is the protective layer of the composite pipe. It is preferably polyethylene resin or polyethylene resin that is wear-resistant, scratch-resistant, and resistant to chronic cracking. Other resin materials.
  • a fixing layer is provided between the thermal insulation layer and the outer protective layer; the fixing layer is located outside the thermal insulation layer, and is usually woven with high-strength fiber wire or stainless steel wire outside the thermal insulation layer to fix the thermal insulation layer.
  • the reinforcement layer includes a first winding layer
  • the first winding layer includes a steel cord belt or steel wire
  • the steel cord belt or steel wire is wrapped with resin
  • the steel cord belt or steel wire is forward and reverse. Wrapped in the inner lining; after being wrapped with steel wire wrapped in resin, the strength of the pipe is enhanced.
  • the resin on the first winding layer is melted and adhered to the inner lining layer, and a second winding layer is provided on the first winding layer.
  • the second winding layer has the same structure as the first winding layer; the second winding layer During the layer winding process, heating melts the resin of the first reinforcing layer, forming an integrated structure with the inner lining layer, reinforcing the inner lining layer, and then winding the second winding layer for reinforcement.
  • the material of the second winding layer is one of carbon fiber, polyethylene fiber, aramid fiber, basalt fiber or polyparaphenylenebenzobisoxazole fiber.
  • the winding angles of the first, second and third winding layers and the axis of the lining layer are all 55° ⁇ 5°.
  • the utility model solves the problem of blockage caused by temperature loss in heavy oil transportation and improves the efficiency of heavy oil transportation; due to the characteristics of silica airgel,
  • the composite pipe has a certain degree of flexibility; the reinforcement layer enhances the pressure-bearing capacity of the pipeline, which is conducive to widespread use in oil field transportation; the overall composite pipe occupies a small space and has good use effect, which is conducive to widespread use in oil field transportation.
  • Figure 1 is a schematic structural diagram of the utility model
  • a high-temperature-resistant, heat-insulating and temperature-preserving flexible composite pipe includes an inner lining layer 1, a reinforcing layer 2, and an inner protective layer 3 along the diameter direction from the inside to the outside. , insulation layer 4, fixed layer 5 and outer protective layer 6.
  • the inner lining layer 1 is located in the innermost layer of the composite pipe and is a fluid transport channel. Modified high-temperature resistant cross-linked polyethylene and polyvinyl chloride with higher temperature resistance are usually preferred. Vinyl fluoride, nylon 12, polyphenylene sulfide, or other high temperature resistant resin or modified resin materials.
  • the reinforcement layer 2 is located outside the lining layer 1 and is the main body of the composite pipe to bear pressure. It can be a single structure or a composite structure.
  • the reinforcing layer 2 includes a first winding layer, and the first winding layer includes high-temperature-resistant high-strength fibers, fiber ropes, or steel cord belts, steel wire rope belts, and steel wire belts coated with high-temperature resistant resin.
  • the steel cord strip or steel wire is wound on the inner lining layer 1.
  • the resin on the first winding layer melts and adheres to the inner lining layer 1, forming an integrated structure with the inner lining layer 1.
  • the first winding layer is provided with a second winding layer, so The second winding layer has the same structure as the first winding layer.
  • the material of the second winding layer is one of carbon fiber, polyethylene fiber, aramid fiber, basalt fiber or polyparaphenylene benzobisoxazole fiber, and polyester is selected. Industrial filament, glass fiber or other materials can be determined according to actual process requirements.
  • the insulation layer 4 includes a third wrapping layer, and the third wrapping layer includes a silica airgel felt.
  • the silica airgel felt is wrapped around the outside of the inner protective layer 3.
  • the specific thickness can be calculated and determined according to needs.
  • the winding angles of the first, second and third winding layers are all 50° ⁇ 10° to the axis of the lining layer 1.
  • the specific winding angles can be designed according to the specific use environment.
  • the fixing layer 5 is located outside the insulation layer 4 and is usually woven with high-strength fiber wire or stainless steel wire outside the insulation layer 4 for fixing the insulation layer 4 .
  • the outer protective layer 6 is located outside the insulation layer 4 and is the protective layer of the composite pipe.
  • This layer preferably has polyethylene resin or other resin materials that are wear-resistant, scratch-resistant, and chronic cracking resistant.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

本实用新型公开了一种耐高温隔热保温柔性复合管，包括：内衬层、增强层，内保护层、保温层、固定层、外保护层，所述内衬层为流体输送通道，所述保温层包括第三缠绕层，所述第三缠绕层包括二氧化硅气凝胶毡，所述二氧化硅气凝胶毡缠绕包裹在内保护层外部，所述内衬层与输送流体直接接触,在稠油高温条件下具有良好的适应性，是复合管的耐温主体；所述增强层具有高温条件下承压的稳定性和良好的耐老化特性，可以为单一增强层，也可为复合增强层；所述内保护层是增强层的保护层；所述保温层是复合管的保温主体，具有优异的保温性能，具有导热系数低、绝热性能好的优点；本实用新型具有管壁薄、便于运输、耐高温、隔热保温性能好等特点，可降低稠油管道输送中的热量损失。

Description

一种耐高温隔热保温柔性复合管 技术领域
本实用新型涉及稠油集输技术领域，具体涉及一种耐高温隔热保温柔性复合管。
背景技术
我国稠油资源分布广泛，统计资料表明，胜利油田、辽河油田、塔河油田、新疆油田、渤海油田等油田的稠油储量近300亿吨，具有很好的开发前景。但由于稠油具有密度高，胶质、沥青质含量高，常温流动性较差的缺点，大多稠油采取加热输送的方式，输送温度多在70℃-85℃之间，少量输送温度则高达90℃以上。稠油输送管道停运时间稍长可能导致原油降温失去流动性，管道停输再启动困难，甚至凝管堵塞，造成生产事故。为了减少热量损失，稠油输送管道外部往往需要包覆一定厚度的保温层。
柔性复合管因为具有柔性好、单根连续长度大、承压高、耐腐蚀等一系列优点，在油田广泛应用，成为油气田理想的防腐管材。但无论是执行《石油天然气工业用非金属复合管第2部分柔性复合高压输送管》(SY/T 6662.2)标准的复合管，还是执行《石油天然气工业用非金属复合管第4部分钢骨架增强热塑性塑料复合连续管及接头》(SY/T 6662.4)标准的复合管，各类复合管典型结构通常由内衬层、增强层、保护层3层结构组成。由于典型结构的复合管在设计之初未考虑保温结构，这类复合管在输送稠油时，一是由于内衬层通常采用聚乙烯材质无法长期适应于稠油70-85℃、甚至90℃的工况，复合管失效造成油气泄漏；二是复合管沿线温降大、热损高、燃料损失多，输送成本高。尽管现有一种以交联聚乙烯泡沫为保温材料的复合管，但由于交联聚乙烯泡沫 保温材料导热系数高达0.047W/m·K，用这样的材料制作复合管保温层输送稠油，为达到经济的输送条件，交联聚乙烯泡沫保温材料必须保持较大的厚度，造成复合管壁厚过厚，弯曲半径过小，不便于盘卷和运输。
实用新型内容
针对上述问题，本实用新型提供一种耐高温隔热保温柔性复合管,通过在复合管内增设保温层，提升了管道的保温能力，有利于应对温差大的问题；保温层采用二氧化硅凝胶毡，保温效果好，占用空间小。
本实用新型采用下述的技术方案：
一种耐高温隔热保温柔性复合管，所述耐高温隔热保温柔性复合管沿管径方向由内到外依次包括内衬层、增强层、内保护层、保温层和外保护层，所述内衬层为流体输送通道，所述保温层包括第三缠绕层，所述第三缠绕层包括二氧化硅气凝胶毡，所述二氧化硅气凝胶毡缠绕包裹在内保护层外部；通过二氧化硅气凝胶毡的良好的绝热性能实现保温效果，外保护层位于保温层外部，是复合管的保护层，优选具有耐磨、耐刮擦、抗慢性开裂的聚乙烯树脂或其他树脂材料。
优选的，所述保温层和外保护层之间设有固定层；固定层位于保温层外部，通常采用高强度纤维丝或不锈钢钢丝编织在保温层外部，用于固定保温层。
优选的，所述增强层包括第一缠绕层，所述第一缠绕层包括钢帘线带或钢丝，所述钢帘线带或钢丝上包裹树脂，所述钢帘线带或钢丝正反向缠绕在内衬层；通过树脂包裹的钢丝缠绕后，增强管道的强度。
优选的，所述第一缠绕层上的树脂熔融附着于内衬层，所述第一缠绕层上设有第二缠绕层，所述第二缠绕层和第一缠绕层结构相同；第二缠绕层缠绕的过程加热使第一增强层树脂熔融，与内衬层形成一体结构，加固内衬层，再缠 绕第二缠绕层加固。
优选的，所述第二缠绕层的材料为碳纤维、聚乙烯纤维、芳纶纤维、玄武岩纤维或聚对苯撑苯并双噁唑纤维中的一种。
优选的，所述第一、二和三缠绕层的缠绕角度与内衬层轴心线均呈55°±5°。
本实用新型的有益效果是：
本实用新型通过增加二氧化硅气凝胶毡缠绕的保温层，解决了稠油运输中存在的失温引起的堵塞问题，提高了稠油运输的效率；由于二氧化硅气凝胶的特性，让复合管道具有一定柔性；增强层增强管道承压能力，有利于广泛使用于油田运输；总体复合管的占用空间小，使用效果好，有利于广泛使用于油田运输。
附图说明
为了更清楚地说明本实用新型实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本实用新型的一些实施例，而非对本实用新型的限制。
图1为本实用新型结构示意图；
图中：
1-内衬层、2-增强层、3-内保护层、4-保温层、5-固定层、6-外保护层。
具体实施方式
为使本实用新型实施例的目的、技术方案和优点更加清楚，下面将结合本实用新型实施例的附图，对本实用新型实施例的技术方案进行清楚、完整地描述。除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“包括”或者“包 含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
下面结合附图和实施例对本实用新型进一步说明。
如图1所示，一种耐高温隔热保温柔性复合管，所述耐高温隔热保温柔性复合管沿管径方向由内到外依次包括内衬层1、增强层2、内保护层3、保温层4、固定层5和外保护层6，内衬层1位于复合管最内层，是流体输送通道，通常优选具有较高耐温性能的改性耐高温交联聚乙烯、聚偏氟乙烯、尼龙12、聚苯硫醚，或其他耐高温树脂或改性树脂材料。
增强层2位于内衬层1外部，是复合管压力承受主体，可以为单一结构，也可为复合结构。当增强层2为单一结构时，增强层2包括第一缠绕层，所述第一缠绕层包括耐高温高强度纤维、纤维绳或包覆耐高温树脂的钢帘线带、钢丝绳带、钢丝带，所述钢帘线带或钢丝缠绕在内衬层1上。
当增强层2为复合结构时，所述第一缠绕层上的树脂熔融附着于内衬层1，与内衬层1形成一体结构，所述第一缠绕层上设有第二缠绕层，所述第二缠绕层和第一缠绕层结构相同，第二缠绕层的材料为碳纤维、聚乙烯纤维、芳纶纤维、玄武岩纤维或聚对苯撑苯并双噁唑纤维中的一种，选用涤纶工业长丝、玻璃纤维或其它材料时可需根据实际工艺要求决定。
保温层4包括第三缠绕层，所述第三缠绕层包括二氧化硅气凝胶毡，所述二氧化硅气凝胶毡缠绕包裹在内保护层3外部，具体厚度可根据需要计算决定，第一、二和三缠绕层的缠绕角度与内衬层1轴心线均呈50°±10°，具体缠绕角度可根据具体使用环境设计。
固定层5位于保温层4外部，通常采用高强度纤维丝或不锈钢钢丝编织在保温层4外部，用于固定保温层4。
外保护层6位于保温层4外部，是复合管的保护层，该层优选具有耐磨、耐刮擦、抗慢性开裂的聚乙烯树脂或其他树脂材料。
以上所述，仅是本实用新型的较佳实施例而已，并非对本实用新型作任何形式上的限制，虽然本实用新型已以较佳实施例揭露如上，然而并非用以限定本实用新型，任何熟悉本专业的技术人员，在不脱离本实用新型技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本实用新型技术方案的内容，依据本实用新型的技术实质对以上实施例所做的任何简单修改、等同变化与修饰，均仍属于本实用新型技术方案的范围内。

Claims (6)

  1. 一种耐高温隔热保温柔性复合管，其特征在于，所述耐高温隔热保温柔性复合管沿管径方向由内到外依次包括内衬层(1)、增强层(2)、内保护层(3)、保温层(4)和外保护层(6)，所述内衬层(1)为流体输送通道，所述保温层(4)包括第三缠绕层，所述第三缠绕层包括二氧化硅气凝胶毡，所述二氧化硅气凝胶毡缠绕包裹在内保护层(3)外部。
  2. 根据权利要求1所述的一种耐高温隔热保温柔性复合管，其特征在于，所述保温层(4)和外保护层(6)之间设有固定层(5)。
  3. 根据权利要求2所述的一种耐高温隔热保温柔性复合管，其特征在于，所述增强层(2)包括第一缠绕层，所述第一缠绕层包括钢帘线带或钢丝，所述钢帘线带或钢丝上包裹树脂，所述钢帘线带或钢丝正反向缠绕在内衬层(1)。
  4. 根据权利要求3所述的一种耐高温隔热保温柔性复合管，其特征在于，所述第一缠绕层上的树脂熔融附着于内衬层(1)，所述第一缠绕层上设有第二缠绕层，所述第二缠绕层和第一缠绕层结构相同。
  5. 根据权利要求4所述的一种耐高温隔热保温柔性复合管，其特征在于，所述第二缠绕层的材料为碳纤维、聚乙烯纤维、芳纶纤维、玄武岩纤维或聚对苯撑苯并双噁唑纤维中的一种。
  6. 根据权利要求5所述的一种耐高温隔热保温柔性复合管，其特征在于，所述第一、二和三缠绕层的缠绕角度与内衬层(1)轴心线均呈55°±5°。
PCT/CN2022/133089 2022-03-31 2022-11-21 一种耐高温隔热保温柔性复合管 Ceased WO2023185011A1 (zh)

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