Lining oil pipe

Abstract

The utility model discloses a lining oil pipe, which relates to the technical field of pipeline transportation of petroleum, natural gas and the like, and comprises an oil pipe outer pipe, external threads are arranged on the outer side of the oil pipe outer pipe at equal intervals, a lining pipe main body is arranged inside the oil pipe outer pipe, and an adhesive is arranged between the inside of the oil pipe outer pipe and the outer side of the lining pipe main body. A protective layer is arranged on the outer side of the oil pipe outer pipe. According to the lining oil pipe disclosed by the utility model, the outer pipe of the oil pipe is made of a low-alloy high-strength steel material, so that the oil pipe has excellent mechanical strength and toughness and can stably operate under high-temperature and high-pressure conditions. The lining pipe body is jointly composed of the polyvinyl fluoride layer and the glass fiber reinforced polyester layer, polyvinyl fluoride has excellent chemical corrosion resistance, damage of a conveying medium to the pipeline is effectively prevented, and therefore the service life of the pipeline is remarkably prolonged. The outer protective layer of the oil pipe outer pipe is composed of a polyethylene coating and a polypropylene coating, and the coatings provide additional protection for the pipeline and enhance the wear resistance and impact resistance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipeline transportation of petroleum, natural gas and the like, and particularly relates to an inner lining oil pipe. BACKGROUND

[0002] The inner lining oil pipe for petroleum, natural gas and the like transportation generally refers to an oil pipe with an additional inner lining in a common transportation pipeline. Its main function is to improve the corrosion resistance and wear resistance of the pipeline, thereby prolonging the service life of the pipeline. The inner lining material is usually selected from materials with good chemical stability and physical properties, such as epoxy resin, polyethylene or other composite materials. The inner lining can protect the pipeline from the erosion of the transportation medium, reduce the risk of leakage and lower the maintenance cost. The inner lining oil pipe can also improve the transportation efficiency and reduce the frictional resistance, and its advantages are more obvious when transporting sand-containing or corrosive media.

[0003] In the process of oil and gas exploitation and transportation, the conventional oil pipe often leaks or fails due to chemical corrosion, wear and high temperature environment. In order to improve the durability and safety of the oil pipe, it is particularly important to develop an inner lining oil pipe with corrosion resistance. In view of the above problems, we have developed an inner lining oil pipe. SUMMARY

[0004] The utility model discloses an inner lining oil pipe which is improved in view of the existing structure and defects, and has better practical value.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] An inner lining oil pipe comprises an oil pipe outer pipe, an outer thread is equidistantly arranged on the outer side of the oil pipe outer pipe, an inner lining pipe main body is arranged in the inner part of the oil pipe outer pipe, an adhesive is arranged between the inner part of the oil pipe outer pipe and the outer side of the inner lining pipe main body, a protective layer is arranged on the outer side of the oil pipe outer pipe, the protective layer is composed of a polyethylene coating layer and a polypropylene coating layer, the oil pipe outer pipe is composed of a low-alloy high-strength steel material, and the inner lining pipe main body is composed of a polyvinyl fluoride layer and a glass fiber reinforced polyester layer.

[0007] In a preferred scheme, the protective layer is coated on the outer side of the oil pipe outer pipe.

[0008] In a preferred scheme, the polyethylene coating layer is arranged on the top of the polypropylene coating layer.

[0009] In a preferred scheme, the polyvinyl fluoride layer is arranged on the top of the glass fiber reinforced polyester layer.

[0010] In a preferred scheme, the adhesive is composed of silicone glue.

[0011] The oil pipe with an inner lining provided by this utility model has the following advantages:

[0012] Firstly, the outer pipe is made of low-alloy high-strength steel, possessing excellent mechanical strength and toughness, capable of meeting the requirements under high temperature and high pressure conditions and adapting to harsh working environments. The inner liner is composed of a polyvinyl fluoride layer and a glass fiber reinforced polyester layer. Polyvinyl fluoride exhibits excellent chemical corrosion resistance, effectively preventing the transported medium from corroding the pipeline, thereby significantly extending its service life.

[0013] Secondly, the outer protective layer of the oil pipe is composed of polyethylene coating and polypropylene coating. These coatings not only provide additional protection against the damage of the external environment, but also improve wear resistance and impact resistance, effectively preventing physical damage, thus forming a dual protection measure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of an inner-lined oil pipe proposed in this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram of an inner-lined oil pipe proposed in this utility model.

[0016] Figure 3 This is an exploded schematic diagram of an inner-lined oil pipe proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the internal layered structure of an inner-lined oil pipe proposed in this utility model.

[0018] In the attached diagram: 1. Outer tubing; 2. External thread; 3. Inner liner body; 4. Protective layer; 5. Adhesive; 6. Polyethylene coating; 7. Polypropylene coating; 8. Low alloy high-strength steel material; 9. Polyvinyl fluoride layer; 10. Glass fiber reinforced polyester layer. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that, in the context of use, the terms up, down, left, right, front, back, top, bottom, forward, reverse, clockwise, and counterclockwise in the following description are used merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative positions and / or orientations between the various parts of the object and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] It should be noted that, in practice, unless otherwise explicitly specified and limited, the terms "installation," "fixing," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a structural connection or a mechanical connection; a direct connection or an indirect connection via an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] It should be noted that these and subsequent accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection of this utility model. Furthermore, variations in different embodiments can be appropriately combined. The components of the embodiments described and marked in the accompanying drawings can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] The oil pipe disclosed in this utility model is mainly used in pipeline transportation scenarios.

[0024] Reference Figures 1 to 4 An inner-lined oil pipe includes: an outer pipe 1, external threads 2 evenly spaced on the outer side of the outer pipe 1, an inner-lined pipe body 3 inside the outer pipe 1, an adhesive 5 between the inner side of the outer pipe 1 and the outer side of the inner-lined pipe body 3, a protective layer 4 on the outer side of the outer pipe 1, the protective layer 4 being composed of a polyethylene coating 6 and a polypropylene coating 7, the outer pipe 1 being composed of low-alloy high-strength steel material 8, and the inner-lined pipe body 3 being composed of a polyvinyl fluoride layer 9 and a glass fiber reinforced polyester layer 10.

[0025] In the above technical solution, considering that traditional oil pipes often leak or fail due to chemical corrosion, wear, and high-temperature environments, the following specific operations are implemented to improve the durability and safety of the oil pipes: The outer pipe 1 is made of low-alloy high-strength steel material 8, which has good mechanical strength and toughness, can withstand high temperature and pressure, and adapt to harsh working environments. The inner liner body 3 is composed of a polyvinyl fluoride layer 9 and a glass fiber reinforced polyester layer 10. Polyvinyl fluoride has excellent chemical corrosion resistance, which can effectively prevent the transported medium from corroding the pipeline and extend its service life. The polyethylene coating 6 and polypropylene coating 7 on the outside of the outer pipe 1 constitute a protective layer 4, which not only provides additional protection against external environmental erosion, but also enhances wear resistance and impact resistance, prevents physical damage, and forms a double-layer protection. An adhesive 5 is placed between the inside of the outer pipe 1 and the outside of the inner liner body 3, which can ensure a tight bond between the two, effectively prevent the inner liner from falling off or moving during use, and enhance the stability of the overall structure. This oil pipe, by selecting specific materials, provides superior performance and usage effects.

[0026] Reference Figures 1 to 4 In a preferred embodiment, the protective layer 4 is coated on the outside of the outer pipe 1; the polyethylene coating 6 is disposed on top of the polypropylene coating 7; and the polyvinyl fluoride layer 9 is disposed on top of the glass fiber reinforced polyester layer 10.

[0027] Reference Figures 1 to 4 In a preferred embodiment, the adhesive 5 is composed of silicone sealant; silicone sealant has good high temperature resistance and excellent chemical resistance.

[0028] Working Principle: During use, the outer tubing 1 is constructed of low-alloy high-strength steel 8, possessing excellent mechanical strength and toughness, capable of withstanding high temperatures and pressures, and adapting to harsh working environments. The inner liner body 3 is composed of a polyvinyl fluoride layer 9 and a glass fiber reinforced polyester layer 10. Polyvinyl fluoride exhibits excellent chemical corrosion resistance, effectively preventing corrosion of the pipeline by the transported medium and extending its service life. The polyethylene coating 6 and polypropylene coating 7 on the outer side of the outer tubing 1 constitute a protective layer 4, providing additional protection against external environmental erosion, while also enhancing wear resistance and impact resistance, preventing physical damage, and forming a double-layer protection. An adhesive 5 is applied between the inside of the outer tubing 1 and the outside of the inner liner body 3, ensuring a tight bond between the two, effectively preventing the inner liner from detaching or shifting during use, and enhancing the overall structural stability. This tubing, through the selection of specific materials, provides superior performance and effectiveness. Contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. An inner-lined oil pipe, comprising an outer pipe (1), characterized in that, The outer tube (1) of the oil pipe is provided with external threads (2) at equal intervals on the outside. The inner liner body (3) is provided inside the outer tube (1). An adhesive (5) is provided between the inside of the outer tube (1) and the outside of the inner liner body (3). A protective layer (4) is provided on the outside of the outer tube (1). The protective layer (4) is composed of a polyethylene coating (6) and a polypropylene coating (7). The outer tube (1) of the oil pipe is composed of low alloy high strength steel material (8). The inner liner body (3) is composed of a polyvinyl fluoride layer (9) and a glass fiber reinforced polyester layer (10).

2. The inner-lined oil pipe according to claim 1, characterized in that, The protective layer (4) is coated on the outside of the outer tube (1) of the oil pipe.

3. The inner-lined oil pipe according to claim 1, characterized in that, The polyethylene coating (6) is disposed on top of the polypropylene coating (7).

4. The inner-lined oil pipe according to claim 1, characterized in that, The polyvinyl fluoride layer (9) is disposed on top of the glass fiber reinforced polyester layer (10).

5. The inner-lined oil pipe according to claim 1, characterized in that, The adhesive (5) is made of silicone sealant.

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