An ultra-high molecular weight polyethylene oil pipe inner tube with anti-corrosion function

Abstract

The utility model discloses an ultrahigh molecular polyethylene oil pipe inner lining pipe with anticorrosive function, including setting in the inner lining pipe of steel oil pipe inboard, the inner lining pipe adopts ultrahigh molecular polyethylene to make, the inner lining pipe inboard is equipped with anticorrosive coating, anticorrosive coating is located the thickness of inner lining pipe lower part is greater than the upper part of inner lining pipe, the transition layer is equipped with between the inner lining pipe and steel oil pipe, the transition layer includes the bonding layer of the one side of steel oil pipe close to and the heat insulating layer of the one side of inner lining pipe close to, the utility model discloses through setting anticorrosive coating of lower thick upper thin, to the characteristics of the corrosion rate of oil pipe inner lining pipe lower part being greater than the upper part realizes the differentiating precision protection, sets up the transition layer between the lining pipe and steel oil pipe simultaneously, guarantees firm combination between layers and effectively blocks high temperature conduction again, and then cooperates the folding section and fixed steel sleeve pipe of the outer side of steel oil pipe of inner lining pipe both ends cladding and strengthens the fixation, significantly enhances the end sealing property and anti -drop ability.

Description

Technical Field

[0001] This utility model relates to the field of ultra-high molecular weight polyethylene (UHMWPE) oil pipe liner technology, specifically an UHMWPE oil pipe liner with anti-corrosion function. Background Technology

[0002] Ultra-high molecular weight polyethylene (UHMWPE) is widely used in oil pipe liners due to its corrosion resistance, high temperature resistance, and wear resistance. In existing technologies, oil pipe liners are subject to strong corrosion, leading to accelerated damage. During normal oil transportation, the lower side of the liner is always in contact with the oil phase, while the upper side is not; it may sometimes be in contact with the oil phase and sometimes not. Over time, this results in a significantly lower corrosion rate on the upper liner compared to the lower liner.

[0003] Based on this, we now provide an ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function, which can eliminate the drawbacks of existing devices. Utility Model Content

[0004] The purpose of this invention is to provide an ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A corrosion-resistant ultra-high molecular weight polyethylene (UHMWPE) oil pipe liner includes an inner liner disposed inside a steel oil pipe. The inner liner is made of UHMWPE and has an anti-corrosion coating on its inner side. The thickness of the anti-corrosion coating at the lower part of the inner liner is greater than that at the upper part of the inner liner. A transition layer is provided between the inner liner and the steel oil pipe. The transition layer includes an adhesive layer on the side closer to the steel oil pipe and a heat insulation layer on the side closer to the inner liner.

[0006] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the inner liner tube has folded sections at both ends, the folded sections cover the outside of the steel oil pipe, and a fixed steel sleeve is provided on the outside of the folded sections.

[0007] In one alternative: the inner liner tube has a first raised ring on the side near the anti-corrosion coating.

[0008] In one alternative: the anti-corrosion coating is a nano-aluminum spray coating.

[0009] In one alternative: the adhesive layer is an epoxy resin adhesive layer, and the thermal insulation layer is an aerogel nano-insulation felt.

[0010] In one alternative: a plurality of second convex rings are axially distributed on the inner side of the steel oil pipe, and a plurality of third convex rings are axially distributed on the side of the inner liner pipe near the steel oil pipe.

[0011] In one alternative: the second and third convex rings are arranged alternately.

[0012] In one alternative: the inner liner tube is provided with an annular groove on the side near the anti-corrosion coating, and the anti-corrosion coating is provided with a fourth convex ring that matches the annular groove on the side near the inner liner tube.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides differentiated and precise protection by setting a thicker anti-corrosion coating on the inner side of the liner tube, which addresses the characteristic that the corrosion rate of the lower part of the liner tube is greater than that of the upper part. At the same time, a transition layer composed of an epoxy resin adhesive layer and an aerogel nano-insulation felt is set between the liner tube and the steel oil pipe, which not only ensures a firm bond between the layers but also effectively blocks high temperature conduction. In addition, the folded sections covering the outer side of the steel oil pipe at both ends of the liner tube and the fixed steel sleeves strengthen the fixation, which significantly enhances the end sealing and anti-detachment ability.

[0014] 2. This utility model creates a mechanical interlocking effect by setting interlocking convex rings and grooves between multiple interfaces, thereby significantly improving the interlayer bonding strength and shear resistance. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0016] Figure 2 This is a schematic diagram of the inner liner tube in Example 1.

[0017] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0018] Figure reference numerals: 100, steel oil pipe; 101, fixed steel sleeve; 102, second convex ring; 200, inner liner; 201, folded section; 202, first convex ring; 203, third convex ring; 204, annular groove; 300, anti-corrosion coating; 301, fourth convex ring; 400, transition layer; 401, adhesive layer; 402, heat insulation layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Example 1

[0020] In one embodiment, such as Figure 1 and Figure 2 As shown, a corrosion-resistant ultra-high molecular weight polyethylene (UHMWPE) oil pipe liner includes an inner liner 200 disposed inside a steel oil pipe 100. The inner liner 200 is made of UHMWPE, and an anti-corrosion coating 300 is provided on the inner side of the inner liner 200. The thickness of the anti-corrosion coating 300 at the lower part of the inner liner 200 is greater than that at the upper part. This differential protection is achieved by using a thicker lower part and thinner upper part of the anti-corrosion coating 300 to address the characteristic that the corrosion rate at the lower part of the inner liner 200 is greater than that at the upper part. A transition layer 400 is provided between the inner liner 200 and the steel oil pipe 100. The transition layer 400 includes an adhesive layer 401 near the steel oil pipe 100 and a layer 400 near the inner liner 200. The heat insulation layer 402 on the 00 side, through the transition layer 400 composed of the adhesive layer 401 and the heat insulation layer 402, not only ensures a firm bond between the inner liner tube 200 and the steel oil pipe 100, but also effectively blocks high temperature conduction. The inner liner tube 200 has folded sections 201 at both ends, which cover the outside of the steel oil pipe 100. A fixed steel sleeve 101 is provided on the outside of the folded section 201 to ensure end sealing and anti-detachment capability. The inner liner tube 200 has a first convex ring 202 on the side near the anti-corrosion coating 300. The anti-corrosion coating 300 is a nano-aluminum spray coating, the adhesive layer 401 is an epoxy resin adhesive layer, and the heat insulation layer 402 is an aerogel nano-insulation felt.

[0021] The above embodiments disclose an ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function. By setting an anti-corrosion coating 300 with a thicker bottom and a thinner top on the inner side of the liner 200, differentiated and precise protection is achieved for the characteristic that the corrosion rate of the lower part of the liner 200 is greater than that of the upper part. At the same time, a transition layer 400 composed of an adhesive layer 401 and a heat insulation layer 402 is set between the liner 200 and the steel oil pipe 100, which not only ensures a firm bond between the layers but also effectively blocks high temperature conduction. In addition, the folded sections 201 covering the outer side of the steel oil pipe at both ends of the liner 200 and the fixed steel sleeve 101 strengthen the fixation, which significantly enhances the end sealing and anti-detachment ability. Example 2

[0022] The difference from Example 1 is that, as Figure 3 As shown, a number of second convex rings 102 are axially distributed on the inner side of the steel oil pipe 100, and a number of third convex rings 203 are axially distributed on the side of the inner liner tube 200 near the steel oil pipe 100. The second convex rings 102 and the third convex rings 203 are staggered. The inner liner tube 200 is provided with an annular groove 204 on the side near the anti-corrosion coating 300, and the anti-corrosion coating 300 is provided with a fourth convex ring 301 that matches the annular groove 204 on the side near the inner liner tube 200. By setting the interlocking convex ring and groove structure between the multi-layer interfaces, a mechanical interlocking effect is formed, which achieves the effect of greatly improving the interlayer bonding strength and shear resistance.

[0023] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A corrosion-resistant ultra-high molecular weight polyethylene (UHMWPE) oil pipe liner, comprising an inner liner (200) disposed inside a steel oil pipe (100), wherein the inner liner (200) is made of UHMWPE, characterized in that, The inner side of the liner (200) is provided with an anti-corrosion coating (300). The thickness of the anti-corrosion coating (300) at the lower part of the liner (200) is greater than that at the upper part of the liner (200). A transition layer (400) is provided between the liner (200) and the steel oil pipe (100). The transition layer (400) includes an adhesive layer (401) near the steel oil pipe (100) and a heat insulation layer (402) near the liner (200).

2. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 1, characterized in that, The inner liner tube (200) has folded sections (201) at both ends. The folded sections (201) cover the outside of the steel oil pipe (100). A fixed steel sleeve (101) is provided on the outside of the folded sections (201).

3. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 2, characterized in that, The inner liner (200) has a first protruding ring (202) on the side near the anti-corrosion coating (300).

4. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 1, characterized in that, The anti-corrosion coating (300) is a nano-aluminum spray coating.

5. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 1, characterized in that, The adhesive layer (401) is an epoxy resin adhesive layer, and the heat insulation layer (402) is an aerogel nano-insulation felt.

6. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 1, characterized in that, The steel oil pipe (100) has a plurality of second convex rings (102) axially distributed on the inner side, and the inner liner (200) has a plurality of third convex rings (203) axially distributed on the side of the steel oil pipe (100).

7. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 6, characterized in that, The second convex ring (102) and the third convex ring (203) are arranged alternately.

8. The ultra-high molecular weight polyethylene oil pipe liner with anti-corrosion function according to claim 6, characterized in that, The inner liner tube (200) has an annular groove (204) on the side near the anti-corrosion coating (300), and the anti-corrosion coating (300) has a fourth convex ring (301) that matches the annular groove (204) on the side near the inner liner tube (200).

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