Corrosion-resistant seamless steel pipe for petroleum transportation

Abstract

The utility model relates to the technical field of petroleum delivery seamless pipes, and discloses a corrosion-resistant petroleum delivery seamless steel pipe which comprises a seamless pipe body, the rear end of the seamless pipe body is fixedly connected with a first butt joint ring, and the outer wall of the rear end of the first butt joint ring is in threaded connection with a plurality of fixing bolts. The outer wall of the fixing bolt is connected with a second butt joint ring through an assembling assembly, the outermost layer of the seamless pipe body is fixedly connected with an austenite steel layer, the inner wall of the austenite steel layer is fixedly connected with a conical supporting net, and the outer wall of the conical supporting net is fixedly connected with a polyurethane foam layer. The bottom end of the conical supporting net is connected with a carbon structural steel layer through an anti-corrosion assembly. According to the utility model, the connection leakproofness between the pipelines is improved, the connection leakproofness is improved, the possibility of leakage of petroleum or other liquids is greatly reduced, the damage risk can be reduced by improving the corrosion resistance, and the possibility of leakage is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless pipes for oil transportation, in particular to a corrosion-resistant seamless steel pipe for oil transportation. Background Art

[0002] Oil transportation seamless steel pipe is a kind of pipe specially designed for transporting oil and natural gas. Due to its seamless structure, it has better overall performance and strength than seamed pipes. It is very suitable for high pressure, high temperature or low temperature environment. This kind of pipe is mainly used in oil and gas field mining, transportation and refining projects.

[0003] After searching, a seamless petroleum steel pipe with announcement number CN218818731U includes a first seamless steel pipe, a second seamless steel pipe is arranged on the side of the first seamless steel pipe, the first seamless steel pipe and the second seamless steel pipe are connected by a sealing connection component, and the first seamless steel pipe is also provided with a reinforcing fixing component. The utility model provides a sealing connection component between the first seamless steel pipe and the second seamless steel pipe, and the sealing connection component can make the connection between the first seamless steel pipe and the second seamless steel pipe more sealed, and will not be affected by the external thermal expansion and contraction force to affect the sealing of the connection, avoiding the gap problem caused by the flange connection, making the transportation of oil smoother when flowing through the first seamless steel pipe and the second seamless steel pipe, avoiding the loss caused by leakage of transported oil, and being more conducive to user use.

[0004] Based on the above patent, a sealing connection assembly is provided between the first seamless steel pipe and the second seamless steel pipe. The sealing connection assembly can make the connection between the first seamless steel pipe and the second seamless steel pipe more sealed, and will not be affected by the external thermal expansion and contraction force and affect the sealing of the connection, thereby avoiding the gap problem caused by the flange connection, making the oil flow through the first seamless steel pipe and the second seamless steel pipe smoother, avoiding the loss caused by oil leakage during transportation, and being more conducive to user use. However, when the device is docked, the abutment block is fixed to the seamless steel pipe, and the abutment block will slip when the seamless steel pipe is heated, which reduces the fixation of the abutment block to the seamless steel pipe, affecting the normal use of the seamless steel pipe. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a corrosion-resistant seamless steel pipe for petroleum transportation, which improves the airtightness of the connection between pipelines. Improving the airtightness of the connection greatly reduces the possibility of leakage of oil or other liquids. Improving corrosion resistance can reduce these damage risks and thus reduce the possibility of leakage.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A corrosion-resistant seamless steel pipe for petroleum transportation comprises a seamless pipe body, a first docking ring is fixedly connected to the rear end of the seamless pipe body, a plurality of fixing bolts are threadedly connected to the outer wall of the rear end of the first docking ring, a second docking ring is connected to the outer wall of the fixing bolts through an assembly component, an austenitic steel layer is fixedly connected to the outermost layer of the seamless pipe body, a conical support net is fixedly connected to the inner wall of the austenitic steel layer, a polyurethane foam layer is fixedly connected to the outer wall of the conical support net, a carbon structural steel layer is connected to the bottom end of the conical support net through an anti-corrosion component, a prism support net is fixedly connected to the inner wall of the carbon structural steel layer, and an epoxy resin layer is fixedly connected to the outer wall of the prism support net.

[0008] Furthermore, the assembly component includes a plurality of rubber pads fixedly connected to the inner wall of the first docking ring, the rear end of the first docking ring is rotatably connected to an adjustment ring, the inner wall of the adjustment ring is connected to a plurality of threaded rods through a bevel gear group, and the outer walls of the threaded rods are all threadedly connected to extrusion blocks.

[0009] Furthermore, the anti-corrosion component includes a nickel-molybdenum alloy layer fixedly connected to the bottom end of the epoxy resin layer, the inner wall of the nickel-molybdenum alloy layer is fixedly connected to a straight plate support net, the outer wall of the straight plate support net is fixedly connected to a petroleum-based tar layer, and the outer wall of the bottom end of the straight plate support net is fixedly connected to a martensitic steel layer.

[0010] Furthermore, the outer wall of the polyurethane foam layer is fixedly connected to the inner wall of the austenitic steel layer.

[0011] Furthermore, the helical gear set includes a helical gear ring fixedly connected to the inner wall of the adjustment ring and a helical gear fixedly connected to the outer wall of the threaded rod, and the helical gear ring and the helical gear are meshingly connected.

[0012] Furthermore, the opposite end of the threaded rod is rotatably connected to the inner wall of the first docking ring.

[0013] Furthermore, the rear end of the extrusion block is slidably connected to the inner wall of the front end of the first docking ring.

[0014] Furthermore, the outer wall of the martensitic steel layer is fixedly connected to the inner wall of the nickel-molybdenum alloy layer.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, by using a rubber pad, an adjusting ring, a bevel gear ring, a bevel gear, a threaded rod and an extrusion block in combination, the tightness of the connection between pipelines is improved, the possibility of leakage of oil or other liquids is greatly reduced, environmental pollution and possible safety risks are reduced, the transportation efficiency and economy are ensured, and the service life of the pipeline is extended.

[0017] 2. In the utility model, by using austenitic steel layer, conical support net, polyurethane foam layer, carbon structural steel layer, nickel-molybdenum alloy layer, straight plate support net, petroleum-based tar layer and martensitic steel layer in combination, each structure improves the corrosion resistance of the device. Improving corrosion resistance can reduce these damage risks, thereby reducing the possibility of leakage, protecting the environment, avoiding economic losses, and effectively preventing corrosive substances from damaging pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a corrosion-resistant seamless steel pipe for oil transportation proposed by the utility model;

[0019] Figure 2 This is a half-section view of the first butt joint ring of a corrosion-resistant seamless steel pipe for oil transportation proposed by the utility model;

[0020] Figure 3 A half-section diagram of a conical support net for a corrosion-resistant seamless steel pipe for oil transportation proposed by the utility model;

[0021] Figure 4 A half-section view of the second butt joint ring of a corrosion-resistant seamless steel pipe for oil transportation proposed by the utility model;

[0022] Figure 5 This is a half-section view of an adjustment ring of a corrosion-resistant seamless steel pipe for petroleum transportation proposed by the utility model.

[0023] Legend:

[0024] 1. Seamless pipe body; 2. First docking ring; 3. Second docking ring; 4. Fixing bolts; 5. Austenitic steel layer; 6. Conical support net; 7. Polyurethane foam layer; 8. Carbon structural steel layer; 9. Prismatic tube support net; 10. Epoxy resin layer; 11. Rubber pad; 12. Adjusting ring; 13. Bevel gear ring; 14. Bevel gear; 15. Threaded rod; 16. Extrusion block; 17. Nickel-molybdenum alloy layer; 18. Straight plate support net; 19. Petroleum-based tar layer; 20. Martensitic steel layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1-5The utility model provides an embodiment: a corrosion-resistant seamless steel pipe for petroleum transportation, comprising a seamless pipe body 1, a first docking ring 2 is fixedly connected to the rear end of the seamless pipe body 1, a plurality of fixing bolts 4 are threadedly connected to the outer wall of the rear end of the first docking ring 2, and a second docking ring 3 is connected to the outer wall of the fixing bolt 4 through an assembly component, an austenitic steel layer 5 is fixedly connected to the outermost layer of the seamless pipe body 1, a conical support net 6 is fixedly connected to the inner wall of the austenitic steel layer 5, a polyurethane foam layer 7 is fixedly connected to the outer wall of the conical support net 6, a carbon structural steel layer 8 is connected to the bottom end of the conical support net 6 through an anti-corrosion component, a prism support net 9 is fixedly connected to the inner wall of the carbon structural steel layer 8, an epoxy resin layer 10 is fixedly connected to the outer wall of the prism support net 9, and the outer wall of the polyurethane foam layer 7 is fixedly connected to the inner wall of the austenitic steel layer 5. When docking, the first docking ring 2 is fitted with the second docking ring 3, so that the rubber pad 11 seals the second docking ring 3, and then the fixing bolt 4 is rotated to preliminarily assemble the first docking ring 2 and the second docking ring 3.

[0027] Specifically, a plurality of rubber pads 11 are fixedly connected to the inner wall of the first docking ring 2, an adjusting ring 12 is rotatably connected to the rear end of the first docking ring 2, a plurality of threaded rods 15 are connected to the inner wall of the adjusting ring 12 through a helical gear group, and an extrusion block 16 is threadedly connected to the outer wall of the threaded rod 15, a helical gear ring 13 is fixedly connected to the inner wall of the adjusting ring 12, and a helical gear 14 is fixedly connected to the outer wall of the threaded rod 15, and the helical gear ring 13 and the helical gear 14 are meshedly connected, the opposite end of the threaded rod 15 is rotatably connected to the inner wall of the first docking ring 2, and the rear end of the extrusion block 16 is slidably connected to the first The inner wall of the front end of the docking ring 2 rotates the adjusting ring 12, so that the adjusting ring 12 rotates with the bevel gear 14 through the bevel gear ring 13, so that the bevel gear 14 drives the threaded rod 15 to rotate, and the threaded rod 15 drives the extrusion block 16 to rotate relatively, so that the extrusion block 16 is stuck at the second docking ring 3, thereby increasing the airtightness between the first docking ring 2 and the second docking ring 3, improving the connection airtightness, greatly reducing the possibility of oil or other liquid leakage, reducing environmental pollution and possible safety risks, and ensuring the transportation efficiency and economy, and helping to extend the service life of the pipeline.

[0028] Specifically, the bottom end of the epoxy resin layer 10 is fixedly connected to a nickel-molybdenum alloy layer 17, the inner wall of the nickel-molybdenum alloy layer 17 is fixedly connected to a straight plate support net 18, the outer wall of the straight plate support net 18 is fixedly connected to a petroleum-based tar layer 19, the outer wall of the bottom end of the straight plate support net 18 is fixedly connected to a martensitic steel layer 20, and the outer wall of the martensitic steel layer 20 is fixedly connected to the inner wall of the nickel-molybdenum alloy layer 17. The austenitic steel layer 5 has good high temperature resistance, good corrosion resistance and mechanical properties, and the conical support net 6 can buffer the external force, and the polyurethane foam layer 7 achieves insulation and anti-corrosion effects. The carbon structural steel layer 8 has good structural Structural stability, maintaining the structural connection of the seamless pipe body 1 stable, while the epoxy resin layer 10 buffers the external pressure and the internal pressure of the oil, improving the firmness of the device, and the epoxy resin layer 10 has chemical stability and corrosion resistance, enhancing the corrosion resistance of the pipeline, while the nickel-molybdenum alloy layer 17 and the petroleum-based tar layer 19 buffer the internal pressure of the oil, and the martensitic steel layer 20 can prevent the corrosion of the oil to the pipeline, so that each structure improves the corrosion resistance of the device. Improving corrosion resistance can reduce these damage risks, thereby reducing the possibility of leakage, protecting the environment, avoiding economic losses, and effectively preventing corrosive substances from damaging the pipeline.

[0029] Working principle: during docking, fit the first docking ring 2 and the second docking ring 3 together, so that the rubber pad 11 seals the second docking ring 3, and then rotate the fixing bolt 4 to preliminarily assemble the first docking ring 2 and the second docking ring 3, and rotate the adjusting ring 12 to make the adjusting ring 12 rotate with the bevel gear ring 13 and the bevel gear 14, so that the bevel gear 14 drives the threaded rod 15 to rotate, and the threaded rod 15 drives the extrusion block 16 to rotate relatively, so that the extrusion block 16 is stuck at the second docking ring 3, thereby increasing the airtightness between the first docking ring 2 and the second docking ring 3, improving the connection airtightness, greatly reducing the possibility of oil or other liquid leakage, reducing environmental pollution and possible safety risks, and ensuring the transportation efficiency and economy, and helping to extend the service life of the pipeline, and the austenitic steel layer 5 has good high temperature resistance and good The corrosion resistance and mechanical properties of the device are good, and the conical support net 6 can buffer the external force, and the polyurethane foam layer 7 achieves insulation and corrosion resistance. The carbon structural steel layer 8 has good structural stability, maintaining the structural connection of the seamless pipe body 1 stable, and the epoxy resin layer 10 buffers the external pressure and the internal pressure of the oil, improving the firmness of the device, and the epoxy resin layer 10 has chemical stability and corrosion resistance, and strengthens the corrosion resistance of the pipeline, while the nickel-molybdenum alloy layer 17 and the petroleum-based tar layer 19 buffer the internal pressure of the oil, and the martensitic steel layer 20 can prevent the corrosion of the oil to the pipeline, so that each structure improves the corrosion resistance of the device. Improving corrosion resistance can reduce these damage risks, thereby reducing the possibility of leakage, protecting the environment, avoiding economic losses, and effectively preventing corrosive substances from damaging the pipeline and extending the service life of the pipeline.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A corrosion-resistant seamless steel pipe for petroleum transportation, comprising a seamless pipe body (1), characterized in that: The rear end of the seamless pipe body (1) is fixedly connected to a first docking ring (2), the outer wall of the rear end of the first docking ring (2) is threadedly connected to a plurality of fixing bolts (4), the outer wall of the fixing bolts (4) is connected to a second docking ring (3) through an assembly component, the outermost layer of the seamless pipe body (1) is fixedly connected to an austenitic steel layer (5), the inner wall of the austenitic steel layer (5) is fixedly connected to a conical support net (6), the outer wall of the conical support net (6) is fixedly connected to a polyurethane foam layer (7), the bottom end of the conical support net (6) is connected to a carbon structural steel layer (8) through an anti-corrosion component, the inner wall of the carbon structural steel layer (8) is fixedly connected to a prism support net (9), and the outer wall of the prism support net (9) is fixedly connected to an epoxy resin layer (10).

2. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 1, characterized in that: The assembly component comprises a plurality of rubber pads (11) fixedly connected to the inner wall of a first docking ring (2); an adjustment ring (12) is rotatably connected to the rear end of the first docking ring (2); the inner wall of the adjustment ring (12) is connected to a plurality of threaded rods (15) via a helical gear set; and the outer walls of the threaded rods (15) are all threadedly connected to extrusion blocks (16).

3. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 1, characterized in that: The anti-corrosion component comprises a nickel-molybdenum alloy layer (17) fixedly connected to the bottom end of the epoxy resin layer (10), the inner wall of the nickel-molybdenum alloy layer (17) is fixedly connected to a straight plate support net (18), the outer wall of the straight plate support net (18) is fixedly connected to a petroleum-based tar layer (19), and the outer wall of the bottom end of the straight plate support net (18) is fixedly connected to a martensitic steel layer (20).

4. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 1, characterized in that: The outer wall of the polyurethane foam layer (7) is fixedly connected to the inner wall of the austenitic steel layer (5).

5. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 2, characterized in that: The helical gear set comprises a helical gear ring (13) fixedly connected to the inner wall of the adjustment ring (12) and a helical gear (14) fixedly connected to the outer wall of the threaded rod (15), and the helical gear ring (13) and the helical gear (14) are meshingly connected.

6. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 2, characterized in that: The threaded rod (15) is rotatably connected at one end opposite to the other end to the inner wall of the first docking ring (2).

7. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 2, characterized in that: The rear end of the extrusion block (16) is slidably connected to the inner wall of the front end of the first docking ring (2).

8. The corrosion-resistant seamless steel pipe for petroleum transportation according to claim 3, characterized in that: The outer wall of the martensitic steel layer (20) is fixedly connected to the inner wall of the nickel-molybdenum alloy layer (17).

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