A protection structure for a subsea oil and gas pipeline

Abstract

The utility model belongs to submarine pipeline technical field especially relates to a submarine oil and gas transmission pipeline protection structure, including pipeline body, the pipeline body outer end is wound and is wrapped with elastic buffer layer, is provided with two rigid protective shell of half setting of elastic buffer layer outer end, the rigid protective shell outer end is connected with the anti -collision inclined plate. Device through elastic buffer layer, rigid protective shell, anti -collision inclined plate etc. Multilayer protection design, from the buffer impact, resistance external force destruction to change water flow direction etc. Many aspects to pipeline body protection, has improved the protection ability of pipeline in complex marine environment greatly, has reduced the risk of pipeline damage, has utilized the fixed anchor rod and has anchored the protection structure in the seabed, the support leg frame has strengthened the stability of protection structure in the seabed, the sealing structure has guaranteed the sealing of protection structure inside, such design makes the whole protection structure can long -term stably protect the pipeline, guarantees the safe operation of pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of submarine pipeline technology, and in particular relates to a protective structure for submarine oil and gas transmission pipelines. Background Technology

[0002] With the large-scale development of marine oil and gas resources, the safety and stability of subsea oil and gas pipelines, as key facilities connecting offshore oil and gas fields with onshore terminals, are of paramount importance.

[0003] However, due to the extreme complexity of the seabed environment, oil and gas pipelines face numerous severe challenges. For example, ocean currents carry large amounts of particulate matter such as silt, which continuously and directly impact the pipelines. Prolonged scouring not only causes wear on the pipeline surface, thinning the pipeline wall and reducing its pressure-bearing capacity, but may also damage the pipeline's anti-corrosion coating, accelerating the corrosion process. Especially in areas with strong ocean currents, the scouring force on the pipeline is even greater, significantly increasing the risk of pipeline leaks. Moreover, the problem of marine organism attachment cannot be ignored. The ocean contains a wide variety of organisms, such as shellfish, algae, and microorganisms, which can easily attach and grow on the pipeline surface. A large amount of biological attachment not only increases the weight of the pipeline and puts greater pressure on the pipeline's supporting structure, but more seriously, biological attachment can create a localized corrosive environment. The metabolic activities of microorganisms can trigger complex electrochemical corrosion reactions, accelerating pipeline corrosion and perforation, and significantly shortening the pipeline's service life.

[0004] In view of this, we propose a protective structure for subsea oil and gas pipelines. Utility Model Content

[0005] The purpose of this invention is to provide a protective structure for subsea oil and gas pipelines to solve the problems mentioned in the background art.

[0006] In view of this, the present invention provides a protective structure for a subsea oil and gas pipeline, including a pipeline body, an elastic buffer layer wrapped around the outer end of the pipeline body, two rigid protective shells arranged in a symmetrical manner at the outer end of the elastic buffer layer, anti-impact inclined plates connected to the outer ends of the rigid protective shells, a fixing plate at the upper end of the rigid protective shells, fixing anchor bolts on both sides of the fixing plate, and a swing rope on the outer surface of the anti-impact inclined plate.

[0007] In this technical solution, the elastic buffer layer can effectively buffer the impact force of the external environment on the pipeline body and reduce the damage caused by collision, water flow impact, etc. The rigid protective shell is used to provide direct physical protection for the pipeline body. The anti-scouring inclined plate is used to prevent the ocean current from scouring the pipeline body. The fixed plate and the fixed anchor rod work together to not only connect the two rigid protective shells together, but also firmly anchor the device to the seabed to prevent it from moving under the action of external forces such as water flow. The swing rope swings continuously under the action of ocean current to drive away marine organisms that approach the pipeline and inhibit marine organisms from attaching to the pipeline.

[0008] In the above technical solution, the elastic buffer layer is made of corrosion-resistant elastic rubber material, and the elastic buffer layer is spirally wrapped around the outer end of the pipe body like a bandage.

[0009] In this technical solution, the spiral winding method not only ensures that the elastic buffer layer fits tightly with the pipe body, but also disperses the impact force to a certain extent. At the same time, the corrosion resistance can prevent seawater from eroding the elastic buffer layer and extend its service life.

[0010] In the above technical solution, the rigid protective shell and the anti-impact inclined plate are made of high-strength, corrosion-resistant alloy material. The rigid protective shell is closely attached to the outer end of the elastic buffer layer, and the inner wall of the rigid protective shell is provided with anti-slip grooves.

[0011] In this technical solution, the high-strength alloy material gives the rigid protective shell good resistance to pressure and deformation, protecting the pipeline body from damage by large external forces. The anti-slip groove design increases the friction between the rigid protective shell and the elastic buffer layer, making the two more stable and less prone to relative sliding. The anti-impact inclined plate is set at the outer end of the rigid protective shell, which can change the direction of water flow, reduce the direct impact of water flow on the pipeline, and reduce the risk of pipeline erosion.

[0012] In the above technical solution, the lower end of the rigid protective shell is connected to a support leg frame, and the anti-impact inclined plate is inclined and perpendicular to the cross-sectional normal of the rigid protective shell.

[0013] In this technical solution, the support legs can provide additional support for the rigid protective shell, making it more stable on the seabed and preventing seabed rocks from damaging the pipeline body.

[0014] In the above technical solution, a sealing frame is further connected to the outer ends of the two sides of one rigid protective shell, and a sealing rod is connected to the side ends of the two sides of the other rigid protective shell, with the sealing rod located inside the sealing frame.

[0015] In this technical solution, the sealing frame and the sealing rod together form a sealing structure, which can prevent external substances such as seawater from entering the rigid protective shell, avoid damage to the elastic buffer layer and the pipe body, and enhance the sealing and integrity of the protective structure.

[0016] In the above technical solution, the fixing plate is arc-shaped with a bending protrusion in the middle. The sealing frame matches the bending protrusion. The anti-impact inclined plate is connected to a support pipe. The two ends of the fixing plate are located on the support pipe, and the two ends of the fixing plate are provided with round holes that communicate with the support pipe. The fixing anchor passes through the round hole and the support pipe, and the lower end is drilled into the seabed.

[0017] In this technical solution, the arc-shaped fixing plate conforms to the shape of the pipe, better matches the rigid protective shell, and enhances the stability of the overall structure. The fixing anchor is fixed to the seabed through the fixing plate and the support pipe, firmly anchoring the protective structure to the seabed and preventing it from moving under the action of external forces such as water flow.

[0018] In the above technical solution, further, the outer end of the swing rope is connected to multiple paddles, the paddles are lightweight plastic sheets, the outer end of the anti-impact inclined plate is connected to multiple semi-circular rings, and the two ends of the swing rope are tied to the semi-circular rings.

[0019] In this technical solution, the lever, under the action of the ocean current, can drive the swing rope to swing continuously, and the semi-circular ring is used to connect the swing rope.

[0020] The beneficial effects of this utility model are:

[0021] 1. This subsea oil and gas pipeline protection structure employs a multi-layered design, including an elastic buffer layer, a rigid protective shell, and anti-impact inclined plates. This design protects the pipeline from multiple angles, such as buffering impacts, resisting external force damage, and altering water flow direction. This significantly improves the pipeline's protective capabilities in complex marine environments and reduces the risk of damage. Furthermore, fixed anchor bolts anchor the protection structure to the seabed, support legs enhance its stability on the seabed, and a sealing structure ensures internal airtightness. This design allows the entire protection structure to provide long-term, stable protection for the pipeline, ensuring its safe operation.

[0022] 2. The protective structure of this subsea oil and gas pipeline is equipped with a swing rope. Under the action of ocean currents, the swing rope and lightweight plastic levers swing continuously to drive away marine organisms that approach the pipeline, inhibit marine organism attachment, and reduce a series of problems caused by marine organism attachment, such as increasing pipeline weight, affecting heat dissipation, and aggravating local corrosion. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the rigid protective shell structure in this utility model;

[0025] Figure 3 This is a schematic diagram of the elastic buffer layer structure in this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 5 In this utility model Figure 4 Enlarged view of region A.

[0028] The markings in the diagram are as follows:

[0029] 1. Pipe body; 2. Elastic buffer layer; 3. Rigid protective shell; 4. Anti-impact inclined plate; 5. Fixing plate; 6. Fixing anchor; 7. Swing rope; 8. Support leg frame; 9. Sealing frame; 10. Sealing rod; 11. Support pipe; 12. Semicircular ring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0031] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Example 1: This example provides a protective structure for a subsea oil and gas pipeline, including a pipeline body 1. An elastic buffer layer 2 is wrapped around the outer end of the pipeline body 1. Two rigid protective shells 3 are arranged in a symmetrical manner at the outer end of the elastic buffer layer 2. An anti-impact inclined plate 4 is connected to the outer end of the rigid protective shell 3. A fixing plate 5 is provided at the upper end of the rigid protective shell 3. Fixed anchor bolts 6 are provided on both sides of the fixing plate 5. A swing rope 7 is provided on the outer surface of the anti-impact inclined plate 4.

[0033] The system includes an elastic buffer layer 2 that provides buffer protection around the pipeline body 1, two rigid protective shells 3 that are set in half to wrap around the elastic buffer layer 2 to enhance the overall protection strength, an anti-impact inclined plate 4 connected to the outer end of the rigid protective shell 3 to change the direction of the ocean current, a fixed plate 5 and a fixed anchor 6 to fix the protective structure to the seabed, and a swing rope 7 that swings under the action of the ocean current to interfere with the ocean current. Advantages: It forms a multi-layered protection system, from buffering external forces to changing the direction of the ocean current to fixing the structure, to protecting the pipeline in all aspects and improving the safety and stability of the pipeline in the complex environment of the seabed.

[0034] Example 2: This example provides a protective structure for a subsea oil and gas pipeline. In addition to the technical solutions of the above examples, it also has the following technical features: the elastic buffer layer 2 is made of corrosion-resistant elastic rubber material, and the elastic buffer layer 2 is spirally wrapped around the outer end of the pipeline body 1 like a bandage.

[0035] The corrosion-resistant elastic rubber material is evenly distributed on the outside of the pipe body 1 through a spiral winding method. It absorbs external impact force by utilizing the elastic deformation of the material, while resisting marine environmental erosion with its corrosion resistance properties. Advantages: It effectively buffers impact forces from various directions and can maintain stable performance in marine environments for a long time, extending the service life of the pipe and protective structure and improving the durability of the protective effect.

[0036] Example 3: This example provides a protective structure for a subsea oil and gas pipeline. In addition to the technical solutions of the above examples, it also has the following technical features: the rigid protective shell 3 and the anti-impact inclined plate 4 are made of high-strength and corrosion-resistant alloy materials. The rigid protective shell 3 is tightly attached to the outer end of the elastic buffer layer 2, and the inner wall of the rigid protective shell 3 is provided with anti-slip grooves.

[0037] The high-strength, corrosion-resistant alloy material provides strong physical protection and corrosion resistance for the protective shell and inclined plate. The anti-slip grooves on the inner wall increase the friction with the elastic buffer layer 2, ensuring that the rigid protective shell 3 is stably fixed outside the elastic buffer layer 2. Advantages: It enhances the strength and durability of the protective structure, reliably resists external impacts and marine corrosion, and at the same time ensures the stable connection between the protective layers, improving the overall protective performance.

[0038] Example 4: This example provides a protective structure for a subsea oil and gas pipeline. In addition to the technical solutions of the above examples, it also has the following technical features: the lower end of the rigid protective shell 3 is connected to a support leg 8, and the anti-impact inclined plate 4 is inclined and perpendicular to the cross-sectional normal of the rigid protective shell 3.

[0039] Among them, the support leg 8 provides additional support for the rigid protective shell 3, enhancing its stability on the seabed; the inclined anti-surge plate 4 works in conjunction with the rigid protective shell 3 to change the direction of the ocean current and reduce the direct scouring of the pipeline by the ocean current; advantages: further stabilizes the protective structure, effectively reduces the damage to the pipeline caused by ocean current scouring, and improves the reliability of the protective structure in the ocean current environment.

[0040] Example 5: This example provides a protective structure for a subsea oil and gas pipeline. In addition to the technical solutions of the above examples, it also has the following technical features: a rigid protective shell 3 has a sealing frame 9 connected to the outer ends of its two sides, and a sealing rod 10 is connected to the side ends of the two sides of another rigid protective shell 3. The sealing rod 10 is located inside the sealing frame 9.

[0041] The sealing frame 9 and the sealing rod 10 work together to form a sealing structure, preventing seawater, silt, and other impurities from entering the rigid protective shell 3 and protecting the elastic buffer layer 2 and the pipe body 1. Advantages: Ensures a stable internal environment for the protective structure, prevents impurities from damaging the internal structure, and extends the service life of the protective structure and the pipe.

[0042] Example 6: This example provides a protective structure for a subsea oil and gas pipeline. In addition to the technical solutions of the above examples, it also has the following technical features: the fixing plate 5 is arc-shaped with a bending protrusion in the middle, the sealing frame 9 matches the bending protrusion, the anti-impact inclined plate 4 is connected to the support pipe 11, the two ends of the fixing plate 5 are located on the support pipe 11, and the two ends of the fixing plate 5 are provided with round holes communicating with the support pipe 11. The fixing anchor 6 passes through the round hole and the support pipe 11, and the lower end is drilled into the seabed.

[0043] The fixed anchor rod 6 has a rotating head at the upper end and a threaded groove at the lower end; the arc-shaped fixing plate 5 matches the sealing frame 9 to enhance the connection stability of the rigid protective shell 3; the support pipe 11 provides support for the fixing plate 5; the fixed anchor rod 6 is drilled into the seabed through the rotating head; the threaded groove increases the friction with the seabed, so as to achieve a tight fixation between the protective structure and the seabed; Advantages: It ensures the overall stability and firmness of the protective structure, making it less prone to displacement or loosening under various external forces, and reliably protects the pipeline.

[0044] Example 7: This example provides a protective structure for a subsea oil and gas pipeline. In addition to the technical solutions of the above examples, it also has the following technical features: the outer end of the swing rope 7 is connected to multiple paddles, which are lightweight plastic sheets; the outer end of the anti-impact inclined plate 4 is connected to multiple semi-circular rings 12; and the two ends of the swing rope 7 are tied to the semi-circular rings 12.

[0045] Under the influence of ocean currents, the swinging rope 7 and the lightweight plastic paddle swing to drive away marine life that approaches the pipe; advantages: inhibits the attachment of marine life.

[0046] Working principle: The elastic buffer layer 2 is used to buffer the impact forces such as collisions from the outside world and protect the pipeline body 1. The rigid protective shell 3 is outside the elastic buffer layer 2. With its high strength, it can resist large external force damage and is tightly connected to the elastic buffer layer 2 through the anti-slip groove on the inner wall. The anti-impact inclined plate 4 is inclined at the outer end of the rigid protective shell 3 to change the direction of water flow and reduce the direct impact of water flow on the pipeline. The support leg frame 8 provides support for the rigid protective shell 3, making it more stable on the seabed. The sealing structure composed of the sealing frame 9 and the sealing rod 10 prevents seawater and other external substances from entering the interior of the protective structure. The fixing plate 5 is fixed to the seabed by the fixing anchor 6 to ensure that the entire protective structure will not be displaced by external forces such as water flow. Under the action of ocean currents, the swing rope 7 and the lever swing continuously to drive away the approaching marine organisms and inhibit biological attachment, ensuring the safe operation of the subsea oil and gas pipeline in all aspects.

[0047] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A protective structure for a subsea oil and gas pipeline, comprising a pipeline body (1), characterized in that: The outer end of the pipe body (1) is wrapped with an elastic buffer layer (2). The outer end of the elastic buffer layer (2) is provided with two rigid protective shells (3) arranged in half. The outer end of the rigid protective shell (3) is connected with an anti-impact inclined plate (4). The upper end of the rigid protective shell (3) is provided with a fixing plate (5). The fixing plate (5) is provided with fixing anchors (6) on both sides. The outer surface of the anti-impact inclined plate (4) is provided with a swing rope (7).

2. The protective structure for a subsea oil and gas pipeline according to claim 1, characterized in that, The elastic buffer layer (2) is made of corrosion-resistant elastic rubber material, and the elastic buffer layer (2) is wrapped around the outer end of the pipe body (1) like a bandage.

3. The protective structure for a subsea oil and gas pipeline according to claim 1, characterized in that, The rigid protective shell (3) and the anti-impact inclined plate (4) are made of high-strength, corrosion-resistant alloy material. The rigid protective shell (3) is closely attached to the outer end of the elastic buffer layer (2), and the inner wall of the rigid protective shell (3) is provided with anti-slip grooves.

4. The protective structure for a subsea oil and gas pipeline according to claim 1, characterized in that, The lower end of the rigid protective shell (3) is connected to a support leg (8), and the anti-impact inclined plate (4) is inclined and perpendicular to the cross-sectional normal of the rigid protective shell (3).

5. The protective structure for a subsea oil and gas pipeline according to claim 1, characterized in that, A sealing frame (9) is connected to the outer ends of the two sides of a rigid protective shell (3), and a sealing rod (10) is connected to the side ends of the two sides of another rigid protective shell (3). The sealing rod (10) is located inside the sealing frame (9).

6. The protective structure for a subsea oil and gas pipeline according to claim 5, characterized in that, The fixing plate (5) is arc-shaped with a bent protrusion in the middle. The sealing frame (9) matches the bent protrusion. The anti-impact inclined plate (4) is connected to a support pipe (11). The two ends of the fixing plate (5) are located on the support pipe (11). The two ends of the fixing plate (5) are provided with round holes that communicate with the support pipe (11). The fixing anchor (6) passes through the round hole and the support pipe (11) and the lower end is drilled into the seabed.

7. The protective structure for a subsea oil and gas pipeline according to claim 1, characterized in that, The swing rope (7) has multiple paddles connected to its outer end. The paddles are made of lightweight plastic sheets. The anti-impact inclined plate (4) has multiple semi-circular rings (12) connected to its outer end. The two ends of the swing rope (7) are tied to the semi-circular rings (12).

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