Submarine pipeline protection device and installation method thereof

Abstract

The invention provides a submarine pipeline protection device and an installation method of the submarine pipeline protection device, the submarine pipeline protection device comprises a protection main body, the bottom surface of the protection main body is provided with a containing groove used for containing a submarine pipeline, and the height and the width of the containing groove are larger than or equal to the diameter of the submarine pipeline; the fixing pile is arranged on the face, provided with the containing groove, of the protection body. The fixing pile is used for being inserted into the seabed when the protection body covers the submarine pipeline located on the seabed through the containing groove. According to the submarine pipeline protection device, the containing groove is formed in the protection body, and the submarine pipeline is placed in the containing groove, so that the complex construction processes of ditching and pipeline laying on the seabed and stacking protection of multiple gravel layers are avoided, and the submarine pipeline protection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine pipeline protection, and in particular to a submarine pipeline protection device and an installation method of the submarine pipeline protection device. Background Art

[0002] As important natural resources, oil and natural gas are used in all aspects of life. However, due to excessive exploitation of oil and natural gas, the resources on the ground have gradually been exhausted. People have shifted their mining targets to the seabed. During the seabed mining process, the oil and natural gas mined need to be transported to the ground, so the construction of submarine pipelines is of great significance to the realization of offshore oil and gas development.

[0003] Because there are many ships sailing on the sea, ships may cause damage to submarine pipelines when they drop anchor, and there are problems of seawater corrosion and seawater scouring on the seabed, so the protection of submarine pipelines is particularly important. In the prior art, it is usually necessary to first dig a groove corresponding to the diameter of the submarine pipeline on the seabed, put the submarine pipeline into the groove on the seabed, and then use heavy objects such as gravel to cover the top of the submarine pipeline to protect the submarine pipeline. However, this method of seabed grooving is very labor-intensive and material-intensive, and once the groove is opened, it is also very difficult to adjust the direction of the submarine pipeline later. Summary of the invention

[0004] The present invention provides a submarine pipeline protection device, which is used to solve the problem of low efficiency of the submarine pipeline protection method of seabed grooves in the prior art.

[0005] The present invention provides a submarine pipeline protection device, comprising: A protection body, wherein a receiving groove for receiving a submarine pipeline is provided on the bottom surface of the protection body, and the height and width of the receiving groove are greater than or equal to the diameter of the submarine pipeline; A fixing pile, the fixing pile being arranged on a side of the protective body where the receiving groove is provided; Wherein, the fixing pile is used to be inserted into the seabed when the protection body is arranged on the submarine pipeline of the seabed through the receiving tank cover.

[0006] According to a submarine pipeline protection device provided by the present invention, landslides are arranged on both sides of the protection body, and the landslides extend obliquely downward from the center of the top of the protection body to both sides.

[0007] According to a submarine pipeline protection device provided by the present invention, the submarine pipeline protection device comprises a plurality of the protection bodies, and along the length direction of the submarine pipeline, the front and rear sides of the protection bodies are respectively provided with limiting grooves and limiting protrusions, and two adjacent protection bodies are connected by mortise and tenon joints with the limiting grooves and the limiting protrusions.

[0008] According to a submarine pipeline protection device provided by the present invention, the limiting groove and the limiting protrusion are cooperatively connected along the gravity direction, and the limiting groove and the limiting protrusion limit each other along the length direction of the submarine pipeline.

[0009] According to a submarine pipeline protection device provided by the present invention, a friction surface is further provided on the side of the fixing pile.

[0010] According to a submarine pipeline protection device provided by the present invention, the friction surface is a thread provided on the side surface of the fixing pile.

[0011] According to a submarine pipeline protection device provided by the present invention, a plug is provided at one end of the fixing pile away from the protection body, and the diameter of the plug gradually decreases in a direction away from the protection body.

[0012] According to a submarine pipeline protection device provided by the present invention, a lifting lug is provided on the top of the protection body.

[0013] According to a submarine pipeline protection device provided by the present invention, a counterweight block is provided on the top of the protection body.

[0014] The present invention also provides a method for installing a submarine pipeline protection device, comprising: transporting the submarine pipeline protection device as described above to the top of the submarine pipeline; Grab the lifting lug of the submarine pipeline protection device, lower the submarine pipeline protection device onto the submarine pipeline, and accommodate the submarine pipeline through the accommodating tank; Grab the second submarine pipeline protection device as described above, align the limiting groove of the second submarine pipeline protection device as described above with the limiting protrusion of the first submarine pipeline protection device as described above, lower the second submarine pipeline protection device as described above, and make the second submarine pipeline protection device as described above and the first submarine pipeline protection device as described above connected to each other by mortise and tenon joints.

[0015] The present invention provides a submarine pipeline protection device, which provides a storage space for the submarine pipeline by providing a storage groove on the protection body. When the protection body cover is set on the submarine pipeline, the submarine pipeline is placed in the storage groove. Then, the protection body is fixed to the seabed through the fixing device on the protection body, so that the protection body cover is set on the submarine pipeline and will not fall off. In this application, by providing a storage groove on the protection body, the problem of slotting on the seabed is avoided, and the efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the submarine pipeline protection device provided by the present invention.

[0018] Figure 2 It is a structural schematic diagram of the protection body provided by the present invention.

[0019] Figure 3 It is a schematic diagram of assembling two adjacent protection bodies provided by the present invention.

[0020] Figure 4 It is a structural schematic diagram of the fixing pile provided by the present invention.

[0021] Figure 5 It is a schematic diagram of the submarine pipeline protection device provided by the present invention when it is installed on the seabed.

[0022] Figure 6 The figure is a schematic diagram of the installation process of the submarine pipeline protection device provided by the present invention.

[0023] Reference numerals: 1. Protective body; 11. Limiting protrusion; 12. Limiting groove; 13. Accommodating groove; 2. Fixed pile; 21. Friction surface; 22. Plug; 3. Landslide; 4. Lifting lugs; 5. Counterweight; 6. Subsea pipelines; 7. Seabed. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Combine the following Figure 1A submarine pipeline protection device of the present invention is described, comprising a protection body 1 and a fixing pile 2. A receiving groove 13 for receiving a submarine pipeline 6 is provided on the bottom surface of the protection body 1, and the height and width of the receiving groove 13 are greater than or equal to the diameter of the submarine pipeline 6. The fixing pile 2 is provided on a side of the protection body 1 where the receiving groove 13 is provided. The fixing pile 2 is used to be inserted into the seabed 7 when the protection body 1 covers the submarine pipeline 6 located on the seabed 7 through the receiving groove 13.

[0026] Please refer to Figures 1 to 5 , a receiving groove 13 is provided on the bottom surface of the protective body 1, and the bottom surface of the protective body 1 is the side of the protective body 1 facing the submarine pipeline 6. At the same time, a fixing pile 2 is also installed on the bottom surface of the protective body 1, and the fixing pile 2 is detachably connected to the protective body 1. Preferably, a threaded connection is used. In order to make the receiving groove 13 fit the submarine pipeline 6 more closely, the end of the receiving groove 13 away from the submarine pipeline 6 is set to be semicircular. The open end of the receiving groove 13 is rectangular, and the width of the rectangle is greater than or equal to the diameter of the submarine pipeline 6, and the height of the rectangle is greater than or equal to the radius of the submarine pipeline 6. Because the open end of the receiving groove 13 needs to enable the submarine pipeline 6 to smoothly enter the receiving groove 13, the open end of the receiving groove 13 cannot be designed to be semicircular.

[0027] After the submarine pipeline 6 is laid on the seabed 7, the protective body 1 is grasped above the submarine pipeline 6, and the axis of the receiving groove 13 is aligned with the axis of the submarine pipeline 6, and the protective body 1 can be lowered. Because the receiving groove 13 is provided on the protective body 1, and the receiving groove 13 has been aligned with the submarine pipeline 6, the receiving groove 13 gradually covers the submarine pipeline 6 during the process of lowering the protective body 1. In order to prevent the submarine pipeline 6 from shaking in the receiving groove 13, in this embodiment, the height and width of the receiving groove 13 are designed to be equal to the diameter of the submarine pipeline 6, so that the submarine pipeline 6 can just fit into the receiving groove 13.

[0028] At the same time, the submarine pipeline 6 is laid on the seabed 7 and will be affected by the scouring of seawater. Although the protective body 1 is covered on the submarine pipeline 6 and can resist the scouring of seawater, the protective body 1 may be washed away by the seawater and cannot protect the submarine pipeline 6. Therefore, in this embodiment, a fixing pile 2 is also provided at the bottom of the protective body 1. Figure 2 As shown, six fixing piles 2 are taken as an example in this embodiment. Preferably, the six fixing piles 2 are evenly and symmetrically arranged on the bottom surface of the protective body 1. In this embodiment, six fixing piles 2 are selected according to the overall volume of the protective body 1, and in different embodiments, they can be adjusted according to actual conditions.

[0029] When the protection body 1 is lowered, the fixing piles 2 are driven by the protection body 1 to move toward the seabed 7. While the protection body 1 covers the submarine pipeline 6, the fixing piles 2 are also inserted into the seabed 7. The mutual friction between the fixing piles 2 and the seabed 7 and the limiting effect of the seabed 7 on the fixing piles 2 ensure the stability of the protection body 1 when it is covered on the submarine pipeline 6.

[0030] In the present application, on the one hand, the submarine pipeline 6 is placed by opening a receiving groove 13 on the protective body 1, thereby avoiding the work process of grooving on the seabed 7 and improving work efficiency. At the same time, the protective body 1 can change its position as the submarine pipeline 6 moves. It is only necessary to reinsert the protective body 1 into the changed seabed 7 through the fixed pile 2 after the submarine pipeline 6 changes its position. On the other hand, compared with the prior art, the top surface of the submarine pipeline 6 is only pressed by the gravity of the object. In the present application, the stability of the connection is increased by adding a fixed pile 2 on the bottom surface of the protective body 1, so that the protective body 1 is more firmly covered on the submarine pipeline 6, and the connection method of the fixed pile 2 is also very simple and convenient.

[0031] In one embodiment, landslides 3 are provided on both sides of the protection body 1 , and the landslides 3 extend obliquely downward from the center of the top of the protection body 1 to both sides.

[0032] like Figure 1 As shown, the entire protection body 1 is approximately in the shape of an arch bridge. When the protection body 1 is covered on the submarine pipeline 6, a landslide 3 extending to both sides is provided on the top of the protection body 1, and the highest point of the landslide 3 is located at the center of the top of the protection body 1. The landslide 3 extends from the center of the top of the protection body 1 to the bottom of both sides, so that objects on the landslide 3 slide out along the landslide 3 to both sides of the protection body 1.

[0033] Because the submarine pipeline 6 is laid in a location where many ships sail and dock, the anchoring action of the ships when docked may cause damage to the protection body 1, so in this embodiment, a landslide 3 is designed on the top surface of the protection body 1. When the ship drops the anchor, if the anchor happens to fall on the protection body 1, the anchor will slide down from the protection body 1 along the landslide 3, thereby avoiding damage caused by squeezing the protection body 1 after the anchor falls.

[0034] Furthermore, elastic parts or soft materials can be added to the protection body 1 to cushion the damage caused by the falling anchor to the protection body 1. For example, silica gel is provided on the top surface of the protection body 1.

[0035] At the same time, in this embodiment, the protective body 1 is made of foam aluminum. Because foam aluminum has the advantages of light weight and high strength, the protective body 1 made of foam aluminum has sufficient strength to protect the submarine pipeline 6. And foam aluminum is a porous structure, please refer to Figure 1 The holes on the protective body 1 are enlarged for example in the figure. In actual situations, the holes on the protective body 1 are not so large. Because the protective body 1 is made of porous foam aluminum material, the protective body 1 can shrink through the gaps on the protective body 1 when it is compressed, thereby buffering the pressure on the protective body 1 and protecting the protective body 1.

[0036] The protective body 1 is made of foamed aluminum material, which can not only increase the pressure resistance of the protective body 1, but also reduce the pressure of the laying operation ship. Because foamed aluminum has the advantage of light weight, under the same load capacity of the laying operation ship, the laying operation ship can carry more protective bodies 1 made of foamed aluminum material at a time, reducing the number of round trips of the laying operation ship and improving the operation efficiency. And because the laying operation ship needs to put down the protective body 1 from the side of the ship, if the weight of a single protective body 1 is too large, it may also cause the laying operation ship to capsize, so the protective body 1 made of foamed aluminum material can also improve the safety of laying.

[0037] In this embodiment, foam aluminum material is used as an example for illustration, but it is not limited thereto. In different embodiments, the material may be replaced with steel or other materials according to actual conditions.

[0038] In one embodiment, the pipeline protection device includes multiple protection bodies 1. Along the length direction of the underwater pipeline 6, the front and rear sides of the protection body 1 are respectively provided with a limiting groove 11 and a limiting protrusion 12, and two adjacent protection bodies 1 are connected by mortise and tenon joints through the limiting groove 11 and the limiting protrusion 12.

[0039] Please refer to Figures 1 to 3 , along the length direction of the receiving groove 13, the front and rear sides of the protection body 1 are respectively provided with a limiting groove 11 and a limiting protrusion 12. In this embodiment, it is taken as an example that two limiting grooves 11 and two limiting protrusions 12 are respectively provided on one protection body 1. In one embodiment, the limiting groove 11 and the limiting protrusion 12 are matched and connected along the gravity direction, and the limiting groove 11 and the limiting protrusion 12 are mutually limited along the length direction of the seabed pipeline 6.

[0040] like Figure 2 As shown, in this embodiment, the limiting groove 11 is approximately triangular. Along the length direction of the accommodating groove 13, the width of the opening end of the limiting groove 11 is small, and the width of the limiting groove 11 gradually increases along the direction away from the opening end. Correspondingly, the limiting protrusion 12 is also of the same shape. Therefore, the limiting protrusion 12 cannot enter from the opening of the limiting groove 11, and the limiting groove 11 can only be placed above the limiting protrusion 12, and the limiting groove 11 and the limiting protrusion 12 are aligned, so that the limiting protrusion 12 is inserted into the limiting groove 11.

[0041] like Figure 3 As shown, two adjacent protection bodies 1 are arranged in sequence, and the arrangement direction remains consistent. Figure 3 The limiting protrusions 12 of the two protective bodies 1 are arranged to the right, so the protective body 1 on the left is aligned with the limiting groove 11 of the protective body 1 on the right through the limiting protrusion 12, so that the two adjacent protective bodies 1 are connected together through the mortise and tenon connection between the limiting protrusion 12 and the limiting groove 11.

[0042] Because in this embodiment, the limiting groove 11 and the limiting protrusion 12 are connected in a coordinated manner along the gravity direction, and the limiting groove 11 and the limiting protrusion 12 are mutually limited along the length direction of the submarine pipeline 6. The protection body 1 also falls from above the submarine pipeline 6 and covers the submarine pipeline 6 along the gravity direction, so when the protection body 1 falls along the gravity direction to cover the submarine pipeline 6, the limiting groove 11 can be aligned with the limiting protrusion 12 on the previous protection body 1 that has covered the submarine pipeline 6, and the connection between the limiting groove 11 and the limiting protrusion 12 is completed.

[0043] It is understandable that the submarine pipeline 6 needs to transport oil and gas from the deep sea to the land. Because the distance is long, the length of the submarine pipeline 6 is also long. If the protective body 1 is also made to be the same length as the submarine pipeline 6, then the transportation and laying of the entire protective body 1 will be very difficult. In this embodiment, the protective body 1 is made into multiple modular monomers, and the multiple protective bodies 1 are arranged in sequence, connected end to end, and connected to each other through the limit groove 11 and the limit protrusion 12, which solves the problem of difficult laying of the protective body 1 due to its excessive length.

[0044] Furthermore, the protective body 1 is made into a plurality of modular units, so that when the protective body 1 is damaged, the units can be repaired or replaced without replacing the entire unit and causing a waste of resources.

[0045] In one embodiment, a friction surface 21 is further provided on the side of the fixing pile 2. In one embodiment, the friction surface 21 is a thread provided on the side of the fixing pile 2.

[0046] Please refer to Figure 4 , the fixed pile 2 is the fixed part of the whole device, and the connection between the fixed pile 2 and the seabed 7 affects the stability of the whole device. Because the fixed pile 2 is connected to the seabed 7 by inserting into the seabed 7, the fixed pile 2 is limited by the seabed 7 in the direction perpendicular to the gravity, which can ensure the stability of the fixed pile 2. And the limiting ability of the seabed 7 on the fixed pile 2 is affected by the insertion depth of the fixed pile 2, so by adjusting the length of the fixed pile 2, the fixed pile 2 can achieve the expected stability. Preferably, in this embodiment, a threaded connection is used between the fixed pile 2 and the protective body 1 to facilitate the disassembly and maintenance of the fixed pile 2.

[0047] In the direction of gravity, the fixed pile 2 is directly inserted into the seabed 7, and the fixed pile 2 and the seabed 7 are directly limited only by the friction of the wall. The friction between the outer wall of the fixed pile 2 and the seabed 7 is affected by the friction coefficient, the positive pressure and the contact area. The friction coefficient of the seabed 7 cannot be changed. The fixed pile 2 needs to be able to be inserted into the seabed 7 and withstand a certain pressure. Therefore, the fixed pile 2 is generally made of steel to ensure that the fixed pile 2 has sufficient strength and rigidity. After the material selection of the fixed pile 2 is determined, the friction coefficient of the fixed pile 2 cannot be changed. Generally, in order to ensure the limiting effect of the seabed 7 on the fixed pile 2, the fixed pile 2 is vertically inserted into the seabed 7, and the positive pressure between the outer wall of the fixed pile 2 and the seabed 7 will not change.

[0048] Therefore, in this embodiment, after comprehensive consideration, the outer wall surface of the fixed pile 2 is set as the friction surface 21, and the friction force is increased by increasing the contact area between the friction surface 21 and the seabed 7. Because the friction force between the fixed pile 2 and the seabed 7 is increased, it is more difficult to pull the fixed pile 2 out of the seabed 7 after the fixed pile 2 is inserted into the seabed 7, thereby improving the stability of the fixed pile 2 after being inserted into the seabed 7.

[0049] The friction surface 21 can be in various forms, such as granular or other forms. In this embodiment, the friction surface 21 is designed as a threaded type, which can increase the contact area between the fixed pile 2 and the seabed 7. At the same time, the thread is easy to process, making the processing of the fixed pile 2 simpler.

[0050] In one embodiment, a plug 22 is provided at one end of the fixing pile 2 which is away from the protection body 1 , and the diameter of the plug 22 gradually decreases along the direction away from the protection body 1 .

[0051] like Figure 4 As shown, the bottom end of the fixed pile 2 is a plug 22, and the plug 22 is designed to be conical. Because the fixed pile 2 needs to be inserted into the seabed 7, when the fixed pile 2 is inserted into the seabed 7 through the plug 22, the smaller volume of the front section of the plug 22 can first contact the seabed 7, so that the seabed 7 is subjected to greater pressure, thereby drilling a hole in the seabed 7. Then, the contact volume between the plug 22 and the seabed 7 is gradually increased, so that the fixed pile 2 can be inserted.

[0052] In this embodiment, one end of the fixing pile 2 inserted into the seabed 7 is designed as a conical plug 22 , which enables the fixing pile 2 to be inserted into the seabed 7 more conveniently.

[0053] In one embodiment, a lifting lug 4 is provided on the top of the protection body 1. In one embodiment, a counterweight 5 is provided on the top of the protection body 1.

[0054] like Figure 1As shown, in this embodiment, four ears 4 are arranged on one protective body 1 as an example. In this embodiment, four ears 4 are selected according to the overall volume of the protective body 1. Preferably, the four ears 4 are evenly and symmetrically arranged on the top surface of the protective body 1. In different embodiments, it can be adjusted according to actual conditions.

[0055] The lifting lugs 4 are arranged on the top surface of the protective body 1, making it more convenient to grab the protective body 1. In addition, the arrangement of the four lifting lugs 4 can make the force more uniform, ensuring more stability when grabbing the protective body 1. Preferably, in this embodiment, the lifting lugs 4 and the protective body 1 are connected by threads.

[0056] At the same time, a counterweight 5 is also provided at the center of the top of the protective body 1. Because there are landslides 3 on both sides of the top of the protective body 1, in order to avoid the counterweight 5 from affecting the landslide 3, the counterweight 5 is arranged at the center of the top of the protective body 1. Because the protective body 1 is made of foamed aluminum material, the weight of the protective body 1 is relatively small, and the gravity generated is also relatively small. When the protective body 1 falls into the seabed 7, under the influence of the buoyancy in the sea, it is easy to cause the installation of the protective body 1 to be unstable. Therefore, in this embodiment, an additional counterweight 5 is added to the top of the protective body 1. Furthermore, in this embodiment, two counterweights 5 are arranged on the top of the protective body 1 according to the actual gravity conditions. However, it is not limited to this. In different embodiments, the number of counterweights 5 can be adjusted according to the weight of the overall device.

[0057] At the same time, in the process of placing the protective body 1 on the submarine pipeline 6, the fixed piles 2 need to be inserted into the seabed 7. However, the weight of the entire pipeline protection device alone is not enough to insert the fixed piles 2 into the seabed 7, so it is necessary to press the fixed piles 2 into the seabed 7 by external force. Then the counterweight block 5 is arranged on the top of the protective body 1, and it can also serve as a point of force during compression. When the fixed piles 2 are pressed into the seabed 7 using a downward pressing device, the counterweight block 5 on the top of the protective body 1 can be pressed down by the downward pressing device, thereby avoiding crushing injuries to other parts of the protective body 1.

[0058] Another embodiment of the present invention further provides a method for installing a pipeline protection device, comprising: Delivering the pipeline protection device as described above to the top of the pipeline; Grab the lifting lug 4 of the pipeline protection device, lower the pipeline protection device onto the submarine pipeline 6, and accommodate the submarine pipeline 6 through the accommodating groove 13; Grab the second pipe protection device as described above, align the limiting groove 11 of the second pipe protection device as described above with the limiting protrusion 12 of the first pipe protection device as described above, lower the second pipe protection device as described above, and make the second pipe protection device as described above and the first pipe protection device as described above connected to each other by mortise and tenon joints.

[0059] like Figure 6 As shown, a schematic diagram of the installation process of the pipeline protection device is provided. Because in this embodiment, the lifting lug 4 and the fixing pile 2 are connected to the protection body 1 by threaded connection, it is necessary to first install the lifting lug 4 and the fixing pile 2 on the protection body 1. After the assembly of the pipeline protection device is completed, the pipeline protection device is placed on the laying operation ship and transported to the top of the submarine pipeline 6 by the laying operation ship.

[0060] Then the laying operation ship grabs the lifting ear 4 and aligns the receiving groove 13 of the pipeline protection device with the submarine pipeline 6, and then lowers the pipeline protection device after alignment. After the pipeline protection device successfully covers the submarine pipeline 6 and the fixed pile 2 is successfully inserted into the seabed 7. The laying operation ship grabs the lifting ear 4 of the second pipeline protection device to lower the second pipeline protection device. When lowering the second pipeline protection device, it is not only necessary to align the second pipeline protection device with the submarine pipeline 6, but also necessary to align the limiting groove 11 of the second pipeline protection device with the limiting protrusion 12 of the first pipeline protection device, so that after the second pipeline protection device is lowered, it can form a mortise and tenon connection with the limiting protrusion 12 of the first pipeline protection device through the limiting groove 11. Then install the third and fourth pipeline protection devices in sequence until the installation of the pipeline protection device is completed.

[0061] In the present invention, the submarine pipeline 6 is placed by opening a receiving groove 13 on the protection body 1, thereby avoiding the work process of cutting grooves on the seabed 7 and improving the work efficiency.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A submarine pipeline protection device, characterized in that: include: A protection body (1), wherein a bottom surface of the protection body (1) is provided with a receiving groove (13) for receiving a submarine pipeline (6), and a height and a width of the receiving groove (13) are greater than or equal to a diameter of the submarine pipeline (6); A fixing pile (2), the fixing pile (2) being arranged on a side of the protective body (1) on which the receiving groove (13) is provided; The fixing pile (2) is used to be inserted into the seabed (7) when the protection body (1) covers the submarine pipeline (6) located on the seabed (7) through the containing groove (13).

2. The submarine pipeline protection device according to claim 1, characterized in that: Slides (3) are provided on both sides of the protection body (1), and the slides (3) extend obliquely downward from the center of the top of the protection body (1) to both sides.

3. The submarine pipeline protection device according to claim 1, characterized in that: The submarine pipeline protection device comprises a plurality of protection bodies (1), wherein a limiting groove (11) and a limiting protrusion (12) are respectively provided on the front and rear sides of the protection body (1) along the length direction of the submarine pipeline (6), and two adjacent protection bodies (1) are connected by mortise and tenon joints via the limiting groove (11) and the limiting protrusion (12).

4. The submarine pipeline protection device according to claim 3, characterized in that: The limiting groove (11) and the limiting protrusion (12) are cooperatively connected along the gravity direction, and the limiting groove (11) and the limiting protrusion (12) are mutually limited along the length direction of the submarine pipeline (6).

5. The submarine pipeline protection device according to claim 1, characterized in that: The side surface of the fixing pile (2) is also provided with a friction surface (21).

6. The submarine pipeline protection device according to claim 5, characterized in that: The friction surface (21) is a thread provided on the side surface of the fixing pile (2).

7. The submarine pipeline protection device according to claim 1, characterized in that: A plug (22) is provided at one end of the fixing pile (2) away from the protective body (1), and the diameter of the plug (22) gradually decreases in a direction away from the protective body (1).

8. The submarine pipeline protection device according to claim 1, characterized in that: The top of the protective body (1) is provided with a lifting ear (4).

9. The submarine pipeline protection device according to claim 1, characterized in that: A counterweight block (5) is provided on the top of the protective body (1).

10. A method for installing a submarine pipeline protection device, characterized in that: include: Transporting the submarine pipeline protection device according to any one of claims 1 to 9 to the top of the submarine pipeline; Grab the lifting lug (4) of the submarine pipeline protection device according to any one of claims 1 to 9, lower the submarine pipeline protection device according to any one of claims 1 to 9 onto the submarine pipeline, and accommodate the submarine pipeline through the accommodating groove (13); Grab the second submarine pipeline protection device according to any one of claims 1 to 9, align the limiting groove (11) of the second submarine pipeline protection device according to any one of claims 1 to 9 with the limiting protrusion (12) of the first submarine pipeline protection device according to any one of claims 1 to 9, lower the second submarine pipeline protection device according to any one of claims 1 to 9, and make the second submarine pipeline protection device according to any one of claims 1 to 9 and the first submarine pipeline protection device according to any one of claims 1 to 9 connected to each other by mortise and tenon joints.

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