Pipeline supporting structure on underwater anti-sinking plate platform

Abstract

The utility model discloses a pipeline supporting structure on an underwater anti-sinking plate platform, which comprises a first supporting assembly and a second supporting assembly, the first supporting assembly and the second supporting assembly are connected on a top plate at an interval, a terminal manifold of a pipeline is fixed on the top plate, and the first supporting assembly and the second supporting assembly are connected on the top plate at intervals. The terminal manifold of the pipeline is connected with the flexible vertical pipe; the end, away from the top plate, of the first supporting assembly is connected to the fender platform, the end, away from the top plate, of the second supporting assembly is hinged to the fender platform, and the inclination angle of the top plate is changed by adjusting the length of the first supporting assembly. According to the pipeline supporting structure on the underwater fender platform, the terminal manifold to be connected with the flexible vertical pipe is fixed to the top plate, the inclination angle of the top plate is changed by adjusting the length of the first supporting assembly, angle adjustment of the terminal manifold is achieved, and butt joint connection of the terminal manifold and the flexible vertical pipe is facilitated. The structure is simple, and the underwater connection precision is improved.

Description

Technical Field

[0001] This utility model belongs to the field of underwater pipeline terminal manifold installation technology, and particularly relates to a pipeline support structure on an underwater anti-sinking plate platform. Background Technology

[0002] In subsea production systems for offshore oil and gas field development, there is an "L"-shaped pipeline terminal manifold positioned between a flexible riser and a subsea pipeline (horizontal pipe). This manifold is composed of seven parts in sequence: a swivel flange, an anchor flange, a double-layer bend, a double-layer straight pipe, anchors, a single-layer straight pipe, and a flat-face welded flange. The swivel flange connects to the flexible riser, and the flat-face welded flange connects to the subsea pipeline. Its core function is to achieve the connection and transition between the flexible riser and the subsea pipeline (horizontal pipe), so that oil and gas resources can be sequentially transferred through the subsea pipeline, the pipeline terminal manifold, and the flexible riser, ultimately reaching the floating storage and offloading (FPSO) unit.

[0003] To ensure a stable orientation of the pipeline terminal manifold during underwater connection, prevent subsidence upon landing on the seabed, and reduce the impact of ocean currents and other factors on the connection operation, the pipeline terminal manifold is generally designed to be connected to an anti-sinking plate platform to achieve the connection between the pipeline terminal manifold and the riser.

[0004] However, this type of pipeline terminal manifold has a special structure and extremely stringent requirements for the accuracy of its orientation. Directly fixing the pipeline terminal manifold to the dustproof plate platform cannot guarantee the stability of the pipeline terminal manifold during connection and service, and the connection accuracy and safety cannot be guaranteed.

[0005] Therefore, it is urgent to design a pipeline support structure for an underwater anti-sinking plate platform to solve the problems mentioned above. Utility Model Content

[0006] To address the technical problem mentioned in the background art, where directly fixing the pipeline terminal manifold to the dustproof plate platform cannot guarantee the stability of the pipeline terminal manifold connection and its attitude during service, a pipeline support structure on an underwater anti-sinking plate platform is provided to solve the problem that the pipeline terminal manifold cannot be directly fixed to the dustproof plate platform.

[0007] To achieve the above objectives, the specific technical solution for the pipeline support structure on the underwater anti-sinking plate platform of this utility model is as follows:

[0008] A pipeline support structure on an underwater anti-sinking plate platform includes a first support component and a second support component. The first support component and the second support component are connected at intervals to a top plate. A terminal manifold of the pipeline is fixed on the top plate so that the terminal manifold of the pipeline can be connected to a flexible riser. The end of the first support component away from the top plate is connected to the anti-sinking plate platform, and the end of the second support component away from the top plate is hinged to the anti-sinking plate platform. The length of the first support component can be adjusted to change the tilt angle of the top plate.

[0009] Furthermore, the first support component consists of two first support legs that are spaced apart and connected to the anti-sinking plate platform, with the ends of the two first support legs away from the anti-sinking plate platform connected to the end of the top plate.

[0010] Furthermore, the second support assembly consists of two second support legs that are hinged at intervals to the anti-sinking plate platform, with the ends of the two second support legs away from the anti-sinking plate platform connected to the end of the top plate.

[0011] Furthermore, the first support leg includes a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is hinged to the anti-sinking plate platform, and the second connecting pipe is installed inside the first connecting pipe. The end of the second connecting pipe away from the first connecting pipe is connected to the top plate.

[0012] Furthermore, the second connecting pipe is slidably disposed along the first connecting pipe to change the tilt angle of the top plate.

[0013] Furthermore, multiple limiting holes are correspondingly provided on the first connecting pipe and the second connecting pipe. Bolts are inserted into the limiting holes of the first connecting pipe and the second connecting pipe to fix the length of the second connecting pipe extending beyond the first connecting pipe.

[0014] Furthermore, a through hole is provided on the top plate, and a terminal manifold of the pipeline is connected inside the through hole. The terminal manifold of the pipeline is connected to the flexible riser through a rotating flange.

[0015] Furthermore, a connection hole is provided on the top plate, and an anchoring flange for the terminal manifold is connected to the connection hole to fix the terminal manifold to the top plate.

[0016] Furthermore, pipe clamps are installed on the anti-sinking slab platform, and the side of the pipe away from the top slab is fixed to the anti-sinking slab platform by the pipe clamps.

[0017] Furthermore, a flat-faced flange is installed at the end of the pipeline furthest from the terminal manifold, and the pipeline is connected to the submarine pipeline through the flat-faced flange.

[0018] The pipeline support structure on the underwater anti-sinking plate platform of this utility model has the following advantages:

[0019] The top plate is fixed to the anti-sinking platform using a first and a second support assembly, and the terminal manifold to be connected to the flexible riser is fixed to the top plate. By adjusting the length of the first support assembly, the tilt angle of the top plate is changed, thereby adjusting the angle of the terminal manifold and facilitating its connection with the flexible riser. This application's support structure is simple in construction, ensuring the stability of the pipeline's terminal manifold connection and its attitude during service, facilitating underwater connection operations, and improving underwater connection accuracy, efficiency, and safety. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of the pipeline support structure on the underwater anti-sinking plate platform of this utility model.

[0021] Figure 2 This is a front view of the pipeline support structure on the underwater anti-sinking plate platform of this utility model;

[0022] Figure 3 This is a schematic diagram of the overall structure of the pipeline of this utility model.

[0023] Explanation of markings in the diagram:

[0024] 1. First support leg; 2. Second support leg; 3. Top plate; 4. Pipeline; 5. Terminal manifold; 6. Anti-sinking plate platform; 7. Through hole; 8. Rotary flange; 9. Connection hole; 10. Anchor flange; 11. Pipe clamp; 12. Flat welding flange; 13. Lifting lug; 14. Bend section; 15. Straight section; 16. Main stiffening plate; 17. Secondary stiffening plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0027] The following is a reference to the appendix. Figure 1 To be continued Figure 3 This invention describes the pipe support structure on an underwater anti-sinking plate platform.

[0028] like Figure 1 and Figure 3 As shown, the pipeline support structure on the underwater anti-sinking plate platform of this utility model includes a first support component and a second support component. The first support component and the second support component are connected at intervals on the top plate 3. The terminal manifold 5 of the pipeline 4 is fixed on the top plate 3 so that the terminal manifold 5 of the pipeline 4 is connected to the flexible riser. The end of the first support component away from the top plate 3 is connected to the anti-sinking plate platform 6, and the end of the second support component away from the top plate 3 is hinged to the anti-sinking plate platform 6. The length of the first support component is adjusted to change the tilt angle of the top plate.

[0029] The top plate 3 is fixed to the anti-sinking platform 6 by the first and second support components, and the terminal manifold 5, which is to be connected to the flexible riser, is fixed to the top plate 3. By adjusting the length of the first support component, the tilt angle of the top plate 3 is changed, thereby adjusting the angle of the terminal manifold 5, which facilitates the docking and connection of the terminal manifold 5 with the flexible riser. The support structure of this application has a simple construction, which can ensure the stability of the pipeline terminal manifold connection and its attitude during service, facilitate the operability of underwater connection, and improve the accuracy, efficiency and safety of underwater connection.

[0030] Furthermore, such as Figure 1 As shown, the first support assembly consists of two first support legs 1 that are spaced apart and connected to the anti-sinking plate platform 6, with the ends of the two first support legs 1 away from the anti-sinking plate platform 6 connected to the end of the top plate 3; the second support assembly consists of two second support legs 2 that are spaced apart and hinged to the anti-sinking plate platform 6, with the ends of the two second support legs 2 away from the anti-sinking plate platform 6 connected to the end of the top plate 3.

[0031] The first support leg 1 includes a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is hinged to the anti-sinking plate platform 6. The second connecting pipe is installed inside the first connecting pipe. The end of the second connecting pipe away from the first connecting pipe is connected to the top plate 3. The second connecting pipe is slidably installed along the first connecting pipe to change the tilt angle of the top plate 3.

[0032] In this embodiment, preferably, the first support component includes two first support legs 1, which are connected at intervals to the anti-sinking plate platform 6, and the ends of the two first support legs 1 away from the anti-sinking plate platform 6 are connected at intervals to one side of the top plate 3.

[0033] The second support assembly includes two second support legs 2, which are spaced apart and hinged to the anti-sinking platform 6. The ends of the two second support legs 2 away from the anti-sinking platform 6 are connected at intervals to the side of the top plate 3 away from the first support leg 1, thereby enabling the top plate to be placed on the anti-sinking platform.

[0034] In a preferred embodiment, the first support leg 1 and the second support leg 2 on the same side are arranged in a figure-eight shape.

[0035] Preferably, the first support leg 1 is composed of a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is hinged to the anti-sinking plate platform 6, and the second connecting pipe is slidably provided at the end of the first connecting pipe away from the anti-sinking plate platform 6. The end of the second connecting pipe away from the first connecting pipe is hinged to the top plate 3. By adjusting the length of the second connecting pipe extending out of the first connecting pipe, the tilt angle of the top plate 3 can be changed, thereby changing the position and connection angle of the terminal manifold 5.

[0036] Furthermore, such as Figure 1As shown, multiple limiting holes are correspondingly provided on the first connecting pipe and the second connecting pipe. Bolts are inserted into the limiting holes of the first connecting pipe and the second connecting pipe to fix the length of the second connecting pipe extending beyond the first connecting pipe.

[0037] In this embodiment, preferably, multiple limiting holes are opened along the length direction of the first connecting pipe and the second connecting pipe. When it is necessary to change the tilt angle of the top plate 3, the length of the second connecting pipe extending out of the first connecting pipe is adjusted, and the corresponding limiting holes are inserted by bolts to fix the position between the second connecting pipe and the first connecting pipe, thereby realizing the change of the tilt angle of the top plate 3.

[0038] In a preferred embodiment, during the land prefabrication process, a lifting lug 13 is welded to the side of the top plate 3 away from the first support leg 1. The lifting lug 13 is connected to a lifting device to realize the lifting of the top plate 3 and the change of its angle. When the angle of the top plate 3 is determined, the tilt angle of the top plate 3 can be fixed by inserting bolts into the limiting holes of the first connecting pipe and the second connecting pipe.

[0039] Since the second support leg 2 is hinged to both the top plate 3 and the anti-sinking platform 6, the second support leg 2 will rotate as the angle of the top plate 3 is changed, thereby adjusting the angle of the top plate 3.

[0040] Furthermore, such as Figure 1 and Figure 2 As shown, a through hole 7 is provided on the top plate 3, and a terminal manifold 5 of the pipe 4 is connected to the through hole 7. The terminal manifold 5 of the pipe 4 is connected to the flexible riser through a rotating flange 8. A connection hole 9 is provided on the top plate 3, and an anchoring flange 10 of the terminal manifold 5 is connected to the connection hole 9 to fix the terminal manifold 5 to the top plate 3. A pipe clamp 11 is provided on the anti-sinking plate platform 6, and the side of the pipe 4 away from the top plate 3 is fixed to the anti-sinking plate platform 6 through the pipe clamp 11. A flat welding flange 12 is provided at the end of the pipe 4 away from the terminal manifold 5, and the pipe 4 is connected to the subsea pipeline through the flat welding flange 12.

[0041] In this embodiment, preferably, a through hole 7 matching the shape of the pipe 4 is provided at the center of the top plate 3, and multiple connection holes 9 are provided at intervals along the circumference of the through hole 7. The anchoring flange 10 of the terminal manifold 5 is connected to the connection hole 9 of the top plate 3 by bolts. A rotating flange 8 is provided at one end of the terminal manifold 5 extending out of the through hole 7 of the top plate 3, and the connection between the terminal manifold 5 and the flexible riser is realized by the rotating flange 8.

[0042] In a preferred embodiment, the lower side of the terminal manifold 5 of pipeline 4 is a bend 14, and the pipeline abuts against the anti-sinking platform 6 to form a straight section 15. Pipe clamps 11 are spaced apart on the anti-sinking platform 6 to fix the straight section 15 of pipeline 4. The port of the straight section 15 is connected to the subsea pipeline through a flat-welded flange 12, so that oil and gas resources can be sequentially transferred through the subsea pipeline, the pipeline terminal manifold 5, and the flexible riser to the floating storage and offloading unit.

[0043] Because the pipeline support structure is prefabricated on land and is lowered to the seabed along with the anti-sinking platform for use, the stability of the connection between the first support leg 1, the second support leg 2, and the top plate 3 will be affected by wind, waves, and seabed pressure.

[0044] Therefore, as a preferred embodiment, while ensuring that the tilt angle of the top plate 3 meets the connection standard of the terminal manifold 5, main stiffening plates 16 are welded between the first support leg 1 and the first support leg 1, between adjacent first support leg 1 and second support leg 2, and between the second support leg 2 and the second support leg 2 for reinforcement. The main stiffening plates 16 are vertically welded to the bottom of the top plate 3, thereby fixing the first support leg 1 and the second support leg 2 to the top plate 3.

[0045] Meanwhile, a secondary stiffening plate 17 is vertically welded below the top plate 3. Since the first support leg 1 and the second support leg 2 are both connected to the ends of the top plate 3, the ends of the secondary stiffening plate 17 must be welded to the first support leg 1 and the second support leg 2 to reinforce the connection structure between the first support leg 1, the second support leg 2 and the top plate 3.

[0046] Preferably, the secondary stiffener 17 is arranged radially along the through hole of the top plate 3, which can improve the structural stability when the top plate 3 is connected to the terminal manifold 5.

[0047] The construction principle of the pipeline support structure on the underwater anti-sinking plate platform of this utility model is as follows:

[0048] First, lift the top plate 3, and then hinge the two first support legs 1 and the two second support legs 2 at intervals between the anti-sinking plate platform 6 and the top plate 3.

[0049] Then, adjust the tilt angle of the top plate 3. After the tilt angle of the top plate 3 is determined, fix the position between the first connecting pipe and the second connecting pipe with bolts.

[0050] Then, the terminal manifold 5 is fixed to the top plate 3, and the straight pipe section 15 is fixed to the anti-sinking plate platform 6 by pipe clamp 11;

[0051] Finally, the anti-sinking platform 6 is hoisted into the construction area to connect the terminal manifold 5 with the flexible riser.

[0052] Based on the pipeline support structure on the underwater anti-sinking plate platform, this utility model uses a first support leg 1 and a second support leg 2 to fix the top plate 3 onto the anti-sinking plate platform 6, and fixes the terminal manifold 5, which is to be connected to the flexible riser, onto the top plate 3. By adjusting the length of the second connecting pipe extending beyond the first connecting pipe, the tilt angle of the top plate 3 is changed, thereby achieving angle adjustment of the terminal manifold 5, facilitating the docking and connection of the terminal manifold 5 with the flexible riser. The support structure of this application has a simple construction, can ensure the stability of the pipeline terminal manifold connection and its attitude during service, facilitates the operability of underwater connection, and improves the accuracy, efficiency, and safety of underwater connection.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pipe support structure on an underwater anti-sinking plate platform, characterized in that, It includes a first support component and a second support component, which are connected at intervals on the top plate. The top plate is fixed with a terminal manifold of the pipe so that the terminal manifold of the pipe can be connected to the flexible riser. The first support component is connected to the anti-sinking plate platform at the end furthest from the top plate, and the second support component is hinged to the anti-sinking plate platform at the end furthest from the top plate. The length of the first support component is adjusted to change the tilt angle of the top plate.

2. The pipeline support structure on the underwater anti-sinking plate platform according to claim 1, characterized in that, The first support assembly consists of two first support legs that are spaced apart and connected to the anti-sinking plate platform. The ends of the two first support legs that are away from the anti-sinking plate platform are both connected to the end of the top plate.

3. The pipeline support structure on the underwater anti-sinking plate platform according to claim 1, characterized in that, The second support assembly consists of two second support legs that are hinged at intervals to the anti-sinking plate platform, with the ends of the two second support legs away from the anti-sinking plate platform connected to the end of the top plate.

4. The pipeline support structure on the underwater anti-sinking plate platform according to claim 2, characterized in that, The first support leg includes a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is hinged to the anti-sinking plate platform, and the second connecting pipe is installed inside the first connecting pipe. The end of the second connecting pipe away from the first connecting pipe is connected to the top plate.

5. The pipeline support structure on the underwater anti-sinking plate platform according to claim 4, characterized in that, The second connecting pipe is slidably installed along the first connecting pipe to change the tilt angle of the top plate.

6. The pipeline support structure on the underwater anti-sinking plate platform according to claim 5, characterized in that, Multiple limiting holes are provided on the first and second connecting pipes respectively. Bolts are inserted into the limiting holes of the first and second connecting pipes to fix the length of the second connecting pipe extending beyond the first connecting pipe.

7. The pipeline support structure on the underwater anti-sinking plate platform according to claim 1, characterized in that, The top plate has a through hole, and the terminal manifold of the pipe is connected to the through hole. The terminal manifold of the pipe is connected to the flexible riser through a rotating flange.

8. The pipeline support structure on the underwater anti-sinking plate platform according to claim 1, characterized in that, The top plate has connection holes, and anchoring flanges for the terminal manifold are connected to the connection holes to fix the terminal manifold to the top plate.

9. The pipeline support structure on the underwater anti-sinking plate platform according to claim 1, characterized in that, Pipe clamps are installed on the anti-sinking slab platform, and the side of the pipe away from the top slab is fixed to the anti-sinking slab platform by the pipe clamps.

10. The pipeline support structure on the underwater anti-sinking plate platform according to claim 1, characterized in that, A flat-faced flange is installed at the end of the pipeline away from the terminal manifold, and the pipeline is connected to the submarine pipeline through the flat-faced flange.

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