Underwater operation system and method

Abstract

An underwater operation system and method. The system comprises a surface support vessel (100), a riser lifting device (200), and underwater operation devices (300). One end of the riser lifting device is arranged on the surface support vessel, a multifunctional riser foundation module (400) is detachably arranged on the other end of the riser lifting device, and the underwater operation devices are detachably connected to the multifunctional riser foundation module by means of flexible jumpers (500). By means of detachable connection design of the riser lifting device, the multifunctional riser foundation module, and the underwater operation devices, the underwater operation system can be conveniently assembled and disassembled underwater, and there is no need to perform assembling and disassembling on the deck of the surface support vessel, thereby conserving the deck area, enhancing the assembling and disassembling flexibility, and thus significantly improving the efficiency of assembling the underwater operation system and solving the problem of how to improve the efficiency of assembling the underwater operation system.

Description

Underwater operation system and method Technical Field

[0001] The present invention relates to the technical field of underwater operations, and in particular to an underwater operation system and method. Background Art

[0002] The ocean holds vast resources, such as natural gas and minerals. To access these resources, underwater operations are essential. While the accumulation of underwater operation technologies and the iterative advancement of key equipment have significantly improved the efficiency and safety of these operations, the complexities of wind, waves, currents, and the ocean climate have led to high commercial development costs and safety risks, a challenge that the industry urgently needs to address.

[0003] Currently, most underwater operations rely on a single unit, which not only limits efficiency but also increases costs. Furthermore, existing underwater equipment is difficult to connect and disconnect from surface support vessels, requiring a larger deck area on the surface support vessel to facilitate installation. Summary of the Invention

[0004] The object of the present invention is to provide an underwater operation system and method to at least solve the problem of how to improve the installation efficiency of the underwater operation system.

[0005] In order to solve the above technical problems, the present invention provides an underwater operation system, including a surface support vessel, a riser lifting device and an underwater operation device; one end of the riser lifting device is arranged on the surface support vessel, and the other end is detachably provided with a multifunctional riser basic module, and the underwater operation device is detachably connected to the multifunctional riser basic module through a flexible jumper bundle.

[0006] Optionally, in the underwater operation system, the riser lifting device includes a material transfer riser, a tailwater discharge riser, a lifting power umbilical cable bundle, an underwater operation umbilical cable, lifting equipment and a clamp; the two ends of the material transfer riser, the tailwater discharge riser and the underwater operation umbilical cable are respectively connected to the surface support vessel and the multi-functional riser basic module; the lifting equipment is installed on the material transfer riser to provide transmission power for the material in the material transfer riser; the lifting power umbilical cable bundle is used to provide energy and communication for the lifting equipment; the tailwater discharge riser, the lifting power umbilical cable bundle and the underwater operation umbilical cable are fixed to the material transfer riser through the clamp.

[0007] Optionally, in the underwater operation system, the multifunctional riser basic module includes a basic body, a hydraulic clamping mechanism and an underwater docking joint; one end of the material transfer riser is fixed to the underwater docking joint through the hydraulic clamping mechanism to communicate with the basic body.

[0008] Optionally, in the underwater operating system, the multifunctional riser base module further includes an underwater connector; one end of the flexible jumper bundle is detachably connected to the underwater connector.

[0009] Optionally, in the underwater operation system, a float is arranged on a portion of the outside of the flexible jumper tube bundle, and the float is used to provide buoyancy to the flexible jumper tube bundle to change the stress state of the flexible jumper tube bundle.

[0010] To solve the above technical problems, the present invention provides an underwater operation method for constructing an underwater operation system as described in any one of the above items, the underwater operation method comprising:

[0011] The surface support vessel travels to the operation location and deploys the multifunctional riser base module to the first target location underwater;

[0012] The surface support vessel deploys the underwater operating device to the second target location underwater;

[0013] The surface support vessel hoists the flexible jumper bundle to a preset position in the water;

[0014] The surface support vessel deploys an underwater operation robot, which then uses the robot to securely connect the two ends of the flexible jumper bundle to the multifunctional riser base module and the underwater operation device.

[0015] The surface support vessel deploys the riser lifting device into the water and uses an underwater operation robot to securely connect the end of the riser lifting device to the multifunctional riser base module.

[0016] The multifunctional riser base module is lifted to a preset height by the riser lifting device.

[0017] Optionally, in the underwater operation method, the method of fixedly connecting the end of the riser lifting device to the multifunctional riser base module by the underwater operation robot includes:

[0018] The underwater operation robot aligns the end of the riser lifting device with the underwater docking joint of the multifunctional riser base module;

[0019] The hydraulic clamping mechanism of the multifunctional riser basic module is used to lock and fix the end of the riser lifting device to the underwater docking joint.

[0020] Optionally, in the underwater operation method, the underwater operation method further includes:

[0021] Lower the multifunctional riser base module to the bottom of the water through the riser lifting device;

[0022] The hydraulic clamping mechanism is controlled to release so that the end of the riser lifting device is separated from the underwater docking joint.

[0023] Optionally, in the underwater operation method, the underwater operation method further includes:

[0024] The surface support vessel lowers the temporary plug-in module into the water and deploys the underwater operation robot;

[0025] Use the underwater operation robot to remove the end of the flexible jumper pipe bundle connected to the underwater operation device from the underwater operation device and insert it into the temporary plug-in module;

[0026] The surface support vessel lowers the hoisting cable;

[0027] Using an underwater operation robot to fix the underwater operation device to the lifting cable;

[0028] The surface support vessel recovers the lifting cable to recover the underwater operating equipment.

[0029] Optionally, in the underwater operation method, the underwater operation method further includes:

[0030] The surface support vessel deploys the underwater operating device to the second target location underwater;

[0031] Using an underwater operation robot, remove one end of the flexible jumper pipe bundle connected to the temporary plug-in module from the temporary plug-in module and insert it into the underwater operation device;

[0032] The surface support vessel recovers the temporary plug-in module.

[0033] The underwater operation system and method provided by the present invention include a surface support vessel, a riser lifting device, and an underwater operation device; one end of the riser lifting device is mounted on the surface support vessel, and the other end is detachably provided with a multifunctional riser base module. The underwater operation device is detachably connected to the multifunctional riser base module via a flexible jumper pipe bundle. By designing the riser lifting device, the multifunctional riser base module, and the underwater operation device to be detachably connected, the underwater operation system can be conveniently installed and disassembled underwater, eliminating the need for installation and disassembly on the deck of the surface support vessel. This not only saves deck space but also increases the flexibility of installation and disassembly, thereby effectively improving the installation efficiency of the underwater operation system and solving the problem of how to improve the installation efficiency of the underwater operation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic structural diagram of an underwater operation system provided in this embodiment;

[0035] FIG2 is a schematic diagram of the detailed structure of the underwater operation system provided in this embodiment;

[0036] FIG3 is a flow chart of the underwater operation method provided by this embodiment;

[0037] 4(A) to 4(J) are schematic structural diagrams of the underwater operation system corresponding to each step in the underwater operation method provided in this embodiment;

[0038] Among them, the description of each figure mark is as follows: 100-surface support vessel; 110-surface operation vessel; 120-auxiliary support vessel; 200-riser lifting device; 210-material transfer riser; 220-tailwater discharge riser; 230-lifting power umbilical cable bundle; 240-underwater operation umbilical cable; 250-lifting equipment; 260-clamp; 300-underwater operation device; 310-fixed joint; 400-multi-function riser basic module; 410-basic body; 420-underwater docking joint; 430-underwater connector; 500-flexible jumper bundle; 510-docking plug; 520-floating body; 600-underwater operation robot; 700-temporary plug-in module. DETAILED DESCRIPTION

[0039] The following is a detailed description of the underwater operation system and method proposed by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are highly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention. Furthermore, the structures depicted in the drawings are often portions of actual structures. In particular, different drawings may utilize different scales, depending on the emphasis they require.

[0040] It should be noted that the terms "first", "second", etc. in the specification, claims, and accompanying drawings of the present invention are used to distinguish similar objects in order to describe the embodiments of the present invention, and are not used to describe a specific order or sequence. It should be understood that the structures used in this way can be interchanged under appropriate circumstances. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products, or apparatuses.

[0041] This embodiment provides an underwater operation system, as shown in Figure 1, including a surface support vessel 100, a riser lifting device 200 and an underwater operation device 300; one end of the riser lifting device 200 is arranged on the surface support vessel 100, and the other end is detachably provided with a multifunctional riser base module 400. The underwater operation device 300 is detachably connected to the multifunctional riser base module 400 via a flexible jumper bundle 500.

[0042] The underwater working system provided in this embodiment adopts a detachable connection design for the riser lifting device 200, the multifunctional riser base module 400 and the underwater working device 300, so that the underwater working system can be conveniently installed and disassembled underwater, thereby eliminating the need for installation and disassembly on the deck of the surface support vessel 100. This not only saves deck area but also increases the flexibility of installation and disassembly, thereby effectively improving the installation efficiency of the underwater working system and solving the problem of how to improve the installation efficiency of the underwater working system.

[0043] Specifically, in this embodiment, as shown in Figure 2, the riser lifting device 200 includes a material transfer riser 210, a tailwater discharge riser 220, a lifting power umbilical cable bundle 230, an underwater operation umbilical cable 240, a lifting equipment 250 and a clamp 260; the two ends of the material transfer riser 210, the tailwater discharge riser 220 and the underwater operation umbilical cable 240 are respectively connected to the surface support vessel 100 and the multi-functional riser base module 400; the lifting equipment 250 is installed on the material transfer riser 210, and is used to provide transmission power for the material in the material transfer riser 210; the lifting power umbilical cable bundle 230 is used to provide energy and communication for the lifting equipment 250; the tailwater discharge riser 220, the lifting power umbilical cable bundle 230 and the underwater operation umbilical cable 240 are fixed to the material transfer riser 210 by the clamp 260.

[0044] In this way, materials (such as ore) retrieved by the underwater working device 300 can be delivered to the surface support vessel 100 via the material transfer riser 210. In practice, to ensure that materials can smoothly reach the surface support vessel 100 from the bottom, multiple lifting devices 250 can be installed at different locations on the material transfer riser 210, thereby ensuring sufficient power for the material to be transported upstream. Furthermore, to prevent entanglement of the various tube bundles and cables, this embodiment utilizes multiple clamps 260 to bundle the tube bundles. This prevents entanglement of the tube bundles and cables while also optimizing the installation process of the riser lifting device 200.

[0045] Furthermore, in this embodiment, the multifunctional riser basic module 400 includes a basic body 410, a hydraulic clamping mechanism (not shown in the figure) and an underwater docking joint 420; one end of the material transfer riser 210 is fixed to the underwater docking joint 420 through the hydraulic clamping mechanism to communicate with the basic body 410.

[0046] In actual use, the multifunctional riser base module 400 serves as a transit and tensioning force provider, connecting the underwater working device 300 to the riser lifting device 200, thereby facilitating material transfer. A hydraulic clamping mechanism and underwater docking joint 420 enable the base body 410 and the material transfer riser 210 to be secured or detached underwater, enhancing the flexibility of the underwater working system installation. The base body 410 also possesses a certain weight, which provides a certain tension force for the riser lifting device 200 to maintain its vertical position, facilitating linear material transfer. The hydraulic clamping mechanism can be controlled wirelessly or wired, allowing personnel on the surface support vessel 100 to control the hydraulic clamping mechanism and secure or detach the multifunctional riser base module 400 from the riser lifting device 200.

[0047] Furthermore, in this embodiment, the multifunctional riser base module 400 further includes an underwater connector 430 ; one end of the flexible jumper bundle 500 is detachably connected to the underwater connector 430 .

[0048] Specifically, in this embodiment, one end of the flexible jumper bundle 500 that is assembled with the underwater connector 430 is provided with a docking plug 510 that matches the underwater connector. By inserting the docking plug 510 into the underwater connector 430, the connection between the flexible jumper bundle 500 and the multifunctional riser base module 400 can be completed.

[0049] Preferably, in order to connect multiple underwater working devices 300 to the same multifunctional riser base module 400, thereby improving the operating efficiency of the underwater working system, in this embodiment, multiple underwater connectors 430 can be provided on the base body 410, so that multiple flexible jumper bundles 500 can be connected, and then multiple underwater working devices 300 can be connected.

[0050] In addition, in order to enable the materials acquired by the underwater working device 300 to smoothly enter the multifunctional riser basic module 400 through the flexible jumper bundle 500, in this embodiment, a float 520 is arranged on the outside of part of the flexible jumper bundle 500. The float 520 is used to provide buoyancy to the flexible jumper bundle 500 to change the stress state of the flexible jumper bundle 500, so that the flexible jumper bundle 500 obtains a reasonable linear structure, thereby alleviating the coupling movement between the underwater working device 300 and the multifunctional riser basic module 400.

[0051] Furthermore, in order to achieve the connection between the flexible jumper tube bundle 500 and the underwater working device 300, in this embodiment, the underwater working device 300 is provided with a fixed joint 310. When the end of the flexible jumper tube bundle 500 connected to the underwater working device 300 is inserted into the fixed joint 310, the fixed joint 310 is locked, thereby fixing the flexible jumper tube bundle 500 to the fixed joint 310.

[0052] Of course, in actual applications, those skilled in the art can select docking and fixing parts such as the fixed joint 310, the underwater connector 430 and the docking plug 510 according to actual needs to achieve the mutual connection and fixation of various components, and this application does not impose any restrictions on this.

[0053] This embodiment further provides an underwater operation method for constructing the underwater operation system as described above. As shown in FIG3 , the underwater operation method includes:

[0054] S1: The surface support vessel travels to the operation location and deploys the multifunctional riser base module to the first target location underwater.

[0055] S2, the surface support vessel deploys the underwater operating device to the second target position on the bottom of the water;

[0056] S3, the surface support vessel hoists the flexible jumper bundle to a preset position in the water;

[0057] S4, the surface support vessel deploys an underwater operating robot, and uses the underwater operating robot to securely connect both ends of the flexible jumper bundle to the multifunctional riser base module and the underwater operating device, respectively;

[0058] S5, the surface support vessel deploys the riser lifting device into the water, and uses the underwater operation robot to securely connect the end of the riser lifting device to the multifunctional riser base module;

[0059] S6, lift the multifunctional riser base module to a preset height using the riser lifting device.

[0060] In the underwater operation method provided in this embodiment, most of the installation process is carried out underwater, so there is no need to occupy a large area of ​​the deck of the surface support vessel for water installation, thus saving deck area; at the same time, since this method can be installed and disassembled underwater, it improves the convenience and flexibility of the underwater operation system layout, can quickly handle underwater fault points, and improves the efficiency of underwater operations.

[0061] The following describes in detail the implementation process of each step of the underwater operation method provided in this embodiment:

[0062] In step S1, as shown in Figure 4(A), a surface support vessel 100 travels to the operation location and deploys the multifunctional riser base module 400 to a first target underwater location. Specifically, the surface support vessel 100 can be an auxiliary support vessel, carrying various components required for underwater operations.

[0063] In step S2, as shown in Figure 4(B), the surface support vessel 100 deploys the underwater working device 300 to the second target underwater location. Specifically, the surface support vessel 100 can also be an auxiliary support vessel, and the underwater working device 300 can be a mining vehicle, etc., depending on the actual needs of the underwater operation.

[0064] In step S3, as shown in FIG4(C), the surface support vessel 100 lowers the flexible jumper tube bundle 500 to a preset position in the water. Specifically, the surface support vessel 100, which can also be an auxiliary support vessel, uses two hoist cables to lower the ends of the flexible jumper tube bundle 500, respectively. This facilitates the location of the ends of the flexible jumper tube bundle 500 during subsequent installation, preventing the flexible jumper tube bundle 500 from shifting during installation.

[0065] In step S4, as shown in FIG4(D), the surface support vessel 100 deploys the underwater working robot 600, which then securely connects the ends of the flexible jumper bundle 500 to the multi-function riser base module 400 and the underwater working device 300, respectively. Specifically, the underwater working robot 600 first inserts one end of the flexible jumper bundle 500 into the fixed connector of the underwater working device 300 to achieve a secure connection with the underwater working device 300; then, the docking plug 510 on the other end of the flexible jumper bundle 500 is inserted into the underwater connector of the multi-function riser base module 400 to achieve a secure connection with the multi-function riser base module 400.

[0066] In step S5, as shown in FIG4(E), the surface support vessel 100 deploys the riser hoist 200 into the water and securely connects the distal end of the riser hoist 200 to the multifunctional riser base module 400 via the underwater working robot 600. Specifically, the surface support vessel 100 is a surface work vessel, such as a mining vessel, used to collect material (e.g., ore) delivered by the material transfer riser. Therefore, the surface support vessel 100 is securely connected to one end of the riser hoist 200. After the surface support vessel 100 reaches a position corresponding to the multifunctional riser base module 400, the distal end (free end) of the riser hoist 200 is lowered into the water. The underwater working robot 600 aligns the distal end of the riser hoist 200 with the underwater docking joint 420 of the multifunctional riser base module 400. The hydraulic clamping mechanism of the multifunctional riser base module 400 secures the distal end of the riser hoist 200 to the underwater docking joint 420.

[0067] In step S6, as shown in FIG4(F), the multifunctional riser base module 400 is raised to a predetermined height by the riser lifting device 200. Specifically, referring to the above steps, the connection between the multiple underwater working devices 300 and the multifunctional riser base module 400 is completed. Furthermore, by raising the multifunctional riser base module 400 to a predetermined height by the riser lifting device 200, the riser lifting device 200 remains vertically under the action of gravity on the multifunctional riser base module 400, thereby facilitating the upward transport of materials.

[0068] At this point, the underwater operation system has been installed and underwater operations can be carried out normally.

[0069] When the surface support vessel (surface operation vessel) needs to return to the dock for maintenance, or encounters an emergency such as extreme weather such as wind, waves, tsunamis, etc., it needs to be separated from the multifunctional riser base module to ensure the safety of the surface support vessel. At this time, in this embodiment, first, as shown in Figure 4 (G), the multifunctional riser base module 400 is lowered to the bottom of the water through the riser lifting device 200; then, as shown in Figure 4 (H), the hydraulic clamping mechanism is controlled to loosen so that the end of the riser lifting device 200 is separated from the underwater docking joint 420; finally, the riser lifting device 200 is recovered so that the surface support vessel can return. When it is necessary to connect the riser lifting device 200 to the multifunctional riser base module 400 again, repeat the above steps S5 and S6.

[0070] Furthermore, considering that the underwater working device 300 requires regular maintenance or needs to be recovered and replaced when an abnormal fault occurs, in order to facilitate the replacement of the underwater working device 300 and improve the efficiency of underwater operations, in this embodiment, a method for replacing the underwater working device is provided, including:

[0071] First, as shown in Figure 4 (I), the surface support vessel (auxiliary support vessel) 120 lowers the temporary plug-in module 700 into the water and deploys the underwater working robot 600; when the temporary plug-in module 700 is located at the bottom of the water, the underwater working robot 600 is used to remove the end of the flexible jumper bundle 500 connected to the underwater working device 300 from the underwater working device 300 and insert it into the temporary plug-in module 700.

[0072] Then, as shown in Figure 4(J), the surface support vessel (auxiliary support vessel) 120 lowers the hoisting cable, uses the underwater working robot 600 to fix the underwater working device 300 to the hoisting cable, and the surface support vessel (auxiliary support vessel) 120 recovers the hoisting cable to recover the underwater working device 300; then, the new underwater working device 300 is deployed to the second target position on the bottom of the water according to the above step S2, and the underwater working robot 600 is used to remove the end of the flexible jumper bundle 500 connected to the temporary plug-in module 700 from the temporary plug-in module 700 and insert it into the underwater working device 300.

[0073] Finally, the surface support vessel (auxiliary support vessel) 120 retrieves the temporary plug-in module 700 and, in accordance with step S6 above, lifts the multifunctional riser base module 400 to a preset height using the riser lifting device 200, thereby completing the replacement of the underwater working device 300.

[0074] In this way, by cooperating with the surface work vessel 110 and the auxiliary support vessel 120, the underwater work robot 600 can conveniently complete the installation and component replacement of the underwater work system. Although the above example only describes the replacement steps of the underwater work device 300, those skilled in the art can also use this method to understand how to replace the underwater flexible jumper bundle 500 or the multi-functional riser base module 400.

[0075] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. In addition, the different parts between the various embodiments can also be used in combination with each other, and the present invention is not limited to this.

[0076] The underwater operation system and method provided in this embodiment include a surface support vessel, a riser hoist, and an underwater operation device. One end of the riser hoist is mounted on the surface support vessel, and the other end is detachably mounted with a multifunctional riser base module. The underwater operation device is detachably connected to the multifunctional riser base module via a flexible jumper tube. By designing the riser hoist, the multifunctional riser base module, and the underwater operation device to be detachably connected, the underwater operation system can be conveniently installed and disassembled underwater, eliminating the need for installation and disassembly on the deck of the surface support vessel. This not only saves deck space but also increases installation and disassembly flexibility, thereby effectively improving the installation efficiency of the underwater operation system and resolving the problem of how to improve the installation efficiency of the underwater operation system.

[0077] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An underwater operation system, characterized in that, It includes a surface support vessel, a riser lifting device, and an underwater operation device; one end of the riser lifting device is arranged on the surface support vessel, and a multi-functional riser foundation module is detachably arranged at the other end. The underwater operation device is detachably connected to the multi-functional riser foundation module through a flexible jumper bundle; the riser lifting device includes a material transfer riser, a tail water discharge riser, a lifting power umbilical cable bundle, an underwater operation umbilical cable, a lifting equipment, and a clamp; both ends of the material transfer riser, the tail water discharge riser, and the underwater operation umbilical cable are connected to the surface support vessel and the multi-functional riser foundation module respectively; the multi-functional riser foundation module includes a foundation body, a hydraulic clamping mechanism, an underwater docking head, and an underwater connector; one end of the material transfer riser is fixed to the underwater docking head through the hydraulic clamping mechanism to communicate with the foundation body; one end of the flexible jumper bundle is detachably connected to the underwater connector; a floating body is arranged on a part of the outer side of the flexible jumper bundle, and the floating body is used to provide buoyancy for the flexible jumper bundle to change the stress state of the flexible jumper bundle; the lifting equipment is installed on the material transfer riser and is used to provide transmission power for the materials in the material transfer riser; the lifting power umbilical cable bundle is used to provide energy and communication for the lifting equipment; the tail water discharge riser, the lifting power umbilical cable bundle, and the underwater operation umbilical cable are fixed to the material transfer riser through the clamp.

2. An underwater operation method, which uses the underwater operation system described in claim 1, characterized in that The underwater operation method includes: The surface support vessel sails to the operation position and places the multi-functional riser foundation module at the first target position on the bottom of the water. The surface support vessel places the underwater operation device at the second target position on the bottom of the water. The surface support vessel lowers and suspends the flexible jumper bundle to a preset position in the water. The surface support vessel deploys an underwater operation robot, and through the underwater operation robot, both ends of the flexible jumper bundle are respectively fixedly connected to the multi-functional riser foundation module and the underwater operation device. The surface support vessel deploys the riser lifting device into the water, and through the underwater operation robot, the end of the riser lifting device is fixedly connected to the multi-functional riser foundation module. The multi-functional riser foundation module is lifted to a preset height through the riser lifting device.

3. The underwater operation method according to claim 1, wherein The method for fixedly connecting the end of the riser lifting device to the multi-functional riser foundation module through the underwater operation robot includes: The underwater operation robot aligns the end of the riser lifting device with the underwater docking head of the multi-functional riser foundation module. The hydraulic clamping mechanism of the multi-functional riser foundation module is used to lock and fix the end of the riser lifting device to the underwater docking head.

4. The underwater operation method according to claim 3, characterized in that, The underwater operation method further includes: The multi-functional riser foundation module is lowered to the bottom of the water through the riser lifting device. The hydraulic clamping mechanism is controlled to loosen so that the end of the riser lifting device is separated from the underwater docking head.

5. The underwater operation method according to claim 2, characterized in that, The underwater operation method further includes: The surface support vessel lowers and suspends a temporary pluggable module into the water and deploys an underwater operation robot. The underwater operation robot removes the end of the flexible jumper bundle connected to the underwater operation device from the underwater operation device and inserts it into the temporary pluggable module. The surface support vessel lowers the suspension cable. Fix an underwater operation device to a suspension cable by using an underwater operation robot; The surface support vessel retrieves the suspension cable to retrieve the underwater operation device.

6. The underwater operation method according to claim 5, characterized in that, The underwater operation method further includes: The surface support vessel deploys the underwater operation device to a second target position on the seabed; Use an underwater operation robot to remove one end of the flexible crossover pipe bundle connected to the temporary connection and disconnection module from the temporary connection and disconnection module and insert it into the underwater operation device; The surface support vessel retrieves the temporary connection and disconnection module.

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