Method for semi-submersible barge and crane ship combined operation of jacket horizontal launching installation

Abstract

The application provides a method for semi-submersible barge and crane ship joint operation of jacket horizontal launching installation, which comprises the following steps: installing the jacket horizontally on the semi-submersible barge, transporting the jacket by the semi-submersible barge to a target sea area; controlling the crane ship and the semi-submersible barge to sail to a pre-launching installation position; hanging the sling on the crane ship and the jacket; removing the binding member; controlling the semi-submersible barge to dive to a preset depth; controlling the crane ship to lift the jacket and separate the jacket from the semi-submersible barge; controlling the semi-submersible barge to sail out of the operation area; controlling the crane ship to hoist and lower the jacket; filling water to the jacket to keep the jacket upright; and installing the jacket on the seabed. The application is suitable for jacket horizontal loading and transportation, the launching installation method uses the diving operation capacity of the semi-submersible barge to provide buoyancy for the jacket, can reduce the hoisting weight and the height of the gravity center of the jacket, uses the crane ship to lift and launch the jacket, and reduces the capacity requirement of the installation ship.

Description

Technical Field

[0001] This invention relates to the field of jacket installation technology, and more specifically, to a method for horizontal launching and installation of jackets using a combination of a semi-submersible barge and a crane vessel. Background Technology

[0002] Deep waters hold abundant oil and gas resources, making offshore oil and gas a key area for increasing reserves and production in my country. my country's exploitable deep-sea wind power resources exceed 2 billion kilowatts, a crucial pathway to achieving the "3060" target. As offshore oil and gas and offshore wind power develop towards deeper waters, offshore oil and gas platforms and offshore wind power booster stations are becoming increasingly larger, leading to a corresponding increase in the size and weight of jacket structures. Due to limitations in installation resources, the difficulty and cost of installing deep-water and large jacket structures at sea are rising.

[0003] Traditional methods for installing jacket structures often involve using crane vessels for hoisting or launching barges for horizontal sliding. Large jacket structures are large in size and weight, often exceeding the hoisting capacity of crane vessels or the overall stability and load-adjusting capacity of launching barges; or, due to the large size and weight of the jacket structures, there are fewer crane vessels or launching barges available on the market, resulting in high installation costs. Summary of the Invention

[0004] In view of this, the present invention proposes a method for horizontal launching and installation of jacket structures using a combination of a semi-submersible barge and a crane vessel, aiming to solve the problems of high difficulty and cost in the current offshore installation of deep-water and large jacket structures.

[0005] This invention proposes a method for the horizontal launching and installation of a jacket structure using a semi-submersible barge and a crane vessel. The method includes the following steps: Step S1, horizontally mounting the jacket structure on the semi-submersible barge and securing it with lashing devices, and controlling the semi-submersible barge to transport the jacket structure to the target sea area; Step S2, according to the installation position of the jacket structure, controlling the crane vessel and the semi-submersible barge to the pre-launching and installation position, and maintaining a preset safe distance between the crane vessel and the positioned semi-submersible barge; Step S3, attaching lifting slings to the crane vessel and the jacket structure, and adjusting the slings to a state of slight stress; Step S4, removing the lashing devices between the jacket structure and the semi-submersible barge; Step S5: Control the semi-submersible barge to submerge to the preset depth; Step S6: Control the crane vessel to lift the jacket structure, separating the jacket structure from the semi-submersible barge until a gap greater than or equal to the preset safety gap is maintained between the jacket structure and the semi-submersible barge, so that the jacket structure can be suspended on the water surface under the action of the lifting force and the buoyancy of the jacket structure; Step S7: Control the semi-submersible barge to leave the work area; Step S8: Control the crane vessel to lift the jacket structure, and gradually lower the jacket structure until it is lowered to the preset position, controlling the jacket structure to be in a free-floating state; Step S9: Fill the jacket structure with water to right it; Step S10: Install the jacket structure in place on the seabed.

[0006] Furthermore, in the above-mentioned method for horizontally launching and installing the jacket structure using a combination of a semi-submersible barge and a crane vessel, in step S9, the legs of the jacket structure away from the water surface are first slowly filled with water, and the jacket structure is flipped during the water filling process so that it is flipped to a vertical position; after the jacket structure is flipped, the other legs of the jacket structure are filled with water, and it is lowered while filling with water.

[0007] Furthermore, in the above-mentioned method of horizontal launching and installation of the jacket structure by combining a semi-submersible barge and a crane vessel, the crane vessel is controlled to assist the jacket structure in tilting during the tilting process.

[0008] Furthermore, in the above-mentioned method for horizontal launching and installation of the jacket structure using a combination of a semi-submersible barge and a crane vessel, after the jacket structure is positioned and installed on the seabed, the lifting slings are removed, and the jacket structure is then installed and secured.

[0009] Furthermore, in the above-mentioned method for horizontally launching and installing the jacket structure using a combination of a semi-submersible barge and a crane vessel, the preset safety clearance is 1m.

[0010] Furthermore, the above-mentioned method for horizontally launching and installing the jacket structure using a semi-submersible barge and crane vessel, before horizontally installing the jacket structure on the semi-submersible barge and securing it with lashing devices, further includes the following steps: Step S11, determining whether it is necessary to install buoys on the jacket structure; if so, installing buoys on the jacket structure. After the jacket structure is positioned and installed on the seabed, the method further includes the following steps: Step S12, removing the buoys after the jacket structure is positioned and installed on the seabed.

[0011] Furthermore, the above-mentioned method for horizontal launching and installation of the jacket structure using a combination of a semi-submersible barge and a crane vessel determines whether or not pontoons need to be installed on the jacket structure based on the lifting weight of the crane vessel, the weight of the jacket structure, and the buoyancy of the jacket structure.

[0012] Furthermore, the above-mentioned method for horizontally launching and installing the jacket structure using a combination of a semi-submersible barge and a crane vessel includes the following steps before launching and installing: Step S13, determining whether the current environmental conditions meet the environmental conditions for jacket structure construction and the environmental conditions for vessel construction. If they do, construction can proceed.

[0013] Furthermore, the above-mentioned method for horizontal launching and installation of the jacket structure using a combination of a semi-submersible barge and a crane vessel determines the construction environment conditions of the jacket structure based on the lateral environmental forces acting on the jacket structure during the submersible barge's submersion process; and determines the construction environment conditions of the vessel based on the movement of the semi-submersible barge in a windy and wavey environment.

[0014] Furthermore, in the above-mentioned method for horizontally launching and installing the jacket structure using a combination of a semi-submersible barge and a crane vessel, the preset depth is determined based on the weight and buoyancy of the jacket structure and the stability of the vessel.

[0015] The present invention provides a method for the horizontal launching and installation of a jacket structure using a semi-submersible barge and a crane vessel. This method is applicable to the horizontal loading and transportation of jacket structures by ship. The jacket structure is transported to the target sea area by a semi-submersible barge. The semi-submersible barge and crane vessel are positioned according to the installation location of the jacket structure. The crane vessel and jacket structure are secured with lifting slings, and the lashings between the jacket structure and the barge are removed. The semi-submersible barge submerges to a preset depth, and the crane vessel lifts the jacket structure, separating it from the semi-submersible barge. The semi-submersible barge slowly moves out of the work area, and the crane vessel lowers the jacket structure to the predetermined position. The jacket structure is then filled with water for support. Installation is underway; this underwater installation method utilizes the submersible barge's ability to provide buoyancy to the jacket structure, reducing its underwater weight, especially its center of gravity, and mitigating the limitations of crane vessel operations. By using a crane vessel to lift and launch the jacket structure, the requirements on the installation vessel's capabilities are reduced, eliminating reliance on specialized jacket launching barges. This method solves the problems of high difficulty and cost in the current offshore installation of deep-water and large jacket structures, particularly addressing the limitations of existing installation vessel resources and operational capabilities.

[0016] Furthermore, adding pontoons to the jacket can further improve the buoyancy of the jacket structure and reduce the demand on the crane vessel's operational capabilities. Therefore, it is necessary to calculate and analyze the floating state and buoyancy of the jacket structure and pontoons. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 A flowchart illustrating the horizontal launching and installation method of a jacket structure using a semi-submersible barge and a crane vessel, as provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the semi-submersible barge transport jacket provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the semi-submersible barge and crane vessel in place according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the crane vessel and the jacket structure with the lifting slings attached, provided in an embodiment of the present invention.

[0022] Figure 5A schematic diagram of the structure for removing the lashing components between the jacket and the barge, provided in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of a submersible barge slowly descending to a preset depth, as provided in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure for separating the lifting jacket from the barge provided in an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure for launching a barge out of the work area, provided in an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of the slow lowering of the lifting guide frame of the crane vessel provided in an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure for filling the pile legs with water according to an embodiment of the present invention;

[0028] Figure 11 A schematic diagram of the crane vessel's lifting and positioning of the guide frame provided in an embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the structure of the crane vessel lowering the jacket to the seabed, provided in an embodiment of the present invention.

[0030] Figure 13 This is another flowchart of the method for horizontal launching and installation of a jacket structure using a semi-submersible barge and a crane vessel in conjunction with an embodiment of the present invention.

[0031] Figure 14 This is another flowchart illustrating the method for horizontal launching and installation of a jacket structure using a semi-submersible barge and a crane vessel, as provided in this embodiment of the invention. Detailed Implementation

[0032] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] See Figure 1This is a flowchart illustrating the horizontal launching and installation method of a jacket structure using a semi-submersible barge and crane vessel, as provided in an embodiment of the present invention. As shown in the figure, the horizontal launching and installation method of the jacket structure includes the following steps:

[0034] Step S1: The jacket is horizontally installed on the semi-submersible barge and secured with lashing devices, and the semi-submersible barge-borne jacket is transported to the target sea area.

[0035] Specifically, firstly, the jacket structure 1 is loaded onto the ship at the dock, horizontally installed on the semi-submersible barge 2, and secured with lashing devices; then, as... Figure 2 As shown, it is transported to the target sea area by semi-submersible barge 2.

[0036] Step S2: Based on the installation position of the jacket, control the crane vessel and semi-submersible barge to move to the pre-launching installation position, and maintain a preset safe distance between the crane vessel and the positioned semi-submersible barge.

[0037] Specifically, the semi-submersible barge 2 and crane vessel 3 can be positioned according to the installation location of the jacket structure 1, and the installation of the jacket structure 1 should be carried out during a suitable weather window. Figure 3 As shown, the semi-submersible barge 2 and the crane vessel 3 are positioned according to the installation location of the jacket structure and proceed to the pre-launching installation location. A preset safety distance is maintained between the crane vessel 3 and the semi-submersible barge 2 to ensure a certain safety distance. The preset safety distance can be determined according to the actual situation, and no limitation is made on it in this embodiment.

[0038] Step S3: Hang the lifting slings on the crane vessel and the jacket, and adjust the lifting slings to be under slight stress.

[0039] Specifically, such as Figure 4 As shown, the crane vessel 3 is attached to the jacket 1 with the lifting sling 4, and the lifting sling 4 is adjusted to be in a state of slight stress. The slight stress state can be determined according to the actual situation, for example, the force is less than or equal to the preset force, ensuring that the upper rope of the lifting sling 4 is in a state of tension.

[0040] Step S4: Remove the lashing between the jacket and the semi-submersible barge.

[0041] Specifically, using a cutting tool, cut the lashing fittings connecting the jacket 1 and the semi-submersible barge 2. For example... Figure 5 As shown, all the bindings are removed so that the catheter holder 1 can be lifted.

[0042] Step S5: Control the semi-submersible barge to descend to the preset depth.

[0043] Specifically, such as Figure 6As shown, the semi-submersible barge 2 is controlled to slowly descend to a preset depth. The descent depth of the semi-submersible barge, i.e. the preset depth, can be determined based on the weight and buoyancy of the jacket 1 and the ship's stability calculations.

[0044] Step S6: Control the crane vessel to lift the jacket structure, so that the jacket structure separates from the semi-submersible barge, until a gap greater than or equal to the preset safety gap is maintained between the jacket structure and the semi-submersible barge, so that the jacket structure can be suspended on the water surface under the action of the lifting force and the buoyancy of the jacket structure.

[0045] Specifically, such as Figure 7 As shown, the crane vessel 3 slowly lifts the jacket 1, separating the jacket 1 from the semi-submersible barge 2, so that a gap h greater than or equal to the preset safety gap is maintained between the jacket 1 and the semi-submersible barge 2. The preset safety gap can be 1 meter. That is to say, the jacket 1 should maintain a safety gap of at least 1 meter with the semi-submersible barge 2, which can ensure that the jacket 1 can be suspended on the water surface under the action of the lifting force and the buoyancy of the jacket 1.

[0046] Step S7: Control the semi-submersible barge to leave the work area.

[0047] Specifically, such as Figure 8 As shown, the semi-submersible barge 2 was started and slowly sailed out of the work area.

[0048] Step S8: Control the crane vessel to hoist the jacket structure, gradually lower the jacket structure until it reaches the preset position, and control the jacket structure to be in a free-floating state.

[0049] Specifically, such as Figure 9 As shown, the crane vessel 3 hoists the jacket frame 1 and slowly lowers it, with the jacket frame 1 in a free-floating state.

[0050] Step S9: Fill the guide frame with water and straighten it.

[0051] Specifically, such as Figure 10 As shown, the legs of the jacket structure 1 furthest from the water surface are first slowly filled with water. During the filling process, the jacket structure is rotated to a vertical position. The crane vessel 3 can be controlled to assist the jacket structure 1 in rotating to a vertical position. After the jacket structure 1 has been rotated, the other legs of the jacket structure 1 are filled with water and lowered while filling with water.

[0052] Step S10: Position and install the jacket onto the seabed.

[0053] Specifically, such as Figure 11 As shown, the jacket foundation 1 was filled with water to achieve the required stability on the seabed, and the crane vessel 3 lifted the jacket foundation 1 into precise position. Figure 12As shown, after positioning is completed, the crane vessel 3 lowers the jacket 1 to the seabed, removes the lifting slings 4, and the jacket 1 is launched and installed. The jacket 1 is then installed and secured.

[0054] See Figure 13 This is another flowchart illustrating the horizontal launching and installation method of the jacket structure using a semi-submersible barge and crane vessel, provided in this embodiment of the invention. As shown in the figure, the horizontal launching and installation method of the jacket structure includes the following steps:

[0055] Step S11: Determine whether it is necessary to install buoys on the jacket. If it is necessary to install buoys on the jacket, then install buoys on the jacket.

[0056] Specifically, first, based on the lifting weight of the crane vessel, the weight of the jacket, and the buoyancy of the jacket, it is determined whether pontoons need to be installed on the jacket. Then, if pontoons need to be installed on the jacket, they are installed.

[0057] Step S1: The jacket is horizontally installed on the semi-submersible barge and secured with lashing devices, and the semi-submersible barge-borne jacket is transported to the target sea area.

[0058] Step S2: Based on the installation position of the jacket, control the crane vessel and semi-submersible barge to move to the pre-launching installation position, and maintain a preset safe distance between the crane vessel and the positioned semi-submersible barge.

[0059] Step S3: Hang the lifting slings on the crane vessel and the jacket, and adjust the lifting slings to be under slight stress.

[0060] Step S4: Remove the lashing between the jacket and the semi-submersible barge.

[0061] Step S5: Control the semi-submersible barge to descend to the preset depth.

[0062] Step S6: Control the crane vessel to lift the jacket structure, so that the jacket structure separates from the semi-submersible barge, until a gap greater than or equal to the preset safety gap is maintained between the jacket structure and the semi-submersible barge, so that the jacket structure can be suspended on the water surface under the action of the lifting force and the buoyancy of the jacket structure.

[0063] Step S7: Control the semi-submersible barge to leave the work area.

[0064] Step S8: Control the crane vessel to hoist the jacket structure, gradually lower the jacket structure until it reaches the preset position, and control the jacket structure to be in a free-floating state.

[0065] Step S9: Fill the guide frame with water and straighten it.

[0066] Step S10: Position and install the jacket onto the seabed.

[0067] Step S12: After the jacket is installed on the seabed, the buoy is removed.

[0068] See Figure 14 This is another flowchart illustrating the horizontal launching and installation method of the jacket structure using a semi-submersible barge and crane vessel, provided in this embodiment of the invention. As shown in the figure, the horizontal launching and installation method of the jacket structure includes the following steps:

[0069] Step S13: Determine whether the current environmental conditions meet the environmental conditions for jacket construction and ship construction. If they do, proceed with the construction operation.

[0070] Specifically, the construction environment conditions for the jacket structure are determined based on the lateral environmental forces acting on the jacket structure during the semi-submersible barge's submersion. The vessel's construction environment conditions are determined based on the semi-submersible barge's motion in windy and wave conditions. Then, before construction, it is determined whether the current environmental conditions meet both the jacket structure and vessel construction environment conditions. If they do, construction proceeds; otherwise, it is cancelled. Calculating the vessel's motion in windy and wave conditions allows for the selection of appropriate vessel construction environment conditions, preventing collisions between the jacket structure and the semi-submersible barge. Calculating the lateral environmental forces acting on the jacket structure during the barge's submersion allows for the selection of suitable jacket structure construction environment conditions, preventing slippage.

[0071] Step S11: Determine whether it is necessary to install buoys on the jacket. If it is necessary to install buoys on the jacket, then install buoys on the jacket.

[0072] Step S1: The jacket is horizontally installed on the semi-submersible barge and secured with lashing devices, and the semi-submersible barge-borne jacket is transported to the target sea area.

[0073] Step S2: Based on the installation position of the jacket, control the crane vessel and semi-submersible barge to move to the pre-launching installation position, and maintain a preset safe distance between the crane vessel and the positioned semi-submersible barge.

[0074] Step S3: Hang the lifting slings on the crane vessel and the jacket, and adjust the lifting slings to be under slight stress.

[0075] Step S4: Remove the lashing between the jacket and the semi-submersible barge.

[0076] Step S5: Control the semi-submersible barge to descend to the preset depth.

[0077] Step S6: Control the crane vessel to lift the jacket structure, so that the jacket structure separates from the semi-submersible barge, until a gap greater than or equal to the preset safety gap is maintained between the jacket structure and the semi-submersible barge, so that the jacket structure can be suspended on the water surface under the action of the lifting force and the buoyancy of the jacket structure.

[0078] Step S7: Control the semi-submersible barge to leave the work area.

[0079] Step S8: Control the crane vessel to hoist the jacket structure, gradually lower the jacket structure until it reaches the preset position, and control the jacket structure to be in a free-floating state.

[0080] Step S9: Fill the guide frame with water and straighten it.

[0081] Step S10: Position and install the jacket onto the seabed.

[0082] Step S12: After the jacket is installed on the seabed, the buoy is removed.

[0083] In summary, the method for horizontally launching and installing a jacket structure using a semi-submersible barge and crane vessel provided in this embodiment is suitable for horizontally loading and transporting jacket structures onto ships. The jacket structure is transported to the target sea area by a semi-submersible barge. The semi-submersible barge and crane vessel are positioned according to the installation location of the jacket structure. The crane vessel and jacket structure are secured with lifting slings, and the lashings between the jacket structure and the barge are removed. The semi-submersible barge submerges to a preset depth, and the crane vessel lifts the jacket structure, separating it from the semi-submersible barge. The semi-submersible barge slowly moves out of the work area, and the crane vessel lowers the jacket structure to the predetermined position. The jacket structure is then filled with water and straightened, completing the installation process. This method of launching and installing jacket structures utilizes the submersible barge's ability to provide buoyancy, thereby reducing the underwater weight, especially the underwater weight and center of gravity, of the jacket structure. It also reduces the limitations of crane vessel operations, allowing the jacket structure to be lifted and launched by the crane vessel. This reduces the capacity requirements of the installation vessel, eliminates the reliance on specialized jacket launching barges, and lowers the cost of launching and installing jacket structures. It solves the problems of high difficulty and cost of offshore installation of deep-water and large jacket structures, especially addressing the limitations of existing installation vessel resources and operational capabilities.

[0084] Furthermore, adding pontoons to the jacket can further improve the buoyancy of the jacket structure and reduce the demand on the crane vessel's operational capabilities. Therefore, it is necessary to calculate and analyze the floating state and buoyancy of the jacket structure and pontoons.

[0085] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0086] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0087] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for horizontally launching and installing a jacketed structure using a combination of a semi-submersible barge and a crane vessel, characterized in that... Includes the following steps: Step S1: Horizontally install the jacket on the semi-submersible barge and secure it with lashing devices, and control the semi-submersible barge to transport the jacket to the target sea area. Step S2: According to the installation position of the jacket, control the crane ship and the semi-submersible barge to be carried to the pre-launching installation position, and control the crane ship and the semi-submersible barge to maintain a preset safe distance. Step S3: Hang the lifting slings on the crane vessel and the jacket frame, and adjust the lifting slings to be under slight stress. Step S4: Remove the lashing devices between the jacket and the semi-submersible barge; Step S5: Control the semi-submersible barge to descend to the preset depth; Step S6: Control the crane vessel to lift the jacket structure, so that the jacket structure separates from the semi-submersible barge, until a gap greater than or equal to the preset safety gap is maintained between the jacket structure and the semi-submersible barge, so that the jacket structure can be suspended on the water surface under the action of the lifting force and the buoyancy of the jacket structure. Step S7: Control the semi-submersible barge to leave the work area; Step S8: Control the crane vessel to lift the jacket structure, gradually lower the jacket structure until it reaches the preset position, and control the jacket structure to be in a free-floating state. Step S9: Fill the jacket with water and straighten it; Step S10: Position and install the jacket onto the seabed.

2. The method for horizontal launching and installation of the jacket structure using a semi-submersible barge and crane vessel in conjunction with claim 1, characterized in that, In step S9, the legs of the jacket that are away from the water surface are slowly filled with water, and the jacket is flipped over during the filling process so that it is in a vertical position. After the jacket is flipped over, the other legs of the jacket are filled with water and lowered down while filling with water.

3. The method for horizontal launching and installation of the jacket structure using a semi-submersible barge and crane vessel in conjunction with claim 2, characterized in that, When the jacket is being overturned, the crane vessel is controlled to assist the jacket in overturning the jacket 1.

4. The method for horizontal launching and installation of a jacket structure using a semi-submersible barge and crane vessel in conjunction with any one of claims 1 to 3, characterized in that, After the jacket is in place and installed on the seabed, the slings are removed and the jacket is installed and secured.

5. The method for horizontal launching and installation of the jacket structure using a semi-submersible barge and crane vessel in conjunction with claim 4, characterized in that, The preset safety gap is 1m.

6. The method for horizontal launching and installation of a jacket structure using a semi-submersible barge and crane vessel in conjunction with any one of claims 1 to 3, characterized in that... Before the horizontal installation of the guide frame on the semi-submersible barge and its securing with lashing devices, the following steps are also included: Step S11: Determine whether it is necessary to install buoys on the jacket. If it is necessary to install buoys on the jacket, then install buoys on the jacket. After the jacket is positioned and installed on the seabed, the following steps are also included: Step S12: After the jacket is installed on the seabed, the buoy is removed.

7. The method for horizontal launching and installation of the jacket structure using a semi-submersible barge and crane vessel in conjunction with claim 6, characterized in that, Based on the lifting weight of the crane vessel, the weight of the jacket, and the buoyancy of the jacket, determine whether it is necessary to install pontoons on the jacket.

8. The method for horizontal launching and installation of a jacket structure using a semi-submersible barge and crane vessel in conjunction with any one of claims 1 to 3, characterized in that, Before proceeding with the drainage installation, the following steps are also included: Step S13: Determine whether the current environmental conditions meet the environmental conditions for jacket construction and ship construction. If they do, proceed with the construction operation.

9. The method for horizontal launching and installation of the jacket structure using a semi-submersible barge and crane vessel in conjunction with claim 8, characterized in that, Based on the lateral environmental forces exerted on the jacket during the submersible barge's descent, the environmental conditions for jacket construction operations are determined. The environmental conditions for ship construction operations are determined by the movement of semi-submersible barges in windy and wave environments.

10. The method for horizontal launching and installation of a jacket structure using a semi-submersible barge and crane vessel in conjunction with any one of claims 1 to 3, characterized in that, The preset depth is determined based on the weight and buoyancy of the jacket and the ship's stability calculations.

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