Mooring method suitable for cylindrical FPSO (Floating Production Storage and Offloading) wharf containing sawtooth-shaped damping plate

Abstract

The invention discloses a mooring method suitable for a cylindrical FPSO (Floating Production Storage and Offloading) wharf containing a sawtooth-shaped damping plate. The mooring method suitable for the cylindrical FPSO wharf containing the sawtooth-shaped damping plate comprises the following steps: S1, designing and prefabricating an isolation barge; s2, arranging a corresponding number of mooring points on the isolation barge; s3, arranging a corresponding number of rubber fenders; s4, hanging a mooring short cable on a mooring point outside the cylinder body in advance; s5, marking a matching position and a cable connecting position; s6, the cylindrical FPSO containing the sawtooth-shaped damping plate and the isolation barge form a whole; s7, two winches are arranged on the mooring wharf; s8, the whole is pulled to a wharf mooring position through a winch; and S9, one end of the mooring rope is connected with a mooring short cable pre-hung on the ship body, and the other end of the mooring rope is connected with a mooring bollard on the mooring wharf. According to the mooring method suitable for the cylindrical FPSO wharf containing the sawtooth-shaped damping plate, the mooring difficulty of the cylindrical FPSO containing the sawtooth-shaped damping plate is reduced, and the stability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of marine floating platform construction, and in particular relates to a mooring method for a cylindrical FPSO dock containing a sawtooth damping plate. Background Art

[0002] As a floating platform for offshore oil and gas exploitation, cylindrical FPSO is mainly composed of a large-sized hull and damping plates. Compared with traditional ship-type FPSO, it is widely used in development due to its unique isotropy, low sensitivity to offshore waves, and the ability to connect more risers and cables.

[0003] In the prior art, when ship-type FPSOs and semi-submersible platforms are moored at the dock, they are usually fixed directly to the dock mooring piles with cables. However, due to the special shape of the cylindrical FPSO, the dock mooring method of the traditional hull and platform is easy to cause its mooring to be unstable, resulting in rolling along the dock. A large number of sacrificial anodes, mooring eye plates and LUG tubes are welded on the outside of the cylindrical FPSO cylinder. Once rolling occurs, it is easy to cause strength damage and deformation to the main body and auxiliary structures of the cylindrical FPSO. In particular, the cylindrical FPSO with a serrated damping plate has a maximum diameter at the bottom serrated damping plate. When moored, on the one hand, it is hidden below the sea level, and the distance between it and the dock is difficult to observe and easy to collide; on the other hand, its special shape is easy to contact and collide with the isolation barge, resulting in increased difficulty in mooring the cylindrical FPSO with a serrated damping plate.

[0004] Therefore, it is urgent to design a mooring method suitable for a cylindrical FPSO pier with a sawtooth damping plate to solve the above-mentioned problem of difficulty in mooring a cylindrical FPSO with a sawtooth damping plate. Summary of the invention

[0005] In order to solve the technical problem mentioned in the background technology that the cylindrical FPSO with a sawtooth damping plate is difficult to moor, a mooring method suitable for a cylindrical FPSO with a sawtooth damping plate is provided to solve the above problem.

[0006] To achieve the above-mentioned purpose, the specific technical solution of the mooring method of the cylindrical FPSO wharf with a sawtooth damping plate of the present invention is as follows: A mooring method for a cylindrical FPSO pier with a sawtooth damping plate comprises the following steps: S1. Design and prefabricate the isolation barge according to the outer diameter of the cylindrical FPSO with the sawtooth damping plate, the position of the sawtooth damping plate, the mooring draft of the ship and the installation structure; S2. Determine the mooring angle of the cylindrical FPSO with a sawtooth damping plate according to the arrangement of the mooring bollards at the pier and the position of the mooring point of the cylindrical FPSO with a sawtooth damping plate, and arrange a corresponding number of mooring points on the isolation barge; S3. Arrange a corresponding number of rubber fenders on the arc supports and fender brackets on the left and right sides of the isolation barge; S4. Pre-hang the mooring short line on the mooring point outside the cylindrical FPSO cylinder with the sawtooth damping plate; S5. Mark the fitting position of the isolation barge and the hull plate and the cable connection position between the two on the hull plate of the cylindrical FPSO with the sawtooth damping plate during berthing; S6. The cylindrical FPSO with the sawtooth damping plate is safely controlled in a floating stable state by three tugboats, and the isolation barge is towed to the berthing side of the cylindrical FPSO with the sawtooth damping plate by another tugboat. After the cylindrical FPSO with the sawtooth damping plate contacts the isolation barge, one end of the mooring short cable pre-placed on the water surface is connected to the mooring point set on the isolation barge by a cable, so that the cylindrical FPSO with the sawtooth damping plate and the isolation barge form a whole; S7. Two winches are arranged on the mooring pier to tow the cylindrical FPSO with the sawtooth damping plate and the isolation barge as a whole; S8. After the cylindrical FPSO with the sawtooth damping plate and the isolation barge are stabilized, the cable drawn out from the winch is connected with the pre-hanged mooring short cable on the cylindrical FPSO with the sawtooth damping plate by a cable boat, and the cylindrical FPSO with the sawtooth damping plate and the isolation barge are towed as a whole to the dock mooring position by the winch; S9. Use a cable boat to connect one end of the cable to the pre-hung short mooring cable on the cylindrical FPSO with the sawtooth damping plate, and the other end to the mooring bollard on the mooring dock.

[0007] Furthermore, the cylindrical FPSO with a zigzag damping plate has an outer diameter of 72m, an outer diameter of 94m for the damping plate, and a draft of 8.1m for the mooring.

[0008] Furthermore, the truss support structure of the isolation barge is provided with an arc support on the starboard side of the ship, and a rubber fender is provided on the arc support, and 14 fender brackets are provided on the port side of the dock.

[0009] Furthermore, the geometric dimensions of the isolation barge are 40m*10.5m*3m; the total length of the support is 36.6m, the total width of the fender support is 7.75m, the fender support includes a left fender support and a starboard arc support, and the total weight of the left fender support and the starboard arc support is 230T.

[0010] Furthermore, when the cylindrical FPSO with a zigzag damping plate is moored at a pier with a draft of 8.1 m, the mooring eye plate and the LUG pipe welded at the same height on the outside of the cylinder are both in the gap of the arc support on the starboard side of the isolation barge.

[0011] Furthermore, when the cylindrical FPSO with the sawtooth damping plate is moored to the isolation barge at the dock, a total of 11 cables are designed to be tied to the mooring piles, and the 11 cables are symmetrically distributed on both sides of the center of the cylindrical FPSO with the sawtooth damping plate.

[0012] Furthermore, when the cylindrical FPSO with the sawtooth damping plate is moored at the dock, the 11 cable anchor points of the cylinder include the mooring eye plate and the LUG tube.

[0013] Furthermore, the mooring eye plate on the outer side of the cylindrical FPSO shell with a zigzag damping plate is folded and connected to the mooring short cable through a 200t shackle, and the mooring short cable is folded and then connected to the cable through a 55t shackle.

[0014] Furthermore, the LUG pipe on the outer side of the cylindrical FPSO shell containing the zigzag damping plate is directly folded and connected to the mooring short cable, and the mooring short cable is folded and then connected to the cable through a 55t shackle.

[0015] Furthermore, the cable material used for mooring the cylindrical FPSO with a zigzag damping plate at the dock is high-strength polyethylene fiber with a breaking force of 2470kN and a diameter of 60mm.

[0016] The mooring method of the cylindrical FPSO wharf with a sawtooth damping plate of the present invention has the following advantages: Fastening the cylindrical FPSO with sawtooth damping plate to the dock effectively overcomes the technical problem of the cylindrical structure rolling easily when moored at the dock, and solves the mooring stability and easy collision of the cylindrical FPSO with sawtooth damping plate with the dock, and further ensures the safe distance between the sawtooth damping plate and the dock, which is convenient for subsequent tilting test, lifeboat throwing test, large cabin strength test, etc. Moreover, according to the draft requirements, the installation position and height of the isolation barge can avoid the structure installed outside the cylinder of the cylindrical FPSO with sawtooth damping plate, thereby reducing the strength damage and deformation of the cylindrical FPSO with sawtooth damping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of the mooring method of the cylindrical FPSO wharf with a sawtooth damping plate applicable to the present invention; Figure 2 It is a side view of a cylindrical FPSO with a sawtooth damping plate according to the present invention; Figure 3 A top view of a cylindrical FPSO with a sawtooth damping plate according to the present invention; Figure 4 It is a structural schematic diagram of the isolation barge of the present invention; Figure 5 It is a schematic diagram of the short cable connection of the mooring eye plate of the present invention; Figure 6 This is a schematic diagram of the short cable connection of the LUG tube of the present invention; Figure 7 A side view of a tugboat towing an isolation barge to a cylindrical FPSO mooring with a sawtooth damping plate according to the present invention; Figure 8 It is a schematic diagram of the cable connection between the cylindrical FPSO with a sawtooth damping plate and the isolation barge of the present invention; Fig. 9 It is a schematic diagram of the cable connection between the cylindrical FPSO with a sawtooth damping plate and the dock mooring pile of the present invention; Fig.10 It is a schematic structural diagram of the relationship between the cylindrical FPSO with a sawtooth damping plate, the isolation barge and the mooring wharf of the present invention.

[0018] Description of the markings in the figure: 1. Cylindrical FPSO with sawtooth damping plate; 2. Cylinder; 3. Sawtooth damping plate; 4. Mooring eye plate; 5. Sacrificial anode; 6. LUG tube; 7. Isolation barge; 8. Mooring bollard; 9. Mooring angle; 10. Arc support; 11. Fender bracket; 12. Rubber fender; 13. Mooring short line; 14. Hull plate; 15. Tugboat; 16. Winch; 17. Cable; 18. Cable boat; 19. Truss support structure; 20. Bridge hull floating structure; 21. Mooring dock. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Fig.10The mooring method of the present invention applicable to a cylindrical FPSO pier with a zigzag damping plate is described.

[0022] As a floating platform for offshore oil and gas exploitation, cylindrical FPSO is mainly composed of a large-sized hull and a damping plate. Compared with traditional ship-type FPSO, it is widely used in development due to its unique isotropy, low sensitivity to offshore wind and waves, and the ability to connect more risers and cables. After the hull of the cylindrical FPSO is undocking, it is necessary to carry out tilting tests, lifeboat throwing tests, large cabin strength tests, etc. at the dock. Although the dock mooring of ship-type FPSO has been widely studied and practiced, it is limited by its special cylindrical structure with a serrated damping plate 3, which makes the traditional dock mooring scheme not suitable for cylindrical FPSO.

[0023] Given that there are only six cylindrical FPSOs in the world, research on their dock mooring is obviously insufficient. Therefore, it is particularly important to conduct research on the dock mooring of cylindrical FPSO1 with zigzag damping plates. The technical difficulties are mainly: 1) When the ship-type FPSO and semi-submersible platform are moored at the dock, they are usually directly fixed to the dock mooring pile 8 with cables 17. However, due to the special shape of the cylindrical FPSO, the dock mooring method of the traditional hull and platform is easy to cause its mooring to be unstable, resulting in rolling along the dock. The outer side of the cylindrical FPSO cylinder 2 is welded with a large number of sacrificial anodes 5, mooring eye plates 4 and LUG tubes 6. Once rolling occurs, it is easy to cause strength damage and deformation to the main body and auxiliary structures of the cylindrical FPSO. 2) The maximum diameter of the cylindrical FPSO1 with a sawtooth damping plate is at the bottom of the sawtooth damping plate 3. When moored, it is hidden below the sea level, and the distance between it and the dock is difficult to observe and easy to collide; on the other hand, its special shape is easy to contact and collide with the isolation barge 7, which makes the mooring of the cylindrical FPSO1 with a sawtooth damping plate more difficult. 3) The cylindrical FPSO1 with a sawtooth damping plate has a sacrificial anode 5, a mooring eye plate 4, and a LUG tube 6 welded on the outside of its cylinder 2, which limits the installation position of the isolation barge 7 when it is fixed on the outside of the cylinder 2 of the cylindrical FPSO1 with a sawtooth damping plate, thereby further increasing the difficulty of installing the isolation barge 7.

[0024] Therefore, it is urgent to design a mooring method suitable for a cylindrical FPSO1 pier with a zigzag damping plate to solve the above-mentioned problems.

[0025] like Figure 1 As shown, the mooring method for a cylindrical FPSO1 pier with a sawtooth damping plate in the present invention comprises the following steps: S1. Design and prefabricate the isolation barge 7 according to the outer diameter of the cylindrical FPSO 1 with the sawtooth damping plate, the position of the sawtooth damping plate 3, the mooring draft of the ship and the position and size of the mooring eye plate 4, sacrificial anode 5 and LUG tube 6 installed by it; S2. Determine the mooring angle 9 of the cylindrical FPSO 1 with a sawtooth damping plate according to the arrangement of the pier mooring bollards 8 and the position of the mooring point of the cylindrical FPSO 1 with a sawtooth damping plate, and arrange a corresponding number of mooring points on the isolation barge 7; S3, arranging a corresponding number of rubber fenders 12 on the arc supports 10 and fender brackets 11 on the left and right sides of the isolation barge 7; S4, pre-hanging the mooring short line 13 on the mooring point outside the cylindrical FPSO 1 shell 2 with the sawtooth damping plate; S5. On the outer hull plate 14 of the cylindrical FPSO 1 with the sawtooth damping plate, mark in advance the fitting position of the isolation barge 7 and the outer hull plate 14 when berthing and the connection position of the cable 17 therebetween; S6. The cylindrical FPSO 1 with the sawtooth damping plate is safely controlled in a floating stable state by three tugboats 15, and then the isolation barge 7 is towed to the berthing side of the cylinder 2 of the cylindrical FPSO 1 with the sawtooth damping plate by another tugboat 15. After the cylindrical FPSO 1 with the sawtooth damping plate contacts the isolation barge 7, one end of the mooring short cable 13 pre-placed on the water surface is connected to the mooring point set on the isolation barge 7 by the cable 17, so that the cylindrical FPSO 1 with the sawtooth damping plate and the isolation barge 7 form a whole; S7. Arrange two winches 16 on the mooring pier 21 to tow the cylindrical FPSO 1 with the sawtooth damping plate and the isolation barge 7 as a whole; S8, after the cylindrical FPSO 1 with the sawtooth damping plate and the isolation barge 7 are stabilized, the cable 17 led out from the winch 16 is connected to the pre-hanged mooring short cable 13 on the cylindrical FPSO 1 with the sawtooth damping plate by the cable boat 18, and the cylindrical FPSO 1 with the sawtooth damping plate and the isolation barge 7 are towed as a whole to the dock mooring position by the winch 16; S9. Use a cable boat 18 to connect one end of the cable 17 to the pre-hung mooring short cable 13 on the cylindrical FPSO with a sawtooth damping plate, and the other end to the mooring bollard 8 on the mooring dock 21.

[0026] The cylindrical FPSO 1 with sawtooth damping plate is fastened to the dock shore, which effectively overcomes the technical problem that the cylindrical structure is easy to roll when moored at the dock, and not only solves the mooring stability of the cylindrical FPSO 1 with sawtooth damping plate and the problem of easy collision with the dock, but also further ensures the safe distance between the sawtooth damping plate 3 and the dock, which is convenient for subsequent tilting test, lifeboat throwing test, large cabin strength test, etc. Moreover, according to the draft requirements, the installation position and height of the isolation barge 7 can avoid the structure installed outside the cylinder 2 of the cylindrical FPSO 1 with sawtooth damping plate, thereby reducing the strength damage and deformation of the cylindrical FPSO 1 with sawtooth damping plate.

[0027] Further, if Figure 2 and Figure 3 As shown, the outer diameter of the cylinder 2 of the cylindrical FPSO 1 with a zigzag damping plate is 72m, the outer diameter of the damping plate is 94m, and the draft of the mooring is 8.1m.

[0028] Further, if Figure 4 As shown, the isolation barge 7 is composed of a truss support structure 19 and a bridge hull floating structure 20. The truss support structure 19 of the isolation barge 7 is provided with an arc support 10 on the starboard side of the ship, and a rubber fender 12 is provided on the arc support 10 to contact the cylindrical FPSO 1 with a serrated damping plate. Fourteen fender brackets 11 are provided on the port side of the dock, and the fender brackets 11 are installed with rubber fenders 12 for contacting the dock.

[0029] Further, if Figure 4 , Figure 8 and Fig.10 As shown, the geometric dimensions of the isolation barge 7 are 40m*10.5m*3m; the total length and width of the arc support 10 are 36.6m*7.75m, and the fender support 11 includes a left fender support and a starboard arc support 10, and the total weight of the left fender support and the starboard arc support 10 is 230T.

[0030] Further, if Figures 4 to 10 As shown, when the cylindrical FPSO 1 with a sawtooth damping plate is moored at a dock with a draft of 8.1 m, the mooring eye plate 4 and the LUG pipe 6 welded at the same height on the outside of the cylinder 2 are both in the gap of the arc support 10 on the starboard side of the isolation barge 7, thereby eliminating mutual interference between the structures.

[0031] Further, if Fig.10 As shown, the mooring point of the mooring short line 13 outside the cylindrical FPSO 1 shell 2 with a sawtooth damping plate includes a mooring eye plate 4 and a LUG tube 6, and the mooring short line 13 is marked in advance after being hung to facilitate distinguishing its connection position with the isolation barge 7, the mooring bollard 8 and the winch 16.

[0032] Further, if Figures 4 to 10 As shown, when the mooring short line 13 is pre-hung on the outside of the cylindrical FPSO1 cylinder 2 with a sawtooth damping plate, one end of the mooring short line 13 after being folded in half is first connected to the mooring eye plate 4 on the outside of the cylindrical FPSO1 cylinder 2 with a sawtooth damping plate through a 200t shackle, and the other end is placed on the water surface. After one end of the cable 17 is tied to the mooring bollard 8 of the dock, the other end of the cable 17 is connected to the mooring short line 13 through a 55t shackle by a cable boat 18.

[0033] Further, if Figures 4 to 10 As shown, when the mooring short line 13 is pre-hung on the outside of the cylindrical FPSO1 cylinder 2 with a zigzag damping plate, one end of the mooring short line 13 after being folded in half is first connected to the LUG pipe 6 on the outside of the cylindrical FPSO1 cylinder 2 with a zigzag damping plate, and the other end is placed on the water surface; after one end of the cable 17 is tied to the mooring bollard 8 at the dock, the other end of the cable 17 is connected to the mooring short line 13 by a cable boat 18 through a 55t shackle.

[0034] Further, if Figures 4 to 10 As shown, the three tugboats 15 are connected to the isolation barge 7 by a cable 17, one end of the cable 17 is connected to the mooring short cable 13 by a cable boat 18, and the other end is connected to the three tugboats 15, and one of the tugboats 15 is connected to the mooring short cable 13 by an eight-shaped cable to facilitate better control and adjustment of the state of the cylindrical FPSO 1 with the zigzag damping plate.

[0035] Further, if Figures 4 to 10 As shown, when the cylindrical FPSO 1 with a sawtooth damping plate is moored with the isolation barge 7 at the dock, a total of 11 cables 17 are designed to be tied to the mooring bollard 8, and the 11 cables 17 are symmetrically distributed on both sides of the center of the cylindrical FPSO 1 with a sawtooth damping plate. When the cylindrical FPSO 1 with a sawtooth damping plate is moored at the dock, the anchor points of the 11 cables 17 of the cylinder 2 include the mooring eye plate 4 and the LUG pipe 6.

[0036] Further, if Figures 6 to 10 As shown, the cable 17 used for mooring the cylindrical FPSO 1 with a zigzag damping plate at the dock is made of high-strength polyethylene fiber with a breaking force of 2470 kN and a diameter of 60 mm.

[0037] By adopting the dock mooring method for the cylindrical FPSO 1 with a sawtooth damping plate of the present invention, the cylindrical FPSO 1 with a sawtooth damping plate can be fastened to the dock shore, effectively overcoming the technical problem that the cylindrical structure is easy to roll when moored at the dock, and solving the mooring stability of the cylindrical FPSO 1 with a sawtooth damping plate and the problem of easy collision with the dock, and further ensuring the safe distance between the sawtooth damping plate 3 and the dock, it is convenient for it to carry out subsequent tilting tests, lifeboat throwing tests, large cabin strength tests and other construction. Moreover, according to its draft requirements, the installation position and height of the designed isolation barge 7 can cleverly avoid the mooring eye plate 4, LUG tube 6, sacrificial anode 5 and other structures installed outside the cylinder 2 of the cylindrical FPSO 1 with a sawtooth damping plate, so that the strength damage and deformation of the cylindrical FPSO 1 with a sawtooth damping plate are guaranteed.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A mooring method for a cylindrical FPSO pier with a sawtooth damping plate, characterized in that: The following steps are involved: S1. Design and prefabricate the isolation barge according to the outer diameter of the cylindrical FPSO with the sawtooth damping plate, the position of the sawtooth damping plate, the mooring draft of the ship and the installation structure; S2. Determine the mooring angle of the cylindrical FPSO with a sawtooth damping plate according to the arrangement of the mooring bollards at the pier and the position of the mooring point of the cylindrical FPSO with a sawtooth damping plate, and arrange a corresponding number of mooring points on the isolation barge; S3. Arrange a corresponding number of rubber fenders on the arc supports and fender brackets on the left and right sides of the isolation barge; S4. Pre-hang the mooring short line on the mooring point outside the cylindrical FPSO cylinder with the sawtooth damping plate; S5. Mark the fitting position of the isolation barge and the hull plate and the cable connection position between the two on the hull plate of the cylindrical FPSO with the sawtooth damping plate during berthing; S6. The cylindrical FPSO with the sawtooth damping plate is safely controlled in a floating stable state by three tugboats, and the isolation barge is towed to the berthing side of the cylindrical FPSO with the sawtooth damping plate by another tugboat. After the cylindrical FPSO with the sawtooth damping plate contacts the isolation barge, one end of the mooring short cable pre-placed on the water surface is connected to the mooring point set on the isolation barge by a cable, so that the cylindrical FPSO with the sawtooth damping plate and the isolation barge form a whole; S7. Two winches are arranged on the mooring pier to tow the cylindrical FPSO with the sawtooth damping plate and the isolation barge as a whole; S8. After the cylindrical FPSO with the sawtooth damping plate and the isolation barge are stabilized, the cable drawn out from the winch is connected with the pre-hanged mooring short cable on the cylindrical FPSO with the sawtooth damping plate by a cable boat, and the cylindrical FPSO with the sawtooth damping plate and the isolation barge are towed as a whole to the dock mooring position by the winch; S9. Use a cable boat to connect one end of the cable to the pre-hung short mooring cable on the cylindrical FPSO with the sawtooth damping plate, and the other end to the mooring bollard on the mooring dock.

2. The mooring method for a cylindrical FPSO dock with a sawtooth damping plate according to claim 1, characterized in that: The outer diameter of the cylindrical FPSO with a zigzag damping plate is 72m, the outer diameter of the damping plate is 94m, and the draft of the mooring is 8.1m.

3. The mooring method for a cylindrical FPSO dock with a sawtooth damping plate according to claim 1, characterized in that: The truss support structure of the isolation barge is provided with an arc support on the starboard side of the ship, on which a rubber fender is provided, and 14 fender brackets are provided on the port side close to the dock.

4. The mooring method for a cylindrical FPSO dock with a sawtooth damping plate according to claim 3, characterized in that: The geometric dimensions of the isolation barge are 40m*10.5m*3m; the total length of the support is 36.6m, the total width of the fender support is 7.75m, and the fender support includes the left fender support and the starboard arc support. The total weight of the left fender support and the starboard arc support is 230T.

5. The mooring method for a cylindrical FPSO dock with a sawtooth damping plate according to claim 4, characterized in that: When the cylindrical FPSO with a sawtooth damping plate is moored at the dock with a draft of 8.1m, the mooring eye plate and LUG pipe welded at the same height on the outside of the cylinder are both in the gap of the arc support on the starboard side of the isolation barge.

6. The mooring method for a cylindrical FPSO dock with a sawtooth damping plate according to claim 1, characterized in that: When the cylindrical FPSO with a sawtooth damping plate is moored to the isolation barge at the dock, a total of 11 cables are designed to be tied to the mooring piles, and the 11 cables are symmetrically distributed on both sides of the center of the cylindrical FPSO with a sawtooth damping plate.

7. The mooring method for a cylindrical FPSO pier with a sawtooth damping plate according to claim 6, characterized in that: When the cylindrical FPSO with a zigzag damping plate is moored at the dock, the 11 cable anchor points of the cylinder include the mooring eye plate and the LUG tube.

8. The mooring method for a cylindrical FPSO pier with a sawtooth damping plate according to claim 5, characterized in that: The mooring eye plate on the outer side of the cylindrical FPSO shell with a zigzag damping plate is folded and connected to the mooring short cable through a 200t shackle. The mooring short cable is folded in half and then connected to the cable through a 55t shackle.

9. The mooring method for a cylindrical FPSO pier with a sawtooth damping plate according to claim 5, characterized in that: The LUG pipe on the outer side of the cylindrical FPSO shell with a zigzag damping plate is directly connected to the mooring short cable by folding it in half. The mooring short cable is folded in half and then connected to the cable through a 55t shackle.

10. The mooring method for a cylindrical FPSO pier with a sawtooth damping plate according to claim 1, characterized in that: The cable used for mooring the cylindrical FPSO with serrated damping plates at the dock is made of high-strength polyethylene fiber with a breaking force of 2470kN and a diameter of 60mm.

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