Cylindrical FPSO dynamic pipe cable emergency suspension device and suspension method thereof

Abstract

The invention discloses a cylindrical FPSO dynamic pipe cable emergency suspension device and a suspension method thereof.The cylindrical FPSO dynamic pipe cable emergency suspension device comprises a suspension beam, the suspension beam is connected to a ship body, the side, away from the ship body, of the suspension beam is connected to a first protection pipe, the suspension beam is connected with a suspension rigging, and the suspension rigging is arranged in the first protection pipe in a penetrating mode; the suspension rigging extends out of one end of the first protection pipe and is connected with the end of the pipe cable, so that the pipe cable is suspended on the suspension rigging. According to the cylindrical FPSO dynamic pipe cable emergency suspension device provided by the invention, the suspension rigging is additionally arranged in the first protection pipe, so that the dynamic pipe cable is emergently suspended; the suspension beam is formed by splicing three pieces of I-shaped steel, a lifting lug is welded to the center of the bottom face of the suspension beam, the suspension beam is fixed to a first protection pipe opening, and after fixing is completed, a set of suspension rigging is connected and put down in advance to temporarily suspend the tail end of the dynamic cable under the emergency condition. If an emergency situation occurs and a diver cannot work, the tail end of the dynamic cable is temporarily hung on the hanging rigging reserved on the first protection pipe, and pipe cable hanging is achieved.

Description

Technical Field

[0001] This invention belongs to the field of marine oil engineering technology, and particularly relates to a cylindrical FPSO dynamic cable emergency suspension device and its suspension method. Background Technology

[0002] Traditional FPSOs (Floating Production Storage and Offloading vessels) typically employ single-point mooring systems to maintain stability. Cylindrical FPSOs, due to their symmetrical geometry, are less sensitive to wind, waves, and currents, allowing for the use of more economical multi-point mooring systems. When pulling the end of the dynamic cable through the liner, divers are required to unlock the bend preventer.

[0003] In case of an emergency, a single-point moored FPSO can temporarily suspend the cable on the anchor chain, while a cylindrical FPSO uses multi-point mooring, with the anchor chain located far from the cable conduit opening, making it impossible to suspend the cable in an emergency.

[0004] Therefore, there is an urgent need to design a cylindrical FPSO dynamic cable emergency suspension device to solve the above-mentioned problems. Summary of the Invention

[0005] To address the technical problem mentioned in the background art of multi-point mooring of cylindrical FPSOs with anchor chains far from the cable conduit opening, making it impossible to suspend the cables in emergency situations, a dynamic cable emergency suspension device for cylindrical FPSOs is provided to solve the problem of suspending the dynamic cable of cylindrical FPSOs in emergency situations.

[0006] To achieve the above objectives, the specific technical solution of the cylindrical FPSO dynamic cable emergency suspension device of the present invention is as follows: A cylindrical FPSO dynamic cable emergency suspension device includes a suspension beam connected to the hull, with the side of the suspension beam away from the hull connected to a first protective tube. A suspension rigging is connected to the suspension beam, and the suspension rigging extends through the first protective tube. One end of the suspension rigging extends out of the first protective tube and connects to the end of the cable, so that the cable is suspended on the suspension rigging.

[0007] Furthermore, the suspension beam includes a first I-beam, a second I-beam, and a third I-beam, with the second and third I-beams symmetrically connected to the first I-beam.

[0008] Furthermore, a lifting lug is connected along the length of the first I-beam, and a suspension rigging is connected to the lifting lug.

[0009] Furthermore, limit blocks are connected to the first, second, and third I-beams, and the inner wall of the first protective tube abuts against the limit blocks.

[0010] Furthermore, the end of the suspension sling away from the lug passes through the first protective tube and is connected to the shackle at the end of the cable via a hook.

[0011] Furthermore, the cable end is connected to the winch passing through the second protective pipe, and the end of the cable away from the cable end is connected to the anti-bend flange.

[0012] Furthermore, the hooks of the suspension rigging are connected to the rings by an underwater robot.

[0013] An emergency suspension method for dynamic cable of a cylindrical FPSO mainly includes the following steps.

[0014] S1. Connect the suspension beam to the first protective pipe and connect the suspension rigging to the first I-beam of the suspension beam; S2. The suspension rigging passes through one end of the first protective pipe and is connected to the end of the cable via a hook. S3. The winch lowers the cable to transfer the weight of the cable to the suspension rigging; S4. Once the tension of the cable has been completely transferred from the winch to the suspension rigging, the underwater robot disconnects the winch from the cable end underwater. S5, Recovery winch.

[0015] The cylindrical FPSO dynamic cable emergency suspension device and its suspension method of the present invention have the following advantages: By adding a suspension rigging inside the first protective pipe, the dynamic cable can be suspended in an emergency. The suspension beam is composed of three H-beams spliced ​​together, with a lifting lug welded to the center of the bottom surface. It is fixed at the opening of the first protective pipe. After fixing, a set of suspension rigging is connected and pre-lowered for temporary suspension of the end of the dynamic cable in emergency situations. This application pre-reserves lifting rings in the first protective pipe as emergency suspension points, with the anti-bend device unlocking as the node. In case of an emergency, when divers are unable to work, the end of the dynamic cable can be temporarily suspended on the pre-reserved suspension rigging in the first protective pipe to ensure cable suspension in emergency situations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the suspension beam of the cylindrical FPSO dynamic cable emergency suspension device of the present invention; Figure 2 This is a schematic diagram showing the positions of the first and second protective pipes of the cylindrical FPSO dynamic cable emergency suspension device of the present invention. Figure 3 This is a schematic diagram of the suspension rigging connection of the cylindrical FPSO dynamic cable emergency suspension device of the present invention; Figure 4 This is a schematic diagram of the suspension cable of the cylindrical FPSO dynamic cable emergency suspension device of the present invention.

[0017] Explanation of markings in the diagram: 1. Suspension beam; 11. First I-beam; 12. Second I-beam; 13. Third I-beam; 2. Hull; 3. First protective pipe; 4. Second protective pipe; 5. Suspension rigging; 6. Cable; 7. Cable end; 8. Lifting lug; 9. Limiting block; 10. Winch; 11. Anti-bend flange; 12. Underwater robot; 13. Bottom protective pipe flange. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0020] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a cylindrical FPSO dynamic cable emergency suspension device.

[0021] like Figure 1 As shown, the cylindrical FPSO dynamic cable emergency suspension device of the present invention includes a suspension beam 1, which is connected to the hull 2. The side of the suspension beam 1 away from the hull 2 ​​is connected to the first protective tube 3. A suspension sling 5 is connected to the suspension beam 1. The suspension sling 5 is installed inside the first protective tube 3. One end of the suspension sling 5 extends out of the first protective tube 3 and is connected to the cable end 7 so that the cable 6 is suspended on the suspension sling 5.

[0022] By adding a suspension sling 5 inside the first protective pipe 3, the dynamic cable 6 can be suspended in an emergency. The suspension beam 1 is composed of three I-beams spliced ​​together, with a lifting lug 8 welded to the center of the bottom surface and fixed at the opening of the first protective pipe 3. After fixing, a set of suspension slings is connected and pre-lowered for temporary suspension of the end of the dynamic cable in emergency situations. This application has reserved lifting rings in the first protective pipe 3 as emergency suspension points, with the anti-bend device unlocking as the node. In case of an emergency, when divers are unable to work, the end of the dynamic cable can be temporarily suspended on the reserved suspension sling 5 in the first protective pipe 3 to ensure the suspension of the cable 6 in emergency situations.

[0023] Furthermore, such as Figure 1As shown, the suspension beam 1 includes a first I-beam 11, a second I-beam 12, and a third I-beam 13. The second I-beam 12 and the third I-beam 13 are symmetrically connected to the first I-beam 11. A lifting lug 8 is connected along the length of the first I-beam 11, and a suspension rigging 5 is connected to the lifting lug 8. Limiting blocks 9 are connected to the first I-beam 11, the second I-beam 12, and the third I-beam 13, and the inner wall of the first protective tube 3 abuts against the limiting block 9.

[0024] In this embodiment, preferably, the suspension beam 1 is composed of a first I-beam 11, a second I-beam 12, and a third I-beam 13. The first I-beam 11, the second I-beam 12, and the third I-beam 13 are located on the same horizontal plane, and the second I-beam 12 and the third I-beam 13 are symmetrically welded to both sides of the first I-beam 11 so that the first I-beam 11, the second I-beam 12, and the third I-beam 13 are connected to form a fixed structure, which is fixedly connected to the hull 2.

[0025] A lifting lug 8 is welded to the lower side of the first I-beam 11, and the lifting lug 8 is arranged along the length of the first I-beam 11 so that when the suspension lock 5 is connected to the lifting lug 8, the tension on the lifting lug 8 is evenly applied to the first I-beam 11.

[0026] Preferably, limit blocks 9 are welded on the first I-beam 11, the second I-beam 12 and the third I-beam 13. The multiple limit blocks 9 are evenly distributed and form a circle so that the first protective tube 3 is stably engaged with the limit blocks 9.

[0027] Furthermore, such as Figures 2 to 4 As shown, the end of the suspension rigging 5 away from the lug 8 passes through the first protective pipe 3 and is connected to the lifting ring at the end of the cable 6 via a hook; the cable end 7 is connected to the winch 10 passing through the second protective pipe 4, and the end of the cable 6 away from the cable end 7 is connected to the anti-bend flange 11; the hook of the suspension rigging 5 is connected to the lifting ring by the underwater robot 12.

[0028] In this embodiment, preferably, the free end of the suspension lock 5 passes through the first protective tube 3, and a hook is connected to the free end of the suspension lock 5. The hook is connected to the end of the cable 6, that is, the hanging ring of the suspension lock 5, so as to suspend the cable 6 in an emergency.

[0029] The cable 6 is equipped with a cable end 7. During normal pulling operation, the winch 10 is connected to the cable end 7 to pull the cable 6. When the anti-bend flange 11 is about 1m away from the bottom protective pipe flange 13, a diver needs to enter the water to unlock the anti-bend. Only then can the winch 10 continue to pull the cable 6. The hook of the suspension rigging 5 is connected to the lifting ring by the underwater robot 12.

[0030] This application also provides a method for emergency suspension of dynamic cables for cylindrical FPSOs, mainly including the following steps: S1. Make a suspension beam 1 in advance using the first I-beam 11, the second I-beam 12 and the third I-beam 13 and the lifting lug 8. Secure it to the top of the first protective pipe 3. Connect the suspension sling 5 below the lifting lug 8 so that the suspension sling 5 passes through the first protective pipe 3. Ensure that the length of the suspension sling 5 is sufficient to reach the bottom of the first protective pipe 3. Connect the hook to the end of the suspension sling 5. S2. During normal pulling operation, the winch 10 is connected to the cable end 7 and the cable 6 is pulled. When the anti-bend flange 11 is about 1m away from the bottom protective pipe flange 13, a diver needs to enter the water to unlock the anti-bend device before the winch can continue to pull the cable 6. S3. When the diver has no continuous working window, the suspension beam 1 is snapped into the first protective pipe 3, and the suspension rigging 5 is connected to the first I-beam 11 of the suspension beam 1. S4. The suspension rigging 5 passes through the first protective pipe 3 and is connected to the cable end 7 via a hook. S5. The winch 10 lowers the cable 6 so that the weight of the cable 6 is transferred to the suspension sling 5. S6. When the tension of the cable 6 is completely transferred from the winch 10 to the suspension rigging 2, the underwater robot 12 disconnects the winch 10 from the cable end 7 underwater. S7, Recovery winch 10.

[0031] Based on the cylindrical FPSO dynamic cable emergency suspension device and its suspension method, the dynamic cable 6 is suspended in an emergency by adding a suspension sling 5 inside the first protective pipe 3; the suspension beam 1 is spliced ​​from the first I-beam 11, the second I-beam 12 and the third I-beam 13, and the lifting lug 8 is welded to the center of the bottom surface and fixed at the opening of the first protective pipe 3. After it is fixed, a set of suspension slings 5 ​​is connected and pre-lowered for temporary suspension of the end of the dynamic cable 6 in emergency situations.

[0032] Make a reserved lifting ring in the first protective pipe 3 as an emergency suspension point, with the anti-bend device unlocking as the node. In case of emergency, if the diver is unable to work, temporarily suspend the end of the dynamic cable on the reserved suspension rigging 5 in the first protective pipe 3 to ensure the suspension of the cable 6 in an emergency.

[0033] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cylindrical FPSO dynamic cable emergency suspension device, characterized in that, It includes a suspension beam connected to the hull. The side of the suspension beam away from the hull is connected to the first protective tube. A suspension rigging is connected to the suspension beam. The suspension rigging is installed inside the first protective tube. One end of the suspension rigging extends out of the first protective tube and is connected to the end of the cable so that the cable is suspended on the suspension rigging.

2. The cylindrical FPSO dynamic cable emergency suspension device according to claim 1, characterized in that, The suspension beam consists of a first I-beam, a second I-beam, and a third I-beam, with the second and third I-beams symmetrically connected to the first I-beam.

3. The cylindrical FPSO dynamic cable emergency suspension device according to claim 2, characterized in that, A lifting lug is connected along the length of the first I-beam, and a suspension rigging is connected to the lifting lug.

4. The cylindrical FPSO dynamic cable emergency suspension device according to claim 2, characterized in that, Limiting blocks are connected to the first, second, and third I-beams, and the inner wall of the first protective tube abuts against the limiting blocks.

5. The cylindrical FPSO dynamic cable emergency suspension device according to claim 3, characterized in that, The end of the suspension sling away from the lug passes through the first protective pipe and is connected to the shackle at the end of the cable via a hook.

6. The cylindrical FPSO dynamic cable emergency suspension device according to claim 5, characterized in that, The cable end is connected to the winch that passes through the second conduit, and the end of the cable away from the cable end is connected to the anti-bend flange.

7. The cylindrical FPSO dynamic cable emergency suspension device according to claim 6, characterized in that, The hooks of the suspension rigging are attached to the rings by an underwater robot.

8. A method for emergency suspension of dynamic cable in a cylindrical FPSO, characterized in that, The main steps include: S1. Connect the suspension beam to the first protective pipe and connect the suspension rigging to the first I-beam of the suspension beam; S2. The suspension rigging passes through one end of the first protective pipe and is connected to the end of the cable via a hook. S3. The winch lowers the cable to transfer the weight of the cable to the suspension rigging; S4. Once the tension of the cable has been completely transferred from the winch to the suspension rigging, the underwater robot disconnects the winch from the cable end underwater. S5, Recovery winch.

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