Multi-point mooring cylindrical floating production oil storage and discharge device

Abstract

The invention discloses a multi-point mooring cylindrical floating production oil storage and offloading device, which belongs to the field of floating production oil storage and offloading devices, and comprises a cylindrical ship body, a main deck is arranged at the top of the cylindrical ship body, a process deck is arranged right above the main deck, and the process deck is supported on the main deck through a stand column or a frame structure. A production module and a life and function module are arranged on the process deck, and a fireproof and explosion-proof wall is arranged between the production module and the life and function module. When a fire occurs in the production module, all workers pass through the fire-proof and explosion-proof wall to enter a safe area of the life and function module, a fire-proof system in the production module is started for automatic fire fighting, and if the fire cannot be extinguished and the production module further causes explosion, the fire-proof system is started. Personnel in the safe area of the life and function module enter the helicopter platform module and evacuate orderly, so that the personal safety of workers on the cylindrical ship body is ensured to the maximum extent.

Description

Technical Field

[0001] The invention relates to the technical field of a floating production storage and offloading device, in particular to a multi-point mooring cylindrical floating production storage and offloading device. Background Art

[0002] With the country's growing energy demand and the development of marine resource exploration, oil extraction is moving towards the deep sea. In order to meet the challenges of deepwater oil and gas reservoir development, deepwater development mostly adopts the development model of floating production platforms. FPSO (Floating Production Storage & Offloading, usually translated literally as floating production storage and offloading device) is currently a common carrier and method for deepwater oil and gas development, usually including ship-type and cylinder-type.

[0003] During the production and equipment maintenance process, the flammable liquid in the production module of the production storage and unloading device flows out and evaporates to form an explosive mixed gas. The construction workers use non-explosion-proof tools, which is easy to generate sparks, resulting in the deflagration of the mixed gas, posing a serious threat to the personal safety of the workers on the floating body. How to ensure the personal safety of the workers on the floating body is a problem that needs to be solved at present. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a multi-point moored cylindrical floating production storage and offloading device that ensures the personal safety of the staff on the cylindrical hull.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A multi-point moored cylindrical floating production storage and offloading device comprises a cylindrical hull, a main deck is arranged on the top of the cylindrical hull, a process deck is arranged directly above the main deck, the process deck is supported on the main deck by columns or a frame structure, a production module and a living and functional module are arranged on the process deck, a fireproof and explosion-proof wall is arranged between the production module and the living and functional module, when a fire or explosion occurs in the production module, the fireproof and explosion-proof wall buys time for the evacuation of personnel in the living and functional module area.

[0006] Furthermore, the fireproof and explosion-proof wall comprises a fireproof front wall steel frame, an explosion-proof middle wall steel plate and an explosion-proof rear wall steel frame. The fireproof front wall steel frame is welded on the process deck and maintains a certain gap with the explosion-proof middle wall steel plate. The explosion-proof rear wall steel frame is welded on the process deck and welded together with the explosion-proof middle wall steel plate. At least two steel mesh plates are installed on the fireproof front wall steel frame, and fireproof cotton is arranged between adjacent steel mesh plates; the explosion-proof middle wall steel plate is a composite steel plate layer structure with a thickness of 50 cm formed by stacking multiple 10 cm thick steel plates; the explosion-proof rear wall steel frame is provided with a spray cooling system and a CO2 jet fire extinguishing system. The spray cooling system is used to spray water to the fireproof front wall steel frame, and the CO2 jet fire extinguishing system is used to spray CO2 to the fireproof front wall steel frame.

[0007] Furthermore, the living and functional module includes an accommodation area, an office area, a restaurant and a public fitness area. The accommodation area is located on the right side of the top of the cylindrical hull. A helicopter platform module is provided on one side of the top of the accommodation area, and the helicopter platform module extends outwardly beyond the cylindrical hull.

[0008] Furthermore, the production module includes a burner arm, which is located on the right side of the top of the cylindrical hull, and the upper end of the burner arm is inclined in the direction away from the cylindrical hull. The upper end of the burner arm is inclined outward, and this design has two functions: first, it can make the reverse torque generated by the helicopter platform module and the burner arm on the cylindrical hull offset each other to increase the stability of the cylindrical hull; second, it can make the open flame at the upper end of the burner arm away from the production module on the cylindrical hull to improve production safety.

[0009] Furthermore, it also includes a mooring system, which is divided into three groups. Each mooring system includes an anchor winch, a cable stopper, a cable guide wheel assembly, a mooring cable and a fixed anchor. The anchor winch and the cable stopper are located on the main deck of the cylindrical hull. One end of the mooring cable is wound on the anchor winch, and the other end of the mooring cable passes through the cable guide wheel assembly and is connected to the fixed anchor. The cable stopper is used to lock the mooring cable.

[0010] Furthermore, the mooring cable adopts a polyester cable with a diameter of 240mm-280mm. Polyester cable is close to self-floating in water due to its high strength, light weight and good tensile performance. It can be used in tensioned mooring systems, thereby reducing the vertical load of the entire mooring chain, improving the restoring stiffness of the mooring system in the horizontal plane, and is conducive to improving the positioning performance of the entire mooring system. At the same time, it helps to reduce the maximum tension response of the mooring chain, which is helpful for reducing the chain diameter of the traction chain. Experiments have shown that compared with steel cables and anchor chains, polyester mooring cables not only have strong seawater corrosion resistance, do not need to increase sacrificial anode protection or increase the diameter to provide corrosion allowance, but also have better fatigue performance. The strength / mass ratio of polyester mooring cables with the same breaking strength is higher, and the cost is only half of that of steel cables. The creep of polyester cables after long-term use, that is, the problem that the ropes become longer and longer with use, can be solved by adjusting the mooring chain with a mooring winch.

[0011] Furthermore, three sections of arc-shaped skirt plate structures are provided around the lower end of the cylindrical hull, and the three sections of arc-shaped skirt plate structures are used to improve the movement characteristics by utilizing the influence of hydrodynamic damping; the outer sides of the arc-shaped skirt plate structures are inclined toward the cylindrical hull to form an inclined frame structure, and the inclined frame structure is used to improve the fatigue capacity of the annular skirt plate structure itself; gaps are left between adjacent arc-shaped skirt plate structures, and the mooring chains on each group of mooring systems pass through the gaps.

[0012] Furthermore, the periphery above the main deck is a bulwark structure, which is an open frame structure that extends upward and floats outward and can be naturally ventilated. The bulwark structure with natural ventilation characteristics of the present application can also block waves on the deck under severe weather conditions, while allowing air to pass through but reducing the speed and quantity. In addition, the free flow of air inside the platform reduces the risk of explosion caused by the accumulation of flammable gases. The bulwark structure of the present application not only increases stability and expands the area of ​​the process deck, but also solves the impact of slamming loads and waves on the deck.

[0013] Furthermore, a 700mm high wave-breaking board is arranged on the main deck and on the inner side of the bulwark structure.

[0014] Furthermore, a plurality of drainage grooves are arranged on the main deck and on the inner side of the bulwark structure, and the drainage grooves are used to solve the problem of water accumulation when the waves surge into the main deck.

[0015] The beneficial effects of the present invention are: In the present application, a fireproof and explosion-proof wall is added to the cylindrical hull. When a fire occurs in the production module, all staff members pass through the fireproof and explosion-proof wall to enter the safe area of ​​the living and functional modules, and the fire protection system in the production module is activated for automatic firefighting. If the fire cannot be extinguished and the production module further causes an explosion, the personnel in the safe area of ​​the living and functional modules enter the helicopter platform module for orderly evacuation to maximize the personal safety of the staff on the cylindrical hull.

[0016] This application uses a disc-type structure and a multi-point mooring system, coupled with a cylindrical structure, which can effectively reduce the wind-affected area and wind force, and the stability reaches a safe level of resisting 12-level wind and waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described with the aid of the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other accompanying drawings according to the following drawings without creative work: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 The top view shown; Figure 3 for Figure 1 The structural schematic diagram of the fire and explosion proof wall is shown.

[0018] In the figure: 1. Cylindrical hull; 2. Main deck; 3. Process deck; 4. Frame structure; 5. Production module; 6. Living and functional module; 7. Fireproof and explosion-proof wall; 8. Accommodation area; 9. Helicopter platform module; 10. Burning arm; 11. Mooring system; 12. Curved skirt structure; 13. Gap; 14. Bulwark structure; 15. Breakwater; 16. Drainage trough; 17. Mooring cable; 18. Office area; 19. Restaurant and public fitness area; 71. Fireproof front wall steel frame; 72. Explosion-proof middle wall steel plate; 73. Explosion-proof rear wall steel frame; 74. Steel mesh plate; 75. Fireproof cotton; 76. Sprinkler cooling system; 77. CO2 jet fire extinguishing system. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "forward", "reverse", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] like Figure 1 , 2 As shown, a multi-point moored cylindrical floating production storage and offloading device includes a cylindrical hull 1, a main deck 2 is provided on the top of the cylindrical hull 1, a process deck 3 is provided directly above the main deck 2, the process deck 3 is supported on the main deck 2 by a frame structure 4, a production module 5 and a living and functional module 6 are provided on the process deck 3, a fireproof and explosion-proof wall 7 is provided between the production module 5 and the living and functional module 6, when a fire or explosion occurs in the production module 5, the fireproof and explosion-proof wall 7 buys time for the evacuation of personnel in the living and functional module area.

[0022] The living and functional module 6 includes an accommodation area 8, an office area 18, a restaurant and a public fitness area 19. The accommodation area 8 is located on the right side of the top of the cylindrical hull 1. A helicopter platform module 9 is provided on one side of the top of the accommodation area 8. The helicopter platform module 9 extends outwardly beyond the cylindrical hull 1. The production module 5 includes a combustion arm 10. The combustion arm 10 is located on the right side of the top of the cylindrical hull 1. The upper end of the combustion arm 10 is inclined in the direction away from the cylindrical hull 1. This design can make the reverse torque generated by the helicopter platform module 9 and the combustion arm 10 on the cylindrical hull 1 offset each other, so as to increase the stability of the cylindrical hull 1.

[0023] It also includes a mooring system 11, which is divided into three groups. Each mooring system 11 includes an anchor winch, a cable stopper, a cable guide wheel assembly, a mooring cable and a fixed anchor. The anchor winch and the cable stopper are located on the main deck of the cylindrical hull. One end of the mooring cable is wound on the anchor winch, and the other end of the mooring cable passes through the cable guide wheel assembly and is connected to the fixed anchor. The cable stopper is used to lock the mooring cable. The biggest feature of the mooring system 11 of the present application is that the mooring cable 17 adopts a polyester cable with a diameter of 240mm-280mm. Polyester cable has high strength, light weight and good tensile properties. It is close to self-floating in water and can be used in tensioned mooring systems, thereby reducing the vertical load of the entire mooring chain, improving the restoring stiffness of the mooring system in the horizontal plane, and is beneficial to improving the positioning performance of the entire mooring system. At the same time, it helps to reduce the maximum tension response of the mooring chain and is helpful to reduce the chain diameter of the traction chain. Tests have shown that compared with steel cables and anchor chains, polyester mooring cables not only have stronger seawater corrosion resistance, do not require additional sacrificial anode protection or increase the diameter to provide corrosion allowance, but also have better fatigue performance. Polyester mooring cables with the same breaking strength have a higher strength / mass ratio and cost only half of steel cables. The creep of polyester cables after long-term use, that is, the problem of the cables getting longer with use, can be solved by adjusting the mooring chain with a mooring winch.

[0024] Three sections of arc-shaped skirt plate structures 12 are provided around the lower end of the cylindrical hull 1, and the three sections of arc-shaped skirt plate structures 12 are used to improve the movement characteristics by utilizing the influence of hydrodynamic damping; the outer sides of the arc-shaped skirt plate structures 12 are inclined toward the cylindrical hull to form an inclined frame structure, and the inclined frame structure is used to improve the fatigue capacity of the annular skirt plate structure itself; gaps 13 are left between adjacent arc-shaped skirt plate structures 12, and the mooring chains on each group of mooring systems 11 pass through the gaps 13.

[0025] The periphery above the main deck 2 is a bulwark structure 14, which is an open frame structure that extends upward and floats outward and can be naturally ventilated. The bulwark structure with natural ventilation characteristics of the present application can also block waves on the deck under severe weather conditions, while allowing air to pass through but reducing the speed and quantity. In addition, the free flow of air inside the platform reduces the risk of explosion caused by the accumulation of flammable gases. The bulwark structure of the present application not only increases stability and expands the area of ​​the process deck, but also solves the impact of slamming loads and waves on the deck.

[0026] A 700 mm high wave-breaking board 15 is arranged on the main deck 2 and located inside the bulwark structure 14. A plurality of drainage grooves 16 are arranged on the main deck 2 and located inside the bulwark structure 14, and the drainage grooves 16 are used to solve the water accumulation of the upper waves rushing into the main deck.

[0027] like Figure 3As shown, the fireproof and explosion-proof wall 7 includes a fireproof front wall steel frame 71, an explosion-proof middle wall steel plate 72 and an explosion-proof rear wall steel frame 73. The fireproof front wall steel frame 71 is welded on the process deck 3 and maintains a certain gap with the explosion-proof middle wall steel plate 72. The explosion-proof rear wall steel frame 73 is welded on the process deck 3 and welded together with the explosion-proof middle wall steel plate 72. At least two steel mesh plates 74 are installed on the fireproof front wall steel frame 71, and fireproof cotton 75 is arranged between adjacent steel mesh plates 74; the explosion-proof middle wall steel plate 72 is a composite steel plate layer structure with a thickness of 50 cm formed by stacking multiple 10 cm thick steel plates; the explosion-proof rear wall steel frame 73 is provided with a spray cooling system 76 and a CO2 jet fire extinguishing system 77. The spray cooling system 76 is used to spray water to the fireproof front wall steel frame 71, and the CO2 jet fire extinguishing system 77 is used to spray CO2 to the fireproof front wall steel frame 71.

[0028] Working principle: In the present application, a fireproof and explosion-proof wall 7 is added to the cylindrical hull 1. When a fire occurs in the production module 5, all staff members pass through the fireproof and explosion-proof wall 7 to enter the safe area of ​​the living and functional modules, and the fire protection system in the production module 5 is activated for automatic firefighting. If the fire cannot be extinguished and the production module further causes an explosion, the personnel in the safe area of ​​the living and functional modules enter the helicopter platform module 9 for orderly evacuation to maximize the personal safety of the staff on the cylindrical hull 1.

[0029] In addition, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradiction. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A multi-point moored cylindrical floating production storage and offloading device, comprising a cylindrical hull, a main deck is arranged on the top of the cylindrical hull, a process deck is arranged directly above the main deck, the process deck is supported on the main deck by columns or a frame structure, a production module and a living and functional module are arranged on the process deck, characterized in that: A fireproof and explosion-proof wall is provided between the production module and the living and functional module. When a fire or explosion occurs in the production module, the fireproof and explosion-proof wall buys time for the personnel in the living and functional module area to evacuate.

2. The multi-point moored cylindrical floating production storage and offloading unit according to claim 1, characterized in that: The fireproof and explosion-proof wall comprises a fireproof front wall steel frame, an explosion-proof middle wall steel plate and an explosion-proof rear wall steel frame. The fireproof front wall steel frame is welded on the process deck and a certain gap is maintained between the explosion-proof middle wall steel plate. The explosion-proof rear wall steel frame is welded on the process deck and welded together with the explosion-proof middle wall steel plate. At least two steel mesh plates are installed on the fireproof front wall steel frame, and fireproof cotton is arranged between adjacent steel mesh plates; the explosion-proof middle wall steel plate is a composite steel plate layer structure with a thickness of 50 cm formed by stacking multiple 10 cm thick steel plates; the explosion-proof rear wall steel frame is provided with a spray cooling system and a CO2 jet fire extinguishing system. The spray cooling system is used to spray water to the fireproof front wall steel frame, and the CO2 jet fire extinguishing system is used to spray CO2 to the fireproof front wall steel frame.

3. The multi-point moored cylindrical floating production storage and offloading unit according to claim 2 is characterized in that: The living and functional modules include an accommodation area, an office area, a restaurant and a public fitness area. The accommodation area is located on the right side of the top of the cylindrical hull. A helicopter platform module is provided on one side of the top of the accommodation area, and the helicopter platform module extends outwardly beyond the cylindrical hull.

4. The multi-point moored cylindrical floating production storage and offloading unit according to claim 3 is characterized in that: The production module comprises a combustion arm, which is located on the right side of the top of the cylindrical hull, and the upper end of the combustion arm is inclined in a direction away from the cylindrical hull.

5. The multi-point moored cylindrical floating production storage and offloading unit according to claim 1, characterized in that: It also includes a mooring system, which is divided into three groups. Each mooring system includes an anchor winch, a cable stopper, a cable guide wheel assembly, a mooring cable and a fixed anchor. The anchor winch and the cable stopper are located on the main deck of the cylindrical hull. One end of the mooring cable is wound around the anchor winch, and the other end of the mooring cable passes through the cable guide wheel assembly and is connected to the fixed anchor. The cable stopper is used to lock the mooring cable.

6. The multi-point moored cylindrical floating production storage and offloading unit according to claim 5, characterized in that: The mooring cable is a polyester cable with a diameter of 240mm-280mm.

7. The multi-point moored cylindrical floating production storage and offloading unit according to claim 6, characterized in that: Three sections of arc-shaped skirt plate structures are arranged around the lower end of the cylindrical hull, and the three sections of arc-shaped skirt plate structures are used to improve the movement characteristics by utilizing the influence of hydrodynamic damping; the outer sides of the arc-shaped skirt plate structures are inclined toward the cylindrical hull to form an inclined frame structure, and the inclined frame structure is used to improve the fatigue capacity of the annular skirt plate structure itself; gaps are left between adjacent arc-shaped skirt plate structures, and the mooring chains on each group of mooring systems pass through the gaps.

8. The multi-point moored cylindrical floating production storage and offloading unit according to claim 1, characterized in that: The periphery above the main deck is a bulwark structure, and the bulwark structure is an open frame structure that extends upward and outward and can be naturally ventilated.

9. The multi-point moored cylindrical floating production storage and offloading unit according to claim 8, characterized in that: A 700mm high wave-breaking board is arranged on the main deck and on the inner side of the bulwark structure.

10. The multi-point moored cylindrical floating production storage and offloading unit according to claim 9, characterized in that: A plurality of drainage grooves are arranged on the main deck and on the inner side of the bulwark structure, and the drainage grooves are used to solve the problem of water accumulation when the waves surge into the main deck.

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