Top cover heating type floating production oil storage and discharge device

Abstract

The invention discloses a top cover heating type floating production oil storage and offloading device, which belongs to the field of floating production oil storage and offloading devices, and comprises a cylindrical floating body, a main deck is arranged at the top of the cylindrical floating body, and a plurality of cargo oil tanks are arranged in the cylindrical floating body and positioned below the main deck; a cavity type top cover is arranged at the top of each cargo oil tank, a plate heat exchanger and a circulating oil pump are arranged in a cavity of each cavity type top cover and connected to a cargo oil circulating pipeline in series, and the circulating oil pumps drive cargo oil in the cargo oil tanks to flow circularly through the cargo oil circulating pipelines. And the plate heat exchanger is used for heating and preserving heat of cargo oil in the cargo oil tank. The structure of the cavity type top cover and the heating form of the plate heat exchanger are adopted, and the plate heat exchanger and the circulating oil pump are arranged in the cavity type top cover, so that the warehousing frequency of workers is greatly reduced, equipment overhaul is facilitated, the overhaul working efficiency is greatly improved, and the manufacturing cost and the later maintenance cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of a floating production storage and offloading device, in particular to a top cover heating type floating production storage and offloading device. Background Art

[0002] In order to cope with the challenges of deepwater oil and gas reservoir development, deepwater development mostly adopts the development model of floating production platforms. FPSO (short for Floating Production Storage & Offloading, usually literally translated as floating production storage and offloading device) is currently the most common carrier and method for deepwater oil and gas development, usually including two forms: ship type and cylinder type. FPSO is a comprehensive large-scale offshore oil production base that separates oil and gas from the extracted oil, treats oily wastewater, generates power, provides heat, stores and transports crude oil products, and integrates personnel accommodation and production command systems. FPSO usually forms a complete oil production, crude oil processing, oil storage and oil unloading system with an oil drilling platform or a submarine oil production system. Its operating principle is: receiving crude oil extracted from submarine oil wells through submarine oil pipelines, processing it on board, then storing it in cargo tanks, and finally transporting it to shuttle tankers through an unloading system.

[0003] The existing floating production storage and offloading device has the following shortcomings: first, coils are used in the cargo oil tank to heat and insulate the cargo oil. This structure not only has high manufacturing costs, but also high subsequent maintenance costs. In particular, the cargo oil pump is also arranged in the cargo oil tank. Each maintenance requires entering the cargo oil tank. In addition, since the working environment in the cargo oil tank is not friendly to the maintenance personnel, the cargo oil tank must be inerted, cleaned, and cleaned with inert gas before maintenance. The workload is large, the time is long, and the maintenance is extremely inconvenient; second, when filling or unloading the cargo oil tank, the entire cylindrical float will tilt; third, the ballast adjustment of the ballast tank adopts a water pumping method, which has low work efficiency and consumes energy when reducing the tank and pumping water. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies, the object of the present invention is to provide a top cover heated floating production storage and offloading device which is convenient for equipment maintenance and can reduce manufacturing cost and maintenance cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A top cover heated floating production storage and offloading device comprises a cylindrical buoy, a main deck is arranged on the top of the cylindrical buoy, a plurality of cargo oil tanks are arranged inside the cylindrical buoy and below the main deck, a cavity top cover is arranged on the top of each cargo oil tank, a plate heat exchanger and a circulating oil pump are arranged in the cavity of the cavity top cover, the plate heat exchanger and the circulating oil pump are connected in series to a cargo oil circulation pipeline, the circulating oil pump drives the cargo oil in the cargo oil tank to circulate through the cargo oil circulation pipeline, and the plate heat exchanger is used to heat and keep the cargo oil in the cargo oil tank warm.

[0006] Furthermore, a cargo oil pump is provided in the cavity type top cover, a port of the cargo oil pump is connected to one end of an oil guide pipe, the other end of the oil guide pipe extends downward into the bottom of the cargo oil tank, the other end of the cargo oil pump is communicated with the oil pipe joint on the cavity type top cover, and the cargo oil pump is used to fill or unload oil into the cargo oil tank.

[0007] Furthermore, the cavity top cover is flush with the upper surface of the main deck, and an inspection port is provided on the upper surface of the cavity top cover, and a cover plate is provided at the inspection port. The cargo oil tank of the present application changes the traditional way of arranging coil heating in the tank, and adopts a plate heat exchanger, especially the plate heat exchanger is arranged in the cavity top cover. Without opening or entering the cargo oil tank, the plate heat exchanger and the oil pump in the cavity top cover can be inspected by opening the cover plate, and the maintenance operation is extremely convenient, which not only reduces the manufacturing cost, but also greatly reduces the cost of later maintenance.

[0008] Furthermore, the number of the cargo oil tanks is multiple and an even number, the dirty oil tank is located in the middle of the cylindrical floating body, and the multiple cargo oil tanks are arranged in the cylindrical floating body and are located at the periphery of the dirty oil tank.

[0009] Furthermore, a plurality of ballast tanks equal to the number of cargo oil tanks are provided in the cylindrical floating body and directly below the plurality of cargo oil tanks, a water inlet is provided at the bottom of the ballast tank, a solenoid valve is provided at the water inlet, an inflation wiring pipe column is provided at the central portion of the cylindrical floating body, a plurality of inflation pipes are arranged in the inflation wiring pipe column, the lower ends of the plurality of inflation pipes are respectively connected with the top sides of the plurality of ballast tanks, and the upper ends of the plurality of inflation pipes are respectively connected with a plurality of inflation pumps; when one of the cargo oil tanks is filled with oil, the solenoid valve of the ballast tank directly below the cargo oil tank is opened, and the inflation pump inflates the ballast tank to discharge the water in the ballast tank outward, and at the same time, the solenoid valve of the ballast tank directly below the cargo oil tank corresponding to the cargo oil tank on the other side of the cylindrical floating body is opened to allow external water to flow into the ballast tank to level the cylindrical floating body.

[0010] Furthermore, the inflation wiring pipe column extends upward through the dirty oil tank to above the main deck, and the multiple inflation pumps are arranged on the main deck.

[0011] Furthermore, the number of cargo oil tanks and ballast tanks is 6 or 8 respectively.

[0012] Furthermore, a spare oil pipe joint is provided on the cavity type top cover, and the spare oil pipe joint is connected to the spare oil guide pipe in the cargo oil tank. A mobile spare cargo oil pump is provided on the main deck; when the cargo oil pump in the cavity type top cover of a cargo oil tank fails, the mobile spare cargo oil pump is temporarily connected to the spare oil pipe joint, so that the mobile spare cargo oil pump temporarily replaces the work of the cargo oil pump.

[0013] Furthermore, each of the cargo oil tanks is equipped with three tank cleaning machines, which use heated cargo oil to clean the cargo oil tanks, or use heated production water or seawater to clean the cargo oil tanks when it is necessary to enter the cargo oil tanks for inspection or maintenance.

[0014] Furthermore, the cargo oil pump adopts a 500m 3 / h long shaft variable frequency cargo oil pump.

[0015] The beneficial effects of the present invention are: The present application adopts a cavity top cover structure and a plate heat exchanger heating form, and places the plate heat exchanger and the circulating oil pump inside the cavity top cover, which greatly reduces the number of times staff enter the warehouse, not only facilitating equipment maintenance and greatly improving maintenance work efficiency, but also reducing manufacturing costs and subsequent maintenance costs.

[0016] The present application adopts a structural form of an even number of cargo oil tanks, so that the even number of cargo oil tanks are evenly and symmetrically distributed around the dirty oil tank in the cylindrical floating body, especially the ballast tank is arranged below the cargo oil tank and corresponds to the even number of cargo oil tanks. When the cargo oil tank on one side of the cylindrical floating body is filled with oil or unloaded with oil, the ballast tank below the cargo oil tank is adjusted in addition to the ballast tank below the cargo oil tank on the other side, which greatly enhances the leveling effect of the cylindrical floating body.

[0017] The present application adds an electromagnetic valve at the bottom of the ballast tank, which cooperates with the air pump to achieve ballast adjustment of the ballast tank. When the tank needs to be reduced, there is no need to reduce the tank by pumping water, but to open the electromagnetic valve, and external water can enter the tank, thus saving pumping energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 Schematic diagram of the structure of the cavity top cover shown.

[0019] In the figure: 1. Cylindrical buoy; 2. Main deck; 3. Cargo oil tank; 4. Cavity top cover; 5. Dirty oil tank; 6. Ballast tank; 7. Water inlet; 8. Solenoid valve; 9. Inflatable wiring pipe column; 10. Inflatable pipe; 11. Inflatable pump; 12. Cavity; 13. Plate heat exchanger; 14. Circulating oil pump; 15. Cargo oil circulation pipeline; 16. Cargo oil pump; 17. Oil guide pipe; 18. Oil pipe joint; 19. Inspection port; 20. Cover plate; 21. Spare oil pipe joint; 22. Spare oil guide pipe; 23. Mobile spare cargo oil pump. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] like Figure 1 , 2As shown, a top cover heated floating production storage and offloading device comprises a cylindrical float 1, a main deck 2 is provided on the top of the cylindrical float 1, a plurality of cargo oil tanks 3 are provided in the cylindrical float 1 and below the main deck 2, a cavity top cover 4 is provided on the top of each cargo oil tank 3, the number of the cargo oil tanks 3 is multiple and an even number, specifically 8, a dirty oil tank 5 is located in the middle of the cylindrical float 1, and 8 cargo oil tanks 3 are provided in the cylindrical float and on the periphery of the dirty oil tank 5. Eight ballast tanks 6, which are equal to the number of the cargo oil tanks 3, are arranged in the cylindrical floating body 1 and directly below the eight cargo oil tanks 3. A water inlet 7 is arranged at the bottom of the ballast tank 6, and a solenoid valve 8 is arranged at the water inlet 7. An air-filling wiring column 9 is arranged in the central part of the cylindrical floating body 1. Eight air-filling pipes 10 are arranged in the air-filling wiring column 9. The lower ends of the eight air-filling pipes 10 are respectively connected to the top sides of the eight ballast tanks 6, and the upper ends of the eight air-filling pipes 10 are respectively connected to eight air pumps 11. When one of the cargo oil tanks 5 is filled with oil, the solenoid valve 8 of the ballast tank 6 directly below the cargo oil tank 5 is opened, and the air pump 11 inflates the ballast tank 6 to discharge the water in the ballast tank 6 outward. At the same time, the solenoid valve of the ballast tank directly below the cargo oil tank corresponding to the cargo oil tank on the other side of the cylindrical floating body 1 is opened to allow external water to flow into the ballast tank to level the cylindrical floating body. The present application adopts a structural form of an even number of cargo oil tanks, so that the even number of cargo oil tanks are evenly and symmetrically distributed around the dirty oil tank in the cylindrical floating body, especially the ballast tank is set below the cargo oil tank and corresponds to the even number of cargo oil tanks. When the cargo oil tank on one side of the cylindrical floating body is filled or unloaded, the ballast tank below the cargo oil tank is ballast-adjusted, and the ballast tank below the cargo oil tank on the other side is also ballast-adjusted at the same time, which greatly enhances the leveling effect of the cylindrical floating body. The present application adds a solenoid valve at the bottom of the ballast tank, which cooperates with the air pump to realize the ballast adjustment of the ballast tank. When it is necessary to reduce the tank, it is not necessary to reduce the tank by pumping water, but to open the solenoid valve, and the external water can enter the tank, thereby saving the energy consumption of pumping water.

[0023] Specifically, the inflation wiring pipe column 9 extends upward through the dirty oil tank 5 to above the main deck 2, and eight inflation pumps 11 are arranged on the main deck 2. Such a design can facilitate the maintenance of the inflation pumps 11.

[0024] In addition, each of the cargo oil tanks 3 is equipped with three tank cleaning machines, which use heated cargo oil to clean the cargo oil tanks, or use heated production water or seawater to clean the cargo oil tanks when it is necessary to enter the cargo oil tanks for inspection or maintenance.

[0025] like Figure 3As shown, a plate heat exchanger 13 and a circulating oil pump 14 are arranged in the cavity 12 of the cavity top cover 4. The plate heat exchanger 13 and the circulating oil pump 14 are connected in series to the cargo oil circulation pipeline 15. The circulating oil pump 14 drives the cargo oil in the cargo oil tank 3 to circulate through the cargo oil circulation pipeline 15. The plate heat exchanger 13 is used to heat and keep the cargo oil in the cargo oil tank 3 warm. A cargo oil pump 16 is arranged in the cavity top cover 4. The port of the cargo oil pump 16 is connected to one end of an oil guide pipe 17. The other end of the oil guide pipe 17 extends downward into the bottom of the cargo oil tank 3. The other end of the cargo oil pump 16 is connected to an oil pipe joint 18 on the cavity top cover 4. The cargo oil pump 16 is used to fill or unload the cargo oil tank 3. The cargo oil pump 16 adopts a 500m 3 / h long-axis variable frequency cargo oil pump. The cavity top cover 4 is flush with the upper surface of the main deck 2, and an inspection port 19 is provided on the upper surface of the cavity top cover 4, and a cover plate 20 is provided at the inspection port 19. The cargo oil tank of the present application changes the traditional way of arranging coil heating in the tank, and adopts a plate heat exchanger, especially the plate heat exchanger is arranged in the cavity top cover. Without opening or entering the cargo oil tank, the plate heat exchanger and the oil pump in the cavity top cover can be inspected by opening the cover plate, and the maintenance operation is extremely convenient, which not only reduces the manufacturing cost, but also greatly reduces the cost of later maintenance.

[0026] A spare oil pipe joint 21 is provided on the cavity top cover 4, and the spare oil pipe joint 21 is connected to the spare oil guide pipe 22 in the cargo oil tank. A mobile spare cargo oil pump 23 is provided on the main deck 2; when the cargo oil pump in the cavity top cover of a cargo oil tank fails, the mobile spare cargo oil pump 23 is temporarily connected to the spare oil pipe joint 21, so that the mobile spare cargo oil pump 23 temporarily replaces the work of the cargo oil pump 16.

[0027] 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 top cover heated floating production storage and offloading device, comprising a cylindrical floating body, the top of which is provided with a main deck, characterized in that: A plurality of cargo oil tanks are arranged in the cylindrical floating body and below the main deck, and a cavity-type top cover is arranged on the top of each cargo oil tank. A plate heat exchanger and a circulating oil pump are arranged in the cavity of the cavity-type top cover. The plate heat exchanger and the circulating oil pump are connected in series to the cargo oil circulation pipeline. The circulating oil pump drives the cargo oil in the cargo oil tank to circulate through the cargo oil circulation pipeline, and the plate heat exchanger is used for heating and keeping warm the cargo oil in the cargo oil tank.

2. The top cover heating type floating production storage and offloading unit according to claim 1 is characterized in that: A cargo oil pump is provided in the cavity top cover, a port of the cargo oil pump is connected to one end of an oil guide pipe, the other end of the oil guide pipe extends downward into the bottom of the cargo oil tank, the other end of the cargo oil pump is communicated with an oil pipe joint on the cavity top cover, and the cargo oil pump is used for filling or unloading oil into the cargo oil tank.

3. The top cover heating type floating production storage and offloading unit according to claim 2 is characterized in that: The cavity type top cover is flush with the upper surface of the main deck, and an inspection opening is provided on the upper surface of the cavity type top cover, and a cover plate is provided at the inspection opening.

4. The top cover heating type floating production storage and offloading unit according to claim 3 is characterized in that: The number of the cargo oil tanks is multiple and an even number, the dirty oil tank is located in the middle of the cylindrical floating body, and the multiple cargo oil tanks are arranged in the cylindrical floating body and are located at the periphery of the dirty oil tank.

5. The top cover heating type floating production storage and offloading unit according to claim 4 is characterized in that: A plurality of ballast tanks equal to the number of cargo oil tanks are provided in the cylindrical floating body and directly below the plurality of cargo oil tanks, a water inlet is provided at the bottom of the ballast tank, a solenoid valve is provided at the water inlet, an air-filled wiring column is provided at the central portion of the cylindrical floating body, a plurality of air-filled pipes are arranged in the air-filled wiring column, the lower ends of the plurality of air-filled pipes are respectively connected with the top sides of the plurality of ballast tanks, and the upper ends of the plurality of air-filled pipes are respectively connected with a plurality of air pumps; when one of the cargo oil tanks is filled with oil, the solenoid valve of the ballast tank directly below the cargo oil tank is opened, and the air pump inflates the ballast tank to discharge the water in the ballast tank outward, and at the same time, the solenoid valve of the ballast tank directly below the cargo oil tank corresponding to the cargo oil tank on the other side of the cylindrical floating body is opened to allow external water to flow into the ballast tank to level the cylindrical floating body.

6. The top cover heating type floating production storage and offloading unit according to claim 5, characterized in that: The inflatable wiring pipe column extends upward through the dirty oil tank to above the main deck, and the multiple inflatable pumps are arranged on the main deck.

7. The top cover heating type floating production storage and offloading unit according to claim 6 is characterized in that: The number of cargo oil tanks and ballast tanks is 6 or 8 respectively.

8. The top cover heating type floating production storage and offloading unit according to claim 7 is characterized in that: A spare oil pipe joint is provided on the cavity top cover, and the spare oil pipe joint is connected with the spare oil guide pipe in the cargo oil tank. A mobile spare cargo oil pump is provided on the main deck. When the cargo oil pump in the cavity top cover of a cargo oil tank fails, the mobile spare cargo oil pump is temporarily connected to the spare oil pipe joint, so that the mobile spare cargo oil pump temporarily replaces the work of the cargo oil pump.

9. The top cover heating type floating production storage and offloading unit according to claim 8, characterized in that: Each of the cargo oil tanks is equipped with three tank cleaning machines, which use heated cargo oil to clean the cargo oil tanks, or use heated production water or seawater to clean the cargo oil tanks when it is necessary to enter the cargo oil tanks for inspection or maintenance.

10. The top cover heating type floating production storage and offloading unit according to claim 9, characterized in that: The cargo oil pump adopts 500m 3 / h long shaft variable frequency cargo oil pump.

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