A marine FPSO offloading motion compensation device and compensation method

Abstract

The application relates to the technical field of offshore engineering devices, in particular to an offshore FPSO oil unloading motion compensation device and a compensation method. The device comprises a barge assembly, a plate-leaf regulating mechanism arranged in the barge assembly and a plurality of groups of floating-increasing and stabilizing mechanisms installed on the plate-leaf regulating mechanism, and the plurality of groups of floating-increasing and stabilizing mechanisms are located in the barge assembly. The barge assembly comprises a ship body and a compression-resistant bow head installed at the bow end of the ship body, and a plurality of uniformly-distributed limiting grooves are arranged in the interior of the ship body. The two sides of the bottom of the ship body and the compression-resistant bow head are enlarged in a streamline shape, the uniformly-distributed limiting grooves are arranged on the two sides of the bottom of the ship body, the multiple reinforcing plate leaves are preassembled on the inner sides of the multiple limiting grooves, the multiple reinforcing plate leaves are stretched outwards from the limiting grooves after the ship body is parallel moored, the effective buoyancy of the two sides of the ship body is enhanced, the impact force of wind and waves on the two sides of the ship body is reduced, and the stability of the ship body after mooring is improved.

Description

Technical Field

[0001] This invention relates to the field of marine engineering equipment technology, specifically to a marine FPSO unloading motion compensation device and compensation method. Background Technology

[0002] An FPSO (Floating Production Station) is a vessel that integrates oil and gas processing, storage and transportation, and living and power supply. It features strong resistance to wind and waves, adaptability to deep water, and reusability, and is widely used in offshore and marginal oil field development. It receives crude oil through subsea pipelines, processes and stores it, and then transfers it to tankers via an external transportation system. The system covers four major modules: mooring, carrier, process, and external transportation.

[0003] When FPSOs and offshore carrier platforms are engaged in export operations at sea, they need to be moored side by side until they are in the same stable state to ensure the safety of crude oil export operations. However, FPSOs are large and are affected by wind and waves. The large size of the FPSO can pull on the mooring cables, which can cause deviations in the mooring points between the FPSO and the offshore carrier platform. In severe cases, this can lead to collisions, making it difficult to guarantee the safety of offshore export operations.

[0004] In view of this, a compensation device and method for the unloading motion of offshore FPSOs were designed to solve the above problems. Summary of the Invention

[0005] Therefore, the technical solution adopted in this invention is as follows:

[0006] A motion compensation device for unloading oil on a marine FPSO includes a barge assembly, a blade control mechanism disposed within the barge assembly, and multiple sets of buoyancy enhancement and stabilization mechanisms mounted on the blade control mechanism, wherein the multiple sets of buoyancy enhancement and stabilization mechanisms are located within the barge assembly; the barge assembly includes a hull and a pressure-resistant bow mounted at the bow end of the hull, and the hull has multiple evenly distributed limiting grooves inside, and a pre-installation hole is provided at the bottom of the hull; the blade control mechanism includes a pressure-resistant sleeve installed inside the pre-installation hole, two limiting beams fixedly installed on both sides of the inner cavity of the pressure-resistant sleeve, and a reinforcing rod installed... In the middle of the inner cavity of the pressure-resistant sleeve, the sliding sleeve is movably installed outside the reinforcing rod, the first extrusion head is fixedly installed at one end of the sliding sleeve, the lever arm is fixedly installed at the other end of the sliding sleeve, two sets of clamps are fixedly installed inside the hull, the hydraulic components are installed inside the two sets of clamps, the chuck is fixedly installed on the hydraulic sub-rod inside the hydraulic components, and the chuck is movably installed at the top of the lever arm; the buoyancy-enhancing and stabilizing mechanism includes a pressure-bearing component movably installed outside the limiting beam rod, the reinforcing plate is fixedly installed at the outer end of the pressure-bearing component, and the pressure-bearing component is located inside the limiting groove, while the inner end of the pressure-bearing component is adapted to bear pressure on the first extrusion head.

[0007] In a preferred embodiment, the present invention may be further configured as follows: the blade adjustment mechanism further includes a housing installed inside the pressure-resistant bow, a motor fixedly installed inside the housing, a drive gear fixedly installed on the motor, two clamping plates fixedly installed at the bottom of the inner cavity of the pressure-resistant sleeve, and a horizontally placed auxiliary lead screw movably installed inside the two clamping plates;

[0008] The auxiliary lead screw is externally fixed with multiple sets of evenly distributed pads, and a second compression head is provided between two adjacent pads.

[0009] In a preferred embodiment, the present invention may be further configured such that: an auxiliary gear is installed on the external thread of the auxiliary lead screw, and a chain is connected to the auxiliary gear and the drive gear for transmission;

[0010] The top of the pressure-resistant sleeve near the drive gear has a vertical hole, and the chain fits through the vertical hole.

[0011] In a preferred embodiment, the present invention may be further configured such that a reinforcing base is fixedly installed at the bottom of the pressure-resistant sleeve;

[0012] The bottom of the reinforcing plate is fixedly installed with an arc rail, and the arc rail has an arc-shaped groove inside. The arc rail is movably installed on the rod segment inside the reinforcing base.

[0013] In a preferred embodiment, the present invention may be further configured such that: a triangular pad is provided at the top of the first extrusion head for expanding the two pressure-bearing components at equal angles; and two symmetrically distributed oblique pads are provided on the side of the second extrusion head facing the arc rail for resetting the two pressure-bearing components.

[0014] In a preferred embodiment, the present invention can be further configured such that: symmetrically distributed insertion holes are provided on both sides of the outer side of the pressure-resistant sleeve, and the pressure-bearing component is adapted to penetrate into the insertion holes.

[0015] In a preferred embodiment, the present invention can be further configured such that: a plurality of pressure-reducing grooves are evenly distributed inside the reinforcing plate blade, a float is fixedly installed on the inner side of the reinforcing plate blade, and an oblique blade is fixedly installed in the middle of the inner side of the pressure-reducing groove.

[0016] In a preferred embodiment, the present invention can be further configured such that: the inside of the float has a hollow cavity, and the float is movably installed inside the limiting groove to provide anti-detachment support for the reinforcing plate blade.

[0017] In a preferred embodiment, the present invention can be further configured such that: the pressure-bearing member is welded from a fan-shaped end and a rectangular end plate, and the rectangular end plate has an internal shaft hole, and the limiting beam rod is adapted to pass through the shaft hole.

[0018] A compensation method for a motion compensation device during oil unloading at an offshore FPSO, the compensation method being as follows:

[0019] The control module operates multiple evenly distributed hydraulic components. In areas with large amplitude vibration at the bottom of the ship, the hydraulic components in operation extend their internal hydraulic rods outward, which pushes the lever arm and the sliding sleeve to slide along the reinforcing rod. The first extrusion head, which is fixedly installed on the sliding sleeve, extrudes two adjacent pressure-bearing components until the adjacent ends of the two pressure-bearing components are extruded outward by the inclined surface of the first extrusion head. The combined two sets of arc rails and reinforcing plate blades will then flip outward around the shaft hole as the axis.

[0020] After the FPSO capsizes, the two reinforcing blades will increase the buoyancy strength on both sides of the bottom of the hull. The seawater flowing along the hull and the outside of the pressure-resistant bow will flow along the reinforcing blades and be output outward at constant pressure through the decompression groove. The seawater passing through the decompression groove will be discharged outward through the multiple inclined blades in the tilted state. At this time, the seawater will flow at low pressure along the bottom of the ship. The FPSOs that are side by side can be stabilized and protected, reducing the abnormal movement amplitude caused by wind and waves in the sea area.

[0021] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0022] 1. This invention streamlines and expands the sides of the hull and the bottom of the pressure-resistant bow, and opens evenly distributed and impermeable limiting grooves on both sides of the bottom of the hull. Multiple evenly distributed reinforcing plates are pre-installed on the inner side of multiple limiting grooves. When the hulls are moored side by side, the multiple reinforcing plates extending outward from the limiting grooves will enhance the effective buoyancy on both sides of the hull, while reducing the impact of wind and waves on both sides of the hull and improving the stability of the hull after mooring.

[0023] 2. This invention creates uniformly distributed pressure relief grooves inside the reinforcing blades and fixes oblique blades inside the pressure relief grooves. Since the oblique blades transfer wind and waves from both sides of the hull outward, the FPSOs moored side by side can guide the eddies and waves at both ends of the hull, thereby reducing the hull's swaying on the sea surface and reducing abnormal pulling on the mooring cables and FPSOs after mooring.

[0024] 3. This invention selectively extends multiple uniformly distributed reinforcing blades at gradually varying angles according to the overall streamline shape of the hull and the pressure-resistant bow, until the multiple uniformly distributed reinforcing blades maintain consistency with the curvature of the hull, thereby ensuring the speed at which the hull moors towards the top mooring position and enhancing the efficiency of hull deceleration. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the front of the invention;

[0026] Figure 2 This is a schematic diagram illustrating the use of the present invention;

[0027] Figure 3 This is an exploded view of the barge assembly of the present invention;

[0028] Figure 4 This is a partial schematic diagram of the present invention;

[0029] Figure 5 This is an assembly diagram of the blade adjustment mechanism and the buoyancy-enhancing and stabilizing mechanism of the present invention;

[0030] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0031] Figure 7 This is an exploded view of the buoyancy-enhancing and stabilizing mechanism of the present invention;

[0032] Figure 8 This is an exploded view of the blade control mechanism of the present invention.

[0033] Figure label:

[0034] 100. Barge assembly; 110. Hull; 120. Pressure-resistant bow; 130. Limiting groove; 140. Pre-installation hole;

[0035] 200. Blade control mechanism; 210. Pressure-resistant sleeve; 2101. Reinforcing base; 2102. Clamping plate; 2103. Auxiliary lead screw; 2104. Auxiliary gear; 2105. Shim; 220. Limiting beam rod; 230. Chassis; 2301. Motor; 2302. Drive gear; 240. Chain; 250. Clamp; 2501. Hydraulic component; 2502. Chuck; 2503. Lever arm; 2504. Sliding sleeve; 260. First extrusion head; 270. Second extrusion head; 280. Reinforcing rod;

[0036] 300. Buoyancy-enhancing and stabilizing mechanism; 310. Arc rail; 320. Reinforcing plate blade; 3201. Pressure-reducing groove; 330. Pressure-bearing component; 3301. Shaft hole; 340. Float; 350. Slanted blade. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0038] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0039] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a marine FPSO unloading motion compensation device and compensation method. Example 1

[0040] Combination Figures 1 to 8 As shown, the present invention provides a motion compensation device and method for offshore FPSO unloading, comprising a barge assembly 100, a blade control mechanism 200 disposed within the barge assembly 100, and multiple sets of buoyancy enhancement and stabilization mechanisms 300 mounted on the blade control mechanism 200. The multiple sets of buoyancy enhancement and stabilization mechanisms 300 are located within the barge assembly 100. The barge assembly 100 provides pre-installed support for the blade control mechanism 200. The blade control mechanism 200, disposed within the barge assembly 100, provides auxiliary bearing for the multiple sets of buoyancy enhancement and stabilization mechanisms 300. The multiple sets of buoyancy enhancement and stabilization mechanisms 300 enhance the buoyancy of the barge assembly 100 on the sea surface and improve the stability of the barge assembly 100's floating.

[0041] The barge assembly 100 includes a hull 110 and a pressure-resistant bow 120 installed at the bow end of the hull 110. The hull 110 has multiple evenly distributed limiting grooves 130 inside, and a pre-installed hole 140 is provided at the bottom of the hull 110.

[0042] The blade control mechanism 200 includes a pressure-resistant sleeve 210 installed inside the pre-installation hole 140, two limiting beams 220 fixedly installed on both sides of the inner cavity of the pressure-resistant sleeve 210, a reinforcing rod 280 installed in the middle of the inner cavity of the pressure-resistant sleeve 210, a sliding sleeve 2504 movably installed outside the reinforcing rod 280, a first extrusion head 260 fixedly installed at one end of the sliding sleeve 2504, a lever arm 2503 fixedly installed at the other end of the sliding sleeve 2504, two sets of clamps 250 fixedly installed inside the hull 110, a hydraulic component 2501 installed inside the two sets of clamps 250, a chuck 2502 fixedly installed on the hydraulic sub-rod inside the hydraulic component 2501, and the chuck 2502 movably installed at the top of the lever arm 2503;

[0043] The buoyancy adjustment mechanism 300 includes a pressure-bearing component 330 movably installed outside the limiting beam 220, a reinforcing plate 320 fixedly installed on the outer end of the pressure-bearing component 330, and the pressure-bearing component 330 is located inside the limiting groove 130. The inner end of the pressure-bearing component 330 is adapted to bear pressure on the first extrusion head 260, and a float 340 is fixedly installed on the inner side of the reinforcing plate 320.

[0044] A reinforcing base 2101 is fixedly installed at the bottom of the pressure-resistant sleeve 210;

[0045] The bottom of the reinforcing plate blade 320 is fixedly installed with an arc rail 310, and the arc rail 310 has an arc-shaped sliding groove inside, and the arc rail 310 is movably installed on the rod segment inside the reinforcing base 2101.

[0046] The top of the first extrusion head 260 is provided with a triangular pad for expanding the two pressure-bearing components 330 at equal angles. The second extrusion head 270 is provided with two symmetrically distributed oblique pads on the side facing the arc rail 310 for resetting the two pressure-bearing components 330.

[0047] When the barge assembly 100 is on the sea and needs to be moored alongside the offshore carrier platform, in order to improve the accuracy of the barge assembly 100 at the selected mooring point, the hydraulic component 2501 is operated until its internal hydraulic sub-rod, in conjunction with the clamp 2502, pushes the lever arm 2503 to move laterally. The horizontally placed sliding sleeve 2504, which is fixedly installed at the bottom of the lever arm 2503, will drive the first extrusion head 260 to approach the two pressure bearing components 330 until the two pressure bearing components 330 are continuously extruded by the first extrusion head 260, causing the two pressure bearing components 330 to flip outward around the two limiting beams 220 as the axis. Then, the reinforcing plate blades 320 installed on the pressure bearing components 330 will be slowly released outward along the inside of the limiting groove 130 until the evenly distributed multiple reinforcing plate blades 320 pressurize and guide the wind and waves in the direction of the bow 120's travel.

[0048] By adjusting the angle of multiple buoyancy-enhancing and stabilizing mechanisms 300 from the pressure-resistant bow 120 to the stern according to the deceleration requirements of the hull 110's direction of travel, the speed of the barge assembly 100 is rapidly reduced. By controlling the outward expansion of the reinforcing blades 320 at different positions on the hull, the slow-moving hull 110 and pressure-resistant bow 120 can be micro-angled with the assistance of the reinforcing blades 320 at their corresponding external positions. After slowly expanding the multiple buoyancy-enhancing and stabilizing mechanisms 300 to improve the deceleration effect of the hull 110 until the hull 110 comes to a complete stop, the multiple buoyancy-enhancing and stabilizing mechanisms 300 will be fully extended, enhancing the stability of the bottom of the hull 110 floating on the sea surface, thereby improving the accuracy of the barge assembly 100's adjustment towards the selected mooring point. Example 2

[0049] Combination Figures 6 to 8 As shown, based on Embodiment 1, the blade control mechanism 200 also includes a housing 230 installed inside the pressure-resistant bow 120, a motor 2301 fixedly installed inside the housing 230, a drive gear 2302 fixedly installed on the motor 2301, two clamping plates 2102 fixedly installed at the bottom of the inner cavity of the pressure-resistant sleeve 210, and a horizontally placed auxiliary lead screw 2103 movably installed inside the two clamping plates 2102;

[0050] Multiple sets of evenly distributed gaskets 2105 are fixedly installed on the outside of the auxiliary lead screw 2103, and a second extrusion head 270 is provided between two adjacent gaskets 2105.

[0051] The auxiliary lead screw 2103 is threaded with an auxiliary gear 2104, and the auxiliary gear 2104 and the drive gear 2302 are connected by a chain 240.

[0052] A vertical hole is provided at the top of the pressure-resistant sleeve 210 near the drive gear 2302, and the chain 240 is adapted to pass through the vertical hole.

[0053] Preferably, the chassis 230 is pre-installed inside the pressure-resistant bow 120, and the motor 2301 is installed inside the chassis 230 and electrically connected to the motor 2301 through the power supply module. The two clamping plates 2102 are welded to the bottom of the inner cavity of the pressure-resistant sleeve 210, and the auxiliary gear 2104 is installed in the two clamping plates 2102 through two bearings.

[0054] Among them, the threaded rod segment provided on the auxiliary lead screw 2103 is movably installed inside the auxiliary gear 2104, and one end of the auxiliary lead screw 2103 that passes through the outside of the auxiliary gear 2104 is adapted to pass through the outside of the pressure-resistant sleeve 210, and both ends of the pressure-resistant sleeve 210 are closed structures.

[0055] In addition, the top of the pressure-resistant sleeve 210 is provided with multiple equally spaced slides, and the lever arm 2503 is movably installed in the slides. Example 3

[0056] Combination Figures 3 to 7 As shown, in the above embodiment, symmetrically distributed insertion holes are provided on both sides of the outer side of the pressure-resistant sleeve 210, and the pressure-bearing member 330 is adapted to penetrate into the insertion holes.

[0057] The interior of the reinforcing blade 320 has multiple pressure-reducing grooves 3201 evenly distributed, and a slanted blade 350 is fixedly installed in the middle of the inner side of the pressure-reducing groove 3201.

[0058] The float 340 has a hollow cavity inside, and the float 340 is movably installed inside the limiting groove 130 to provide anti-detachment support for the reinforcing plate blade 320;

[0059] The pressure-bearing component 330 is welded from a fan-shaped end and a rectangular end plate, and the rectangular end plate has a shaft hole 3301 inside, and the limiting beam 220 is adapted to pass through the shaft hole 3301.

[0060] Preferably, the surfaces of the reinforcing blade 320 and the pontoon 340 are coated with an anti-rust paint layer, and the outer wall of the reinforcing blade 320 is adapted and aligned with the port on the outside of the limiting groove 130. The oblique blade 350 is fixedly installed in the middle of the inner side of the pressure relief groove 3201 by pre-welding, and the oblique blade 350 has an outward oblique opening at the end away from the pressure-resistant bow 120 to reduce the impact of wind and waves on the bottom side of the hull 110 and improve the stability of the barge assembly 100 floating.

[0061] The working principle and usage process of this invention: When the vessel enters the sea area and needs to carry out export operations, the FPSO vessel and the offshore transport platform are parallel and connected together by mooring cables.

[0062] In maritime areas, ships are prone to high-volume movements due to wind and waves. To enhance the stability of FPSO vessels when they are parallel to offshore carrier platforms and reduce the interference of wind and waves on the parallel FPSO, multiple hydraulic components 2501 are operated by the control module. For areas with large amplitude of bottom vibration, the hydraulic components 2501 in operation extend their internal hydraulic rods outward, which pushes the lever arm 2503 and the sliding sleeve 2504 to slide along the reinforcing rod 280. The first extrusion head 260, which is fixedly installed on the sliding sleeve 2504, extrudes two adjacent pressure-bearing components 330 until the adjacent ends of the two pressure-bearing components 330 are extruded outward by the inclined surface of the first extrusion head 260. The combined two sets of arc rails 310 and reinforcing plate blades 320 will then flip outward with the shaft hole 3301 as the axis.

[0063] The two reinforcing blades 320 after the capsizing will increase the buoyancy strength on both sides of the bottom of the hull 110. The seawater flowing along the outside of the hull 110 and the pressure-resistant bow 120 will flow along the reinforcing blades 320 and be output outward at constant pressure through the decompression tank 3201. The seawater passing through the decompression tank 3201 will be discharged outward through the multiple inclined blades 350 in the tilted state. At this time, the seawater will flow at low pressure along the bottom of the ship. The FPSOs that are side by side can be stabilized and protected, reducing the abnormal movement amplitude caused by wind and waves in the sea area to the FPSO.

[0064] At the same time, the bottom of the hull 110 and the pressure-resistant bow 120 widens in a streamlined shape on both sides facing the waves. The multiple reinforcing blades 320, which are symmetrically distributed after the expansion, are pulled by multiple hydraulic components 2501 until the multiple reinforcing blades 320 are gradually extended outward at a certain angle. Finally, the multiple reinforcing blades 320 that are gradually extended outward can enhance the stability of the FPSO bottom in wind and waves, and at the same time can avoid the problem of abnormal misalignment of the mooring caused by the eddies around the FPSO after they are parallel.

[0065] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A marine FPSO unloading motion compensation device, comprising a barge assembly (100), characterized in that, It also includes a blade control mechanism (200) installed in the barge assembly (100) and multiple buoyancy enhancement and stabilization mechanisms (300) installed on the blade control mechanism (200), and the multiple buoyancy enhancement and stabilization mechanisms (300) are located in the barge assembly (100); The barge assembly (100) includes a hull (110) and a pressure-resistant bow (120) installed at the bow end of the hull (110). The hull (110) has multiple evenly distributed limiting grooves (130) inside, and a pre-installed hole (140) is provided at the bottom of the hull (110). The blade adjustment mechanism (200) includes a pressure-resistant sleeve (210) installed inside the pre-installed hole (140), two limiting beams (220) fixedly installed on both sides of the inner cavity of the pressure-resistant sleeve (210), a reinforcing rod (280) installed in the middle of the inner cavity of the pressure-resistant sleeve (210), a sliding sleeve (2504) movably installed outside the reinforcing rod (280), a first extrusion head (260) fixedly installed at one end of the sliding sleeve (2504), a lever arm (2503) fixedly installed at the other end of the sliding sleeve (2504), two sets of clamps (250) fixedly installed inside the hull (110), a hydraulic component (2501) installed inside the two sets of clamps (250), a chuck (2502) fixedly installed on the hydraulic sub-rod inside the hydraulic component (2501), and the chuck (2502) movably installed at the top of the lever arm (2503); The buoyancy adjustment mechanism (300) includes a pressure-bearing component (330) movably installed outside the limiting beam (220), a reinforcing plate (320) fixedly installed on the outer end of the pressure-bearing component (330), and the pressure-bearing component (330) is located inside the limiting groove (130), while the inner end of the pressure-bearing component (330) is adapted to bear pressure on the first extrusion head (260).

2. The offshore FPSO unloading motion compensation device according to claim 1, characterized in that, The blade adjustment mechanism (200) also includes a housing (230) installed inside the pressure-resistant bow (120), a motor (2301) fixedly installed inside the housing (230), a drive gear (2302) fixedly installed on the motor (2301), two clamping plates (2102) fixedly installed at the bottom of the inner cavity of the pressure-resistant sleeve (210), and a horizontally placed auxiliary lead screw (2103) movably installed inside the two clamping plates (2102). The auxiliary lead screw (2103) is externally fixed with multiple sets of evenly distributed gaskets (2105), and a second extrusion head (270) is provided between two adjacent gaskets (2105).

3. The offshore FPSO unloading motion compensation device according to claim 2, characterized in that, The auxiliary lead screw (2103) is threaded with an auxiliary gear (2104), and a chain (240) is connected to the auxiliary gear (2104) and the drive gear (2302). The top of the pressure-resistant sleeve (210) near the drive gear (2302) has a vertical hole, and the chain (240) is adapted to pass through the vertical hole.

4. A marine FPSO unloading motion compensation device according to claim 2, characterized in that, A reinforcing base (2101) is fixedly installed at the bottom of the pressure-resistant sleeve (210). The bottom of the reinforcing plate (320) is fixedly installed with an arc rail (310), and the arc rail (310) has an arc-shaped sliding groove inside, and the arc rail (310) is movably installed on the rod segment inside the reinforcing base (2101); The second extrusion head (270) has two symmetrically distributed oblique pads on the side facing the arc rail (310) for resetting the two pressure-bearing components (330).

5. A marine FPSO unloading motion compensation device according to claim 1, characterized in that, The top of the first extrusion head (260) is provided with a triangular pad for expanding the two pressure-bearing components (330) at equal angles.

6. A marine FPSO unloading motion compensation device according to claim 4, characterized in that, The pressure-resistant sleeve (210) has symmetrically distributed insertion holes on both sides of its exterior, and the pressure-bearing component (330) is adapted to penetrate into the insertion holes.

7. A marine FPSO unloading motion compensation device according to claim 1, characterized in that, The interior of the reinforcing plate (320) is provided with a plurality of pressure relief grooves (3201) evenly distributed, and a float (340) is fixedly installed on the inner side of the reinforcing plate (320), and a slanted blade (350) is fixedly installed in the middle of the inner side of the pressure relief groove (3201).

8. A marine FPSO unloading motion compensation device according to claim 7, characterized in that, The float (340) has a hollow cavity inside, and the float (340) is movably installed inside the limiting groove (130) to provide anti-detachment support for the reinforcing plate blade (320).

9. A marine FPSO unloading motion compensation device according to claim 1, characterized in that, The pressure-bearing component (330) is welded from a fan-shaped end and a rectangular end plate, and the rectangular end plate has a shaft hole (3301) inside, and the limiting beam rod (220) is adapted to pass through the shaft hole (3301).

10. A compensation method for a marine FPSO unloading motion compensation device according to any one of claims 1-9, characterized in that, The compensation method is as follows: By operating multiple evenly distributed hydraulic components (2501) through the control module, for areas with large amplitude vibration at the bottom of the ship, the hydraulic components (2501) in operation will push the lever arm (2503) and the sliding sleeve (2504) to slide along the reinforcing rod (280) when the internal hydraulic rod extends outward. The first extrusion head (260) fixedly installed on the sliding sleeve (2504) will extrude two adjacent pressure-bearing components (330) until the adjacent ends of the two pressure-bearing components (330) are extruded outward by the inclined surface of the first extrusion head (260). The combined two sets of arc rails (310) and reinforcing plate blades (320) will then turn outward around the shaft hole (3301) as the axis. After the capsizing, the two reinforcing blades (320) will increase the buoyancy strength on both sides of the bottom of the hull (110). The seawater flowing along the outside of the hull (110) and the pressure-resistant bow (120) will flow along the reinforcing blades (320) and be output outward at constant pressure through the decompression tank (3201). The seawater passing through the decompression tank (3201) will be discharged outward through the multiple inclined blades (350) in the tilted state. At this time, the seawater will flow at low pressure along the bottom of the ship, and the FPSO after being parallel can be stabilized and protected, reducing the abnormal movement amplitude caused by wind and waves in the sea area to the FPSO ship.

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