Semi-submersible floating platform anchor cable fixing system based on hydrate method
By forming CO2 hydrates in the seabed strata to enhance the stability of the seabed strata, the stability problem of the traditional anchor fixing system in complex environments is solved, and the stability of the semi-submersible floating platform and the storage of CO2 are achieved.
Patent Information
- Application Number
- CN202510914248.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2025-09-12
AI Technical Summary
Traditional anchor cable fixing systems are difficult to ensure long-term stability in complex and changeable marine environments, especially in semi-submersible floating platforms, where they cannot meet stability requirements. In addition, traditional fixing methods have stringent requirements on seabed geological conditions.
An anchor fixing system based on the hydrate method is adopted. By inserting rods and barbed anchors into the seabed formation, CO2 gas is used to form hydrates, enhance the cementation of the seabed formation, and combine temperature and pressure monitoring to achieve stability assessment and early warning.
It improves the stability and firmness of the anchor cable, combines engineering practicality with environmental benefits, realizes the long-term storage of CO2, and adapts to complex geological environments.
Smart Images
Figure CN120621571A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of energy mining, and in particular to an anchor cable fixing system for a semi-submersible floating platform based on a hydrate method. Background Art
[0002] In the fields of marine development and oil and gas exploration, semi-submersible floating platforms, with their exceptional stability and adaptability to deepwater environments, have become a cutting-edge focus in marine engineering research. However, the design and reliability of these platforms' anchoring systems remain a pressing technical bottleneck, especially in complex and volatile marine environments, where traditional anchoring systems face numerous challenges.
[0003] Traditional anchor cable fixing methods have extremely stringent requirements for seabed geological conditions and are difficult to ensure long-term stability in practical applications. The complex and changing geological conditions of the seabed environment make anchor cable fixing a complex and challenging process. In the field of semi-submersible wind power generation, anchor cable fixing is also subject to strict geological constraints, and traditional fixing methods cannot meet the long-term stability requirements.
[0004] Therefore, a semi-submersible floating platform anchor fixing system based on the hydrate method is proposed. Summary of the Invention
[0005] The purpose of the present invention is to provide a semi-submersible floating platform anchor cable fixing system based on the hydrate method, aiming to solve or improve at least one of the above-mentioned technical problems.
[0006] To achieve the above-mentioned objectives, the present invention provides the following solution: The present invention provides a semi-submersible floating platform anchor cable fixing system based on the hydrate method, comprising a plurality of anchor barb mechanisms, the plurality of said anchor barb mechanisms being arranged along the circumference of the semi-submersible platform, the said anchor barb mechanisms comprising a plunger connected to the semi-submersible platform, the said plunger being used to be inserted into the seabed formation, the sidewall of the plunger being circumferentially provided with a plurality of barbed anchors, the plurality of said barbed anchors being spread outwardly with the plunger as the center;
[0007] The semi-submersible platform is provided with an air supply mechanism, a cavity is provided in the barbed anchor, a plurality of barbed anchor holes are opened circumferentially on the side wall of the barbed anchor, the barbed anchor holes are connected to the cavity, and the air supply mechanism is used to supply CO2 into the cavity.
[0008] Preferably, the barbed anchor is rotatably connected to the side wall of the insertion rod, a tension spring is hinged between the barbed anchor and the side wall of the insertion rod, the tension spring is located above the barbed anchor, and the tension spring, the barbed anchor and the insertion rod form a triangular structure.
[0009] Preferably, the air supply mechanism includes an air supply component arranged on the semi-submersible platform, the air outlet end of the air supply component is connected to a plurality of air pipes, the plurality of air pipes are arranged in a one-to-one correspondence with the plurality of insertion rods, a connecting channel is provided in the insertion rod, and the air pipe is connected to the plurality of cavities through the connecting channel.
[0010] Preferably, the connecting channel includes a main channel opened at the top of the insertion rod, and a plurality of branch channels are opened on the insertion rod, and the plurality of branch channels are arranged in a one-to-one correspondence with the plurality of barbed anchors. The bottom of the gas pipe is sealed and inserted into the main channel, and a diversion pipe is passed through the branch channel, and the diversion pipe is fixedly connected to and connected with the gas pipe. The end of the diversion pipe away from the gas pipe passes through the side wall of the barbed anchor and extends into the cavity.
[0011] Preferably, the gas supply assembly includes a CO2 booster tank fixedly connected to the top of the semi-submersible platform, and the gas outlet end of the CO2 booster tank is connected to the gas pipeline.
[0012] Preferably, a motor is fixedly embedded in the bottom of the insertion rod, a drill bit is fixedly connected to the output shaft of the motor, and the drill bit is rotatably connected to the insertion rod.
[0013] Preferably, the top of the insertion rod is connected to the semi-submersible platform via a mooring rope, and the gas pipe is spirally wound outside the mooring rope.
[0014] Preferably, a temperature and pressure monitoring mechanism is also provided, which includes a controller, a temperature sensor and a pressure sensor. The controller is installed on the semi-submersible platform, and the temperature sensor and the pressure sensor are installed on the side wall of the rod. The temperature sensor and the pressure sensor are both electrically connected to the controller.
[0015] Preferably, a battery is provided on the semi-submersible platform, and the battery is electrically connected to the motor via a cable, and the cable is spirally wound outside the mooring rope.
[0016] The present invention discloses the following technical effects: the insertion rod and its barbed anchor are inserted into the seabed stratum for anchoring, so as to achieve the fixation of the semi-submersible platform; then, CO2 is supplied into the cavity through the air supply mechanism and flows out through the barbed anchor hole, thereby injecting CO2 into the seabed stratum around the anchor mechanism; during the CO2 injection process, hydrates are formed under the low temperature and high pressure conditions of the seabed, thereby achieving a cementing effect on the seabed stratum, thereby enhancing the mechanical strength of the seabed sediment and significantly improving the stability, making the anchor cable stronger and more stable, and at the same time achieving long-term storage of CO2 in the form of seabed hydrates, which has both engineering practicality and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:
[0018] Figure 1 It is a structural schematic diagram of the present invention;
[0019] Figure 2 It is a structural schematic diagram of the anchor mechanism in the present invention.
[0020] In the figure: 1. Semi-submersible platform; 2. Controller; 3. Battery; 4. CO2 booster tank; 5. Gas pipeline; 6. Rod; 7. Mooring rope; 8. Diverter pipe; 9. Anchor mechanism; 10. Back-pressure valve; 11. Pressure sensor; 12. Tensile spring; 13. Temperature sensor; 14. Anchor; 15. Motor; 16. Drill bit; 17. Anchor hole. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] Reference Figure 1-Figure 2 The present invention provides a semi-submersible floating platform anchor cable fixing system based on the hydrate method, comprising a plurality of anchor barb mechanisms 9, which are arranged along the circumference of the semi-submersible platform 1. The anchor barb mechanisms 9 include a plunger 6, which is connected to the semi-submersible platform 1 and is used to be inserted into the seabed formation. A plurality of barbed anchors 14 are arranged circumferentially on the side wall of the plunger 6, and the plurality of barbed anchors 14 are spread outward with the plunger 6 as the center.
[0024] The semi-submersible platform 1 is provided with an air supply mechanism, a cavity is provided in the barbed anchor 14, a plurality of barbed anchor holes 17 are opened circumferentially on the side wall of the barbed anchor 14, and the barbed anchor holes 17 are connected to the cavity. The air supply mechanism is used to supply CO2 into the cavity.
[0025] Furthermore, a wind power generation system is provided on the semi-submersible platform 1 , wherein at least two anchoring mechanisms 9 are provided, and at least two anchors 14 are provided around the insertion rod 6 for piercing the seabed formation.
[0026] The rod 6 and its barbed anchor 14 are inserted into the seabed stratum for anchoring, which is used to fix the semi-submersible platform 1. Then, CO2 is supplied into the cavity through the gas supply mechanism and flows out through the barbed anchor hole 17, thereby injecting CO2 into the seabed stratum around the anchor mechanism 9. During the CO2 injection process, hydrates are formed under the low temperature and high pressure conditions on the seabed, which achieves a cementing effect on the seabed stratum, thereby enhancing the mechanical strength of the seabed sediment and significantly improving the stability, making the anchor cable more solid and stable. At the same time, long-term storage of CO2 is achieved through the form of seabed hydrates, which has both engineering practicality and environmental benefits. The present invention combines carbon dioxide storage with anchor cable reinforcement technology, improves the mechanical properties of the soil through the hydrate cementation effect, and breaks through the strict geological conditions required by traditional anchor cable fixing systems.
[0027] In some optional embodiments, the barbed anchor 14 is rotatably connected to the side wall of the insertion rod 6, and a tensile spring 12 is hinged between the barbed anchor 14 and the side wall of the insertion rod 6. The tensile spring 12 is located above the barbed anchor 14, and the tensile spring 12, the barbed anchor 14 and the insertion rod 6 form a triangular structure.
[0028] When the rod 6 is inserted into the seabed formation, the barbed anchor 14 also penetrates the formation. When the semi-submersible platform 1 is affected by wind and waves, an upward lifting force is applied to the rod 6. At this time, the opening amplitude of the barbed anchor 14 increases, and as a barbed structure of the rod 6, it prevents the rod 6 from being pulled out of the formation, thereby improving the stability of the rod 6.
[0029] In some optional embodiments, the air supply mechanism includes an air supply assembly arranged on the semi-submersible platform 1, and the air outlet end of the air supply assembly is connected to multiple air pipes 5, and the multiple air pipes 5 are arranged in a one-to-one correspondence with multiple insertion rods 6. A connecting channel is provided in the insertion rod 6, and the air pipe 5 is connected to multiple cavities through the connecting channel.
[0030] In some optional embodiments, the connecting channel includes a main channel opened at the top of the insertion rod 6, and a plurality of branch channels are opened on the insertion rod 6. The plurality of branch channels are arranged in a one-to-one correspondence with the plurality of barbed anchors 14. The bottom of the gas pipe 5 is sealed and inserted into the main channel. A diversion pipe 8 is passed through the branch channel. The diversion pipe 8 is fixedly connected to and connected with the gas pipe 5. The end of the diversion pipe 8 away from the gas pipe 5 passes through the side wall of the barbed anchor 14 and extends into the cavity.
[0031] Furthermore, a back-pressure valve 10 is fixedly connected to the gas transmission pipe 5 .
[0032] In some optional embodiments, the gas supply assembly includes a CO2 booster tank 4 fixed to the top of the semi-submersible platform 1 , and the gas outlet end of the CO2 booster tank 4 is connected to the gas pipeline 5 .
[0033] In some optional embodiments, a motor 15 is fixedly embedded in the bottom of the insertion rod 6, a drill bit 16 is fixedly connected to the output shaft of the motor 15, and the drill bit 16 is rotatably connected to the insertion rod 6.
[0034] The motor 15 drives the drill bit 16 to rotate, thereby inserting the insertion rod 6 into the formation.
[0035] In some optional embodiments, the top of the insertion rod 6 is connected to the semi-submersible platform 1 via a mooring rope 7 , and the gas pipe 5 is spirally wound outside the mooring rope 7 .
[0036] By spirally winding the air pipe 5 , the stretching length of the air pipe 5 can be adjusted during the process of deploying the anchor mechanism 9 , and the possibility of the air pipe 5 being entangled and knotted can be reduced by spirally winding.
[0037] In some optional embodiments, a temperature and pressure monitoring mechanism is also provided, which includes a controller 2, a temperature sensor 13 and a pressure sensor 11. The controller 2 is installed on the semi-submersible platform 1, and the temperature sensor 13 and the pressure sensor 11 are installed on the side wall of the insertion rod 6. The temperature sensor 13 and the pressure sensor 11 are both electrically connected to the controller 2.
[0038] The temperature sensor 13 and the pressure sensor 11 are installed inside the insertion rod 6 with the detection end exposed, and are used to monitor the formation temperature and pressure and provide real-time feedback on the formation status.
[0039] In some optional embodiments, a battery 3 is provided on the semi-submersible platform 1 , and the battery 3 is electrically connected to the motor 15 via a cable, and the cable is spirally wound outside the mooring rope 7 .
[0040] In this embodiment, two batteries 3 are provided.
[0041] In some embodiments, in a water depth of 600m, the rod 6 is 5m long, the mooring rope 7 is 650m long, the components exposed to seawater are made of corrosion-resistant materials, the tensile spring is 120cm long, the retractable range is ±60cm, and it can withstand a peak tensile stress of 500KN. The monitoring range of the pressure sensor 11 is 0-20MPa, the sensitivity is 0.1MPa, and the tank volume of the CO2 booster tank 4 is 5m 3 The inner diameter of the gas transmission pipe 5 is 10 cm, the temperature sensor has a measurement range of -50℃ to 50℃, and the measurement accuracy is 0.1.
[0042] During use, the present invention uses a ship to transport the target semi-submersible platform 1 to a predetermined sea area. The semi-submersible platform 1 is assembled modularly, and the anchor mechanism 9 is deployed. A motor 15 is started, driving the anchor mechanism 9 into the seabed formation via a drill bit 16. Temperature and pressure data of the seabed formation are acquired via a temperature sensor 13 and a pressure sensor 11. A high-pressure CO2 injection system is then used to deliver gas to a CO2 booster tank 4, which is then delivered to the anchor hole 17 via a gas pipeline 5. This CO2 is then injected into the formation, promoting the formation of CO2 hydrates within the anchor mechanism 9 and surrounding formations. The temperature and pressure monitoring mechanism allows for remote, real-time tracking of the temperature and pressure parameters of the anchoring area. Based on this monitoring data, CO2 can be dynamically replenished or the drilling motor activated to maintain long-term stability.
[0043] Advantages of this application:
[0044] 1. Breaking through the stringent requirements of traditional anchoring structures for seabed geological conditions, the stability of the seabed stratum structure is enhanced by generating CO2 hydrate around the anchor barb mechanism 9, so that the anchoring system can still maintain reliable performance in complex geological environments.
[0045] 2. By monitoring the pressure and temperature information of the seabed formation, the stability conditions of hydrates can be judged in a timely manner, and the stability of the anchor fixing system can be evaluated and early warning can be carried out.
[0046] 3. Integrate carbon sequestration technology into the field of marine engineering, and achieve long-term storage of CO2 in the form of seabed hydrates, which combines engineering practicality with environmental benefits.
[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0048] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.
Claims
1. A semi-submersible floating platform anchor cable fixing system based on the hydrate method, characterized in that: The invention comprises a plurality of anchoring mechanisms (9), wherein the plurality of anchoring mechanisms (9) are arranged along the circumference of a semi-submersible platform (1), the anchoring mechanisms (9) include an insertion rod (6), the insertion rod (6) is connected to the semi-submersible platform (1), the insertion rod (6) is used to be inserted into the seabed formation, and a plurality of barbed anchors (14) are arranged circumferentially on the side wall of the insertion rod (6), and the plurality of barbed anchors (14) are spread outward with the insertion rod (6) as the center; The semi-submersible platform (1) is provided with an air supply mechanism, a cavity is provided in the barbed anchor (14), a plurality of barbed anchor holes (17) are circumferentially opened on the side wall of the barbed anchor (14), the barbed anchor holes (17) are communicated with the cavity, and the air supply mechanism is used to supply CO2 into the cavity.
2. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 1 is characterized in that: The barbed anchor (14) is rotatably connected to the side wall of the insertion rod (6); a tension spring (12) is hinged between the barbed anchor (14) and the side wall of the insertion rod (6); the tension spring (12) is located above the barbed anchor (14); and the tension spring (12), the barbed anchor (14) and the insertion rod (6) form a triangular structure.
3. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 1 is characterized in that: The air supply mechanism comprises an air supply assembly arranged on the semi-submersible platform (1); the air outlet end of the air supply assembly is connected to a plurality of air pipes (5); the plurality of air pipes (5) are arranged in a one-to-one correspondence with the plurality of insertion rods (6); a communication channel is provided in the insertion rod (6); the air pipe (5) is connected to the plurality of cavities through the communication channel.
4. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 3 is characterized in that: The communicating channel comprises a main channel opened at the top of the inserting rod (6), a plurality of branch channels are opened on the inserting rod (6), and the plurality of branch channels are arranged in a one-to-one correspondence with the plurality of barbed anchors (14). The bottom of the gas pipe (5) is sealed and inserted into the main channel, and a diversion pipe (8) is passed through the branch channel. The diversion pipe (8) is fixedly connected to and communicates with the gas pipe (5), and one end of the diversion pipe (8) away from the gas pipe (5) passes through the side wall of the barbed anchor (14) and extends into the cavity.
5. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 4 is characterized in that: The gas supply assembly comprises a CO2 booster tank (4) fixedly connected to the top of the semi-submersible platform (1), and the gas outlet end of the CO2 booster tank (4) is connected to the gas transmission pipe (5).
6. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 3 is characterized in that: A motor (15) is fixedly embedded in the bottom of the insertion rod (6), a drill bit (16) is fixedly connected to the output shaft of the motor (15), and the drill bit (16) is rotatably connected to the insertion rod (6).
7. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 6 is characterized in that: The top of the insertion rod (6) is connected to the semi-submersible platform (1) via a mooring rope (7), and the gas pipe (5) is spirally wound outside the mooring rope (7).
8. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 1 is characterized in that: A temperature and pressure monitoring mechanism is also provided, comprising a controller (2), a temperature sensor (13) and a pressure sensor (11); the controller (2) is mounted on the semi-submersible platform (1); the temperature sensor (13) and the pressure sensor (11) are mounted on the side wall of the plunger (6); and the temperature sensor (13) and the pressure sensor (11) are both electrically connected to the controller (2).
9. The anchor cable fixing system for a semi-submersible floating platform based on the hydrate method according to claim 7 is characterized in that: A battery (3) is provided on the semi-submersible platform (1), and the battery (3) is electrically connected to the motor (15) via a cable, and the cable is spirally wound outside the mooring rope (7).