Buoyancy auxiliary protection device for underwater oil extraction production

Abstract

The invention discloses a buoyancy auxiliary protection device for underwater oil extraction production, and belongs to the technical field of buoyancy auxiliary protection devices.The buoyancy auxiliary protection device for underwater oil extraction production comprises a first floating body mechanism, two protection mechanisms and a threaded barrel, and the first floating body mechanism is connected with a second floating body mechanism; two butt joint grooves are formed in the end face of the first floating body mechanism, two butt joint blocks are arranged on the end face of the second floating body mechanism, two short lead screws are arranged on the inner wall of the threaded barrel, the two short lead screws are both connected with long plates, and two embedded blocks are arranged on the end faces of the two long plates. Foamed aluminum has the characteristics of metal and foam and is light, high in specific strength, high in rigidity, good in energy absorbability, resistant to high temperature, non-combustible, resistant to corrosion and recoverable, the movable plate can drive the extension plate to stretch out of the interior of the bottom groove to enter seawater, and therefore the buoyancy tank can be placed in the seawater more stably.

Description

Technical Field

[0001] This invention relates to the field of buoyancy-assisted protection devices, and more specifically, to a buoyancy-assisted protection device for underwater oil production. Background Technology

[0002] Subsea production systems are core equipment for deep-sea oil and gas development, including heavy equipment such as well trees, manifolds, and distribution units. The installation, positioning, and long-term stability of these devices face enormous challenges. Traditional buoyancy aids often employ synthetic foam (such as polyurethane or polystyrene foam) or composite material pressure shells with built-in lightweight buoyancy materials.

[0003] Synthetic foam materials have significant drawbacks under deep-water and high-pressure conditions: compressive strength and buoyancy coefficient are mutually restrictive, and high-buoyancy materials often have low strength and are prone to creep or compression failure; the material is brittle and has poor impact resistance, making it easy to break during installation or collision; long-term immersion may cause water absorption, leading to a decrease in buoyancy performance. To solve these problems, this application proposes a novel buoyancy auxiliary protection device for underwater oil production. Summary of the Invention

[0004] The purpose of this invention is to provide a buoyancy-assisted protection device for underwater oil production, in order to solve the problems mentioned in the background art: foamed aluminum has the characteristics of both metal and foam, is lightweight, has high specific strength, high rigidity, good energy absorption, high temperature resistance, is non-flammable, corrosion resistant, and recyclable. The stability of the pontoon in the sea is increased by the extension plate, and the impact of seawater is effectively reduced by the cooperation of the outer and inner protective plates.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A buoyancy-assisted protection device for underwater oil production includes a first floating body mechanism, two protective mechanisms, and a threaded cylinder. The first floating body mechanism is connected to a second floating body mechanism. The end face of the first floating body mechanism has two docking grooves. The end face of the second floating body mechanism is provided with two docking blocks. The inner wall of the threaded cylinder is provided with two short screws. Both short screws are connected to long plates. Both long plates are provided with two embedding blocks on their end faces. The first floating body mechanism includes a float box, a bladder and multiple partitions. The float box has a bottom groove on its end face. Two extension plates are arranged inside the bottom groove. Each of the two extension plates has a movable plate on its end face. A double-ended screw is arranged between the two movable plates. Each of the multiple partitions has a long tube inside. The two protective mechanisms include two outer protective frames and two inner protective frames. The inner walls of the two inner protective frames are provided with multiple frame blocks. The inner walls of the multiple frame blocks are provided with sliders. Multiple push springs are provided between the multiple sliders and the multiple frame blocks.

[0006] By adopting the above technical solution, the installation between the two floating body mechanisms is facilitated through the docking block and docking groove; The stability of the pontoon can be increased by using extension plates when it is placed in the sea; The combination of outer and inner protective plates effectively reduces the impact of seawater on the equipment.

[0007] Preferably, each of the two mating grooves has three signal connectors on its inner wall, each of the two mating blocks has three signal connection holes on its end face, the multiple signal connectors are respectively disposed inside the multiple signal connection holes, each of the two mating blocks has two embedding grooves on its end face, and the four embedding blocks are respectively disposed inside the four embedding grooves.

[0008] By adopting the above technical solution, when the docking block enters the docking groove, the signal connector will be inserted into the signal connection hole, thereby generating a signal connection between the two float mechanisms. Moreover, the cooperation between the embedding block and the embedding groove makes it easier to fix the float mechanisms together.

[0009] Preferably, each of the two mating grooves has two through holes on its inner wall, two long grooves are formed between the four through holes, a middle groove is formed between the two long grooves, the threaded cylinder is disposed inside the middle groove, the two long plates are disposed inside the two long grooves respectively, and the four embedded blocks are disposed inside the four through holes respectively.

[0010] By adopting the above technical solution, the threaded cylinder rotating inside the long groove will drive the short lead screw to move into the cylinder, so that the short lead screw will drive the long plate to move inside the long groove, allowing the long plate to drive the insert block to insert into the insert groove, thus facilitating the movement of the insert block.

[0011] Preferably, the inner wall of the middle groove is provided with an inner groove, a first motor is provided inside the inner groove, a main gear is provided at the output end of the first motor, a ring gear is provided at the end face of the threaded cylinder, and the main gear and the ring gear are meshed and connected.

[0012] By adopting the above technical solution, the first motor in the inner groove will drive the main gear to rotate, and the rotating main gear will drive the threaded cylinder to rotate through the ring gear, which facilitates the control of the short lead screw.

[0013] Preferably, the end face of the pontoon has two frame slots, each of which is equipped with a skeleton. The end face of the pontoon has two bottom blocks, and the end face of the pontoon has multiple hexagonal slots. The pontoon has floating grooves inside, and multiple partitions are arranged inside the floating grooves.

[0014] By adopting the above technical solution, other structures can be connected through the frame inside the trough, and the floating box can be lifted through the frame. The trough can be divided into different areas through the partitions, which facilitates separate control.

[0015] Preferably, each of the multiple long pipes is connected to a one-way valve, and the multiple one-way valves are connected by a pipe. The pipe is connected to a first pump body, and the bladder is connected to a second pump body. The inner wall of the bottom trough has an installation groove, and the bladder is disposed inside the installation groove. The inner wall of the installation groove has a pump groove, and the second pump body is disposed inside the pump groove. The inner wall of the float trough has a pipe groove, and the pipe, multiple one-way valves, and the first pump body are all disposed inside the pipe groove.

[0016] By adopting the above technical solution, when the extension plate is unfolded, the second pump body will inflate the inside of the bladder, allowing the bladder to fill the bottom trough and preventing seawater from entering the bottom trough. By cooperating with the first pump body and the one-way valve, the amount of air and seawater in different spaces inside the floating trough can be controlled, making it convenient to achieve different controls.

[0017] Preferably, the inner wall of the bottom groove is provided with a movable groove, the inner wall of the movable groove is provided with an upper groove, a second motor is provided inside the upper groove, a first pulley is provided at the output end of the second motor, a second pulley is provided at the end face of the double-ended lead screw, a belt is provided between the first pulley and the second pulley, two auxiliary rods are provided on the inner wall of the movable groove, both auxiliary rods are provided on the inner wall of the two movable plates, the double-ended lead screw is provided inside the movable groove, and both movable plates are provided inside the movable groove.

[0018] By adopting the above technical solution, the second motor is started to drive the first pulley to rotate. The rotating first pulley will drive the second pulley to rotate through the belt. The rotating second pulley will drive the double-ended lead screw to rotate. The rotating double-ended lead screw will drive the moving plate to move inside the moving groove, so that the moving plate can drive the extension plate to move inside the bottom groove. This facilitates the control of the unfolding of the extension plate. Moreover, the moving plate is assisted by the auxiliary rod during movement, making the moving plate more stable during movement.

[0019] Preferably, each of the two inner protective frames is provided with a plurality of upper support rods on its inner wall, each of the upper support rods has a hexagonal block on its end face, and each of the hexagonal blocks has a fixing bolt on its inner wall.

[0020] By adopting the above technical solution, when installing the protective mechanism, the hexagonal block is inserted into the hexagonal slot, and the fixing bolt is rotated to fix the hexagonal block. The hexagonal block supports and fixes the inner protective plate through the upper support rod.

[0021] Preferably, a contact plate is provided between the two outer protective frames and the two inner protective frames, and multiple lower support rods are provided on the inner walls of the two inner protective frames, with each of the multiple lower support rods connected to a support plate.

[0022] By adopting the above technical solution, the inner protective frame is supported on the end face of the pontoon by the support plate on the lower support rod, making the inner protective frame more stable and providing better protection.

[0023] Preferably, each of the multiple slider end faces is provided with two inclined plates, and each of the multiple slider end faces is provided with a connecting plate.

[0024] By adopting the above technical solution, the slide can be fixed to the inner protective frame through the inclined plate and connecting plate, so that a buffer zone can be formed between the inner and outer protective frames, making the float box more stable.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1) When this buoyancy-assisted protection device is in use, the float of the device is composed of two float mechanisms. The detachable floats are more convenient to stack and transport. The two float mechanisms are connected by a docking block and a docking groove. The docking block is inserted into the docking groove and the rotation of the threaded cylinder drives the short screw box cylinder to move inside, thereby driving the long plate to be fixed by the embedded block, making the fixation between the two float mechanisms more secure and convenient. The float box, outer protective frame and inner protective frame in this device are all made of foamed aluminum. Foamed aluminum is a new type of functional structure integrated material that combines metal aluminum with air bubbles. It has the characteristics of both metal and foam, and is lightweight, has high specific strength, high rigidity, good energy absorption, high temperature resistance, non-combustible, corrosion resistant and recyclable.

[0026] 2) When this buoyancy auxiliary protection device is in use, after the first float mechanism is placed in the sea, the double-ended screw is activated to drive the moving plate to move. The moving plate will drive the extension plate to extend from the bottom tank into the seawater, thereby increasing the contact area of ​​the bottom of the float box and making the float box more stable in the seawater.

[0027] 3) When this buoyancy-assisted protection device is in use, a protective mechanism is provided at the outer end of the float mechanism. The protective mechanism is divided into an outer protective frame and an inner protective frame. When seawater impacts the outer protective frame, the outer protective frame will drive the slider to slide inside the frame. The push spring between the slider and the frame will generate buffer, and the outer protective frame will float up and down, effectively reducing the damage to the device caused by seawater impact. Attached Figure Description

[0028] Figure 1 This is an isometric view of the present invention; Figure 2 This is a first axonometric schematic diagram of the first floating body mechanism of the present invention; Figure 3 This is a rear axial view of the first floating body mechanism of the present invention; Figure 4 This is an axial side view of the long plate of the present invention; Figure 5 This is an axonometric schematic diagram of the second floating body mechanism of the present invention; Figure 6 This is a second axial view of the first float mechanism of the present invention; Figure 7 This is an axial view of the frame groove of the present invention; Figure 8 This is a side sectional axial view of the pontoon of the present invention; Figure 9 This is a side sectional axial view of the floating trough of the present invention; Figure 10 This is an axial side view of the extension plate of the present invention; Figure 11 This is an axial view of the partition plate of the present invention; Figure 12 This is an axonometric schematic diagram of the protective mechanism of the present invention; Figure 13 This is an isometric view of the frame block of the present invention.

[0029] The following are the labeling instructions in the diagram: 1. First float mechanism; 2. Second float mechanism; 3. Protective mechanism; 4. Docking groove; 5. Signal connector; 6. Through hole; 7. Long groove; 8. Long plate; 9. Embedded block; 10. Short lead screw; 11. Middle groove; 12. First motor; 13. Inner groove; 14. Threaded cylinder; 15. Ring gear; 16. Main gear; 17. Docking block; 18. Signal connection hole; 19. Embedded groove; 101. Float box; 102. Bottom groove; 103. Mounting groove; 104. Frame groove; 105. Bottom block; 106. Floating groove; 107. Pipe groove; 108. Hexagonal groove; 109. Pump groove; 110. Moving groove; 111. Upper groove; 112. 113. Auxiliary rod; 114. Double-ended lead screw; 115. First pulley; 116. Pipe; 117. First pump body; 118. One-way valve; 119. Long pipe; 120. Partition plate; 121. Second pump body; 122. Bladder; 123. Extension plate; 124. Moving plate; 125. Second pulley; 126. Second motor; 127. Frame; 301. Outer protective frame; 302. Inner protective frame; 303. Contact plate; 304. Upper support rod; 305. Hexagonal block; 306. Fixing bolt; 307. Lower support rod; 308. Support plate; 309. Frame block; 310. Slider; 311. Inclined plate; 312. Connecting plate; 313. Push spring. Detailed Implementation

[0030] Example 1, please refer to Figures 1 to 5 A buoyancy-assisted protection device for underwater oil production includes a first float mechanism 1, two protective mechanisms 3, and a threaded cylinder 14. The first float mechanism 1 is connected to a second float mechanism 2. The end face of the first float mechanism 1 has two docking grooves 4. The end face of the second float mechanism 2 is provided with two docking blocks 17. The inner wall of the threaded cylinder 14 is provided with two short screws 10. Both short screws 10 are connected to long plates 8. The end faces of both long plates 8 are provided with two embedded blocks 9. The docking blocks 17 and docking grooves 4 facilitate the installation between the two float mechanisms.

[0031] Specifically, each of the two mating grooves 4 has three signal connectors 5 on its inner wall, each of the two mating blocks 17 has three signal connection holes 18 on its end face, and multiple signal connectors 5 are respectively located inside multiple signal connection holes 18. Each of the two mating blocks 17 has two embedded grooves 19 on its end face, and four embedded blocks 9 are respectively located inside the four embedded grooves 19. Each of the two mating grooves 4 has two through holes 6 on its inner wall, and two long grooves 7 are opened between the four through holes 6. A middle groove 11 is opened between the two long grooves 7, and a threaded cylinder 14 is located inside the middle groove 11. Two long plates 8 are respectively located inside the two long grooves 7, and four embedded blocks 9 are respectively located inside the four through holes 6. An inner groove 13 is opened on the inner wall of the middle groove 11, and a first motor 12 is installed inside the inner groove 13. A main gear 16 is installed at the output end of the first motor 12, and a ring gear 15 is installed on the end face of the threaded cylinder 14. The main gear 16 and the ring gear 15 are meshed and connected.

[0032] Furthermore, two docking slots 4 are respectively opened on both sides of the rear end face of the first float mechanism 1, two docking blocks 17 are respectively fixedly installed on both sides of the front end face of the second float mechanism 2, two short lead screws 10 are respectively threaded onto the upper and lower sides of the inner wall of the threaded cylinder 14, two short lead screws 10 are respectively fixedly installed at the middle of the opposite end face of the long plate 8, two embedding blocks 9 are respectively fixedly installed at both sides of the opposite end face of the two long plates 8, three signal connectors 5 are all fixedly installed at the middle of the front inner wall of the docking slot 4, and three signal connection holes 18 are all opened. At the middle position of the front end face of the mating block 17, two embedded grooves 19 are respectively opened at the middle position of the upper end face and the lower end face of the mating block 17. Two through holes 6 are respectively opened at the middle position of the inner bottom surface and the inner top surface of the two mating grooves 4. The long groove 7 is opened between the two bottom through holes 6. The middle groove 11 is opened at the middle position of the inner top surface of the long groove 7. The inner groove 13 is opened at the middle of the middle of the middle groove 11 near one side of the inner wall. The first motor 12 is fixedly installed on the inner bottom surface of the inner groove 13. The main gear 16 is rotatably installed on the inner top surface of the inner groove 13. The ring gear 15 is fixedly sleeved on the middle position of the outer end face of the threaded cylinder 14.

[0033] The steps of using this invention are as follows: When splicing two floating body mechanisms, insert the docking block 17 on the second floating body mechanism 2 into the docking groove 4 on the first floating body mechanism 1, insert the signal connector 5 into the signal connection hole 18, start the first motor 12 to drive the main gear 16 to rotate, the rotating main gear 16 will drive the threaded cylinder 14 to rotate through the ring gear 15, the rotating threaded cylinder 14 will drive the short lead screw 10 to move towards the middle of the threaded cylinder 14 through the thread, the short lead screw 10 pulls the long plate 8, the long plate 8 drives the embedded block 9 to slide out of the through hole 6 and into the embedded groove 19, thereby forming the fixation of the docking block 17, completing the splicing between the first floating body mechanism 1 and the second floating body mechanism 2, and the first floating body mechanism 1 and the second floating body mechanism 2 have the same structure.

[0034] Example 2, please refer to Figures 6 to 11 The difference from Embodiment 1 is that the first floating body mechanism 1 includes a float box 101, a bladder 121 and multiple partitions 119. The float box 101 has a bottom groove 102 on its end face. Two extension plates 122 are arranged inside the bottom groove 102. Each of the two extension plates 122 has a movable plate 123 on its end face. A double-ended screw 113 is arranged between the two movable plates 123. Each of the multiple partitions 119 has a long tube 118 inside. The stability of the float box 101 when placed in the sea is increased by the extension plates 122.

[0035] Specifically, the float box 101 has two support slots 104 on its end face, each containing a frame 126. The float box 101 also has two bottom blocks 105 on its end face, multiple hexagonal slots 108 on its end face, a float trough 106 inside the float box 101, multiple partitions 119 inside the float trough 106, multiple long pipes 118 connected to one-way valves 117, pipes 115 connecting the multiple one-way valves 117, pipes 115 connecting to a first pump body 116, a bladder 121 connected to a second pump body 120, an installation groove 103 on the inner wall of the bottom groove 102, a bladder 121 inside the installation groove 103, a pump groove 109 on the inner wall of the installation groove 103, and a second pump body 120 inside the pump groove 109. The inner wall of the floating trough 106 is provided with a pipe groove 107. The pipe 115, multiple one-way valves 117 and the first pump body 116 are all located inside the pipe groove 107. The inner wall of the bottom trough 102 is provided with a moving groove 110. The inner wall of the moving groove 110 is provided with an upper groove 111. The upper groove 111 is provided with a second motor 125. The output end of the second motor 125 is provided with a first pulley 114. The end face of the double-ended screw 113 is provided with a second pulley 124. A belt is provided between the first pulley 114 and the second pulley 124. The inner wall of the moving groove 110 is provided with two auxiliary rods 112. The two auxiliary rods 112 are both located inside the inner wall of two moving plates 123. The double-ended screw 113 is located inside the moving groove 110. The two moving plates 123 are both located inside the moving groove 110.

[0036] Furthermore, the bottom trough 102 is located on the lower side of the front end face of the pontoon 101. Two extension plates 122 are slidably disposed on the inner walls of the bottom trough 102 on both sides. Two movable plates 123 are fixedly disposed on the upper ends of the two extension plates 122 on opposite sides. A double-ended lead screw 113 is threaded into the middle of the inner wall of the movable plate 123. A long pipe 118 is fixedly disposed in the middle of the partition plate 119. Two frame slots 104 are located on the middle of the front end face of the pontoon 101 on both sides. Two frames 126 are fixedly disposed on the two... Inside the support slot 104, two bottom blocks 105 are fixedly installed on the front side of the lower end face of the float box 101, near both sides. Multiple hexagonal slots 108 are equidistantly opened on the outer side of the upper end face of the float box 101. A float trough 106 is opened inside the float box 101 near the center. Multiple partitions 119 are equidistantly fixed on the inner wall of the float trough 106. A one-way valve 117 is fixedly installed on the upper end face of the long pipe 118. A one-way valve 117 is fixedly installed on the lower end face of the pipe 115. The first pump body 116 is fixedly installed in the center of the upper end face of the pipe 115. The second pump body 12... The second pump body 120 is fixedly installed in the middle of the upper end face of the bladder 121. The mounting groove 103 is opened in the front side of the top surface of the bottom groove 102. The bladder 121 is fixedly installed inside the mounting groove 103. The pump groove 109 is opened in the middle of the top surface of the mounting groove 103. The second pump body 120 is fixedly installed inside the pump body. The pipe groove 107 connects the upper end face of the float box 101 and the float groove 106. The moving groove 110 is opened in the middle of the top surface of the bottom groove 102. The upper groove 111 is opened in the middle of the top surface of the moving groove 110. The second motor 125 is embedded in the pump body. On one side of the inner wall of the upper groove 111, the first pulley 114 is rotatably disposed inside the upper groove 111, the double-ended lead screw 113 is rotatably disposed in the middle position between the inner walls of both sides of the moving groove 110, the second pulley 124 is fixedly sleeved in the middle position of the outer end face of the double-ended lead screw 113, the two auxiliary rods 112 are respectively fixedly disposed in the front and rear positions between the inner walls of both sides of the moving groove 110, the two auxiliary rods 112 are respectively disposed in the front and rear inner walls of the two moving plates 123, and the two moving plates 123 are respectively slidably disposed in the inner walls of both sides of the two moving grooves 110.

[0037] The steps of using this invention are as follows: Place the pontoon 101 at sea, start the first pump 116 to draw air from the pipe 115, control the opening and closing of the long pipe 118 through the one-way valve 117 to control the amount of air inside the pontoon 106, and separate the pontoon 106 through the baffle 119 to reduce the amplitude of seawater sloshing and increase the stability of the pontoon 101. Start the second motor 125 to drive the first pulley 114 to rotate. The rotating first pulley 114 drives the second pulley 124 to rotate via a belt. The rotating second pulley 124 drives the double-ended lead screw 113 to rotate, and the rotating double-ended lead screw 113 drives the moving plate 123. The moving plate 123 moves inside the moving trough 110, while the moving plate 123 is assisted in moving by the auxiliary rod 112. The moving plate 123 will drive the extension plate 122 to move inside the bottom trough 102. At this time, the second pump body 120 is started simultaneously to fill the bladder 121 with water. The bladder 121 can fill the space left after the extension plate 122 moves, preventing seawater from entering the bottom trough 102. The extended extension plate 122 makes the float box 101 more stable. A frame groove 104 is opened at the outer end of the float box 101. A frame 126 is set inside the frame groove 104. The frame 126 can be connected to the external structure. Example 3, please refer to Figures 12 to 13 The difference from embodiment 2 is that the two protective mechanisms 3 include two outer protective frames 301 and two inner protective frames 302. The inner walls of the two inner protective frames 302 are provided with multiple frame blocks 309. The inner walls of the multiple frame blocks 309 are provided with sliders 310. Multiple push springs 313 are provided between the multiple sliders 310 and the multiple frame blocks 309. Through the cooperation of the outer protective plates and the inner protective plates, the impact of seawater on the device is effectively reduced.

[0038] Specifically, the inner walls of the two inner protective frames 302 are provided with multiple upper support rods 304, the end faces of the multiple upper support rods 304 are provided with hexagonal blocks 305, the inner walls of the multiple hexagonal blocks 305 are provided with fixing bolts 306, the two outer protective frames 301 and the two inner protective frames 302 are provided with contact plates 303, the inner walls of the two inner protective frames 302 are provided with multiple lower support rods 307, the multiple lower support rods 307 are connected to support plates 308, the end faces of the multiple sliders 310 are provided with two inclined plates 311, and the end faces of the multiple sliders 310 are provided with connecting plates 312.

[0039] Furthermore, multiple frame blocks 309 are equidistantly fixed at the lower side of the outer end face of the inner guard 302, and sliders 310 are slidably disposed on the inner wall of the frame blocks 309. Push springs 313 are fixed in pairs at the upper and lower sides between the sliders 310 and the frame blocks 309, respectively. Multiple upper support rods 304 are equidistantly fixed at the upper side of the inner wall of the inner guard 302. Hexagonal blocks 305 are fixedly connected to the upper support rods 304. Two contact plates 303 are respectively fixedly disposed on two outer guards 301 and two… On both sides of the inner guard 302, multiple lower support rods 307 are fixedly installed at equal intervals on the lower side of the inner wall of the inner guard plate. Two inclined plates 311 are fixedly installed on the upper and lower ends of the slider 310, respectively. Both inclined plates 311 are fixedly connected to the inner wall of the outer guard plate. A connecting plate 312 is fixedly installed in the middle of the end face of the slider 310 away from the frame block 309. The connecting plate 312 is fixedly installed on the inner wall of the outer guard 301. The fixing bolts 306 are threaded inside the hexagonal block 305.

[0040] The steps of using this invention are as follows: When installing the protective mechanism 3, insert the hexagonal block 305 on the upper support rod 304 into the hexagonal groove 108 above the float 101, and rotate the fixing bolt 306 to fix the hexagonal block 305. At this time, the support plate 308 is attached to the end face of the float 101. The support plate 308 is supported by the lower support rod 307. When the outer protective frame 301 is impacted, the outer protective frame 301 will move up and down in the frame block 309 with the slider 310. By pushing the spring 313 for buffering, the lateral force is converted into a vertical force, reducing the impact on the float 101.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A buoyancy-assisted protection device for subsea oil production, comprising a first buoy mechanism (1), two protective mechanisms (3), and a threaded cylinder (14), characterized in that: The first floating body mechanism (1) is connected to the second floating body mechanism (2). The end face of the first floating body mechanism (1) has two docking slots (4). The end face of the second floating body mechanism (2) is provided with two docking blocks (17). The inner wall of the threaded cylinder (14) is provided with two short screws (10). Both of the two short screws (10) are connected to long plates (8). The end faces of the two long plates (8) are provided with two embedded blocks (9). The first floating body mechanism (1) includes a float box (101), a bladder (121) and multiple partitions (119). The float box (101) has a bottom groove (102) on its end face. The bottom groove (102) is provided with two extension plates (122). The end faces of the two extension plates (122) are provided with movable plates (123). A double-ended screw (113) is provided between the two movable plates (123). The multiple partitions (119) are provided with long tubes (118). The two protective mechanisms (3) include two outer protective frames (301) and two inner protective frames (302). The inner walls of the two inner protective frames (302) are provided with multiple frame blocks (309). The inner walls of the multiple frame blocks (309) are provided with sliders (310). Multiple push springs (313) are provided between the multiple sliders (310) and the multiple frame blocks (309).

2. The buoyancy-assisted protection device for subsea oil production according to claim 1, characterized in that: The inner walls of the two docking slots (4) are provided with three signal connectors (5), the end faces of the two docking blocks (17) are provided with three signal connection holes (18), the multiple signal connectors (5) are respectively disposed inside the multiple signal connection holes (18), the end faces of the two docking blocks (17) are provided with two embedding slots (19), and the four embedding blocks (9) are respectively disposed inside the four embedding slots (19).

3. The buoyancy-assisted protection device for subsea oil production according to claim 2, characterized in that: Two through holes (6) are opened on the inner walls of the two docking grooves (4), two long grooves (7) are opened between the four through holes (6), a middle groove (11) is opened between the two long grooves (7), the threaded cylinder (14) is set inside the middle groove (11), the two long plates (8) are respectively set inside the two long grooves (7), and the four embedded blocks (9) are respectively set inside the four through holes (6).

4. The buoyancy-assisted protection device for subsea oil production according to claim 3, characterized in that: The inner wall of the middle groove (11) is provided with an inner groove (13), and a first motor (12) is provided inside the inner groove (13). A main gear (16) is provided at the output end of the first motor (12), and a ring gear (15) is provided on the end face of the threaded cylinder (14). The main gear (16) and the ring gear (15) are meshed and connected.

5. The buoyancy-assisted protection device for subsea oil production according to claim 4, characterized in that: The end face of the float box (101) has two frame slots (104), and each of the two frame slots (104) is provided with a frame (126). The end face of the float box (101) is provided with two bottom blocks (105). The end face of the float box (101) is provided with multiple hexagonal slots (108). The inside of the float box (101) is provided with a floating groove (106), and multiple partitions (119) are provided inside the floating groove (106).

6. The buoyancy-assisted protection device for subsea oil production according to claim 5, characterized in that: Multiple long pipes (118) are connected to one-way valves (117), and multiple one-way valves (117) are connected to pipes (115). The pipes (115) are connected to a first pump body (116), and the bladder (121) is connected to a second pump body (120). The inner wall of the bottom groove (102) is provided with an installation groove (103). The bladder (121) is located inside the installation groove (103). The inner wall of the installation groove (103) is provided with a pump groove (109). The second pump body (120) is located inside the pump groove (109). The inner wall of the float trough (106) is provided with a pipe groove (107). The pipes (115), multiple one-way valves (117) and the first pump body (116) are all located inside the pipe groove (107).

7. The buoyancy-assisted protection device for subsea oil production according to claim 6, characterized in that: The inner wall of the bottom groove (102) is provided with a moving groove (110), and the inner wall of the moving groove (110) is provided with an upper groove (111). The upper groove (111) is provided with a second motor (125). The output end of the second motor (125) is provided with a first pulley (114). The end face of the double-headed screw (113) is provided with a second pulley (124). A belt is provided between the first pulley (114) and the second pulley (124). The inner wall of the moving groove (110) is provided with two auxiliary rods (112). The two auxiliary rods (112) are both provided on the inner wall of the two moving plates (123). The double-headed screw (113) is provided inside the moving groove (110). The two moving plates (123) are both provided inside the moving groove (110).

8. The buoyancy-assisted protection device for subsea oil production according to claim 7, characterized in that: The inner walls of the two inner protective frames (302) are provided with multiple upper support rods (304), the end faces of the multiple upper support rods (304) are provided with hexagonal blocks (305), and the inner walls of the multiple hexagonal blocks (305) are provided with fixing bolts (306).

9. A buoyancy-assisted protection device for subsea oil production according to claim 8, characterized in that: A contact plate (303) is provided between the two outer protective frames (301) and the two inner protective frames (302). Multiple lower support rods (307) are provided on the inner walls of the two inner protective frames (302). Each of the multiple lower support rods (307) is connected to a support plate (308).

10. A buoyancy-assisted protection device for subsea oil production according to claim 9, characterized in that: Each of the multiple sliders (310) has two inclined plates (311) on its end face, and each of the multiple sliders (310) has a connecting plate (312) on its end face.

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