CN113123313A

CN113123313A - Offshore self-elevating ocean engineering drilling platform

Info

Publication number: CN113123313A
Application number: CN202110406730.1A
Authority: CN
Inventors: 郑金梅; 余晶晶; 杨小青
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-07-16

Abstract

The invention relates to the technical field of ocean engineering, in particular to an offshore self-elevating ocean engineering drilling platform. The drilling platform comprises a drilling platform body, wherein the drilling platform body comprises a platform support plate and floating boxes arranged on two sides of the bottom of the platform support plate, a connecting ring fixedly connected with the floating boxes in an inserting mode is arranged at the bottoms of the stand columns, stand columns are arranged between the two sides of the floating boxes and the platform support plate, and a self-elevating floating device is arranged at the top of each floating box and between the four stand columns. According to the invention, the contact area of the bottom of the platform support plate and seawater is increased through the overturning of the floating plate, so that the floating treatment of the platform support plate is realized, the larger the overturning angle of the floating plate is, the larger the increased area is, the larger the increased buoyancy is under the condition of no horizontal state, and the problem that the buoyancy of the bottom of the platform support plate cannot be increased when the height of the platform support plate is reduced is solved.

Description

Offshore self-elevating ocean engineering drilling platform

Technical Field

The invention relates to the technical field of ocean engineering, in particular to an offshore self-elevating ocean engineering drilling platform.

Background

Nowadays, with the improvement to resource demand right, improve the utilization ratio to ocean resource simultaneously, lead to like this that the development of resource is moved towards by land gradually still to make ocean engineering increase by a wide margin, wherein:

the ocean engineering refers to new construction, reconstruction and extension engineering which aims at developing, utilizing, protecting and recovering ocean resources and is characterized in that an engineering main body is positioned on one side of a coastline towards the sea.

Generally, in the process of ocean engineering development, a drilling platform is required to be used for developing offshore resources, a semi-submersible platform is usually adopted, the semi-submersible platform is matched with a buoyancy tank at the bottom to position the semi-submersible platform through an anchor, but because equipment at the tops of different platforms in working environments is often not uniform in weight and the depths of water areas in offshore areas are different, the height of the platform is reduced due to the fact that the buoyancy tank is insufficient, and the buoyancy tank at the bottom of the platform cannot increase buoyancy after the platform is reduced, and therefore the platform is very dangerous in the using process.

Disclosure of Invention

The present invention is directed to an offshore jack-up offshore drilling rig to solve the above problems.

In order to achieve the above object, a self-elevating ocean engineering drilling platform for offshore use is provided, which includes a drilling platform body, the drilling platform body includes a platform support plate and buoyancy tanks disposed on two sides of the bottom of the platform support plate, the bottoms of the columns are provided with connecting rings fixedly connected with the buoyancy tanks in an inserting manner, columns are disposed between two sides of the buoyancy tanks and the platform support plate, a self-elevating floating increasing device is disposed at a position between the four columns at the top of the buoyancy tank, and the self-elevating floating increasing device at least includes:

the self-lifting plate is movably connected with mounting plates at four corners, the mounting plates are fixedly connected with the stand columns, guide grooves are formed in the outer sides of the mounting plates, sliding blocks are fixed at positions, corresponding to the guide grooves, of the outer sides of the self-lifting plate, an assembling plate fixedly connected with the self-lifting plate is arranged at a position, corresponding to the sliding blocks, of the specific self-lifting plate, preferably, the assembling plate and the sliding blocks are fixed through bolts, and the sliding blocks are connected with the guide grooves in a sliding mode;

the connecting plate, the connecting plate setting is kept away from in one side of board from rising of mounting panel, and the top of connecting plate rotates with the mounting panel to be connected, and the top of concrete connecting plate is equipped with the adapter rack, and adapter rack and mounting panel outer wall fixed connection to pass through the hinge rotation with the connecting plate and be connected, be equipped with the piece that contracts that rises between connecting plate bottom and the slider, lie in addition and be equipped with between two connecting plates with one side and increase the kickboard, increase the kickboard and be used for forming flip structure with the connecting plate and the cooperation of the piece that contracts.

It is worth explaining that the telescopic piece specifically comprises a lower sliding column and an upper sliding column arranged at the top of the lower sliding column and connected with the lower sliding column in a sliding manner, so that a telescopic structure is formed by matching the upper sliding column and the lower sliding column, adapter plates are arranged at the end parts of the upper sliding column and the lower sliding column, the upper sliding column is rotatably connected with a connecting plate through the adapter plates at the end parts of the upper sliding column and the lower sliding column, the adapter plates at the end parts of the lower sliding column are rotatably connected with a sliding block, and the upper sliding column and the lower sliding column are fixedly connected through a connecting spring.

As a further improvement of the technical scheme, two limit wheels are arranged on two sides of the sliding block and are rotatably connected with the sliding block, a limit cavity for limiting the sliding block is formed between the two limit wheels on the same side, and the outer wall of the specific limit wheel is attached to the outer wall of the mounting plate, so that the sliding block is limited through the resistance effect of the limit cavity between the two limit wheels on the same side.

As a further improvement of the technical scheme, an auxiliary frame is arranged on one side, close to the stand column, of the self-lifting plate, an auxiliary wheel is connected to the outer side of the auxiliary frame in a rotating mode, specifically, the auxiliary frame and the auxiliary wheel are connected in a rotating mode through a hinged shaft, and the outer wall of the auxiliary wheel is attached to the outer wall of the stand column.

As a further improvement of the technical scheme, air bags are arranged at the top and the bottom of the self-lifting plate and are fixedly connected with the self-lifting plate.

As a further improvement of the technical scheme, one side of the mounting plate is bent outwards to form an L-shaped right-angle structure, and the bent part of the mounting plate is in inserted fit with the upright column and is used for fixing the mounting plate.

As a further improvement of the technical scheme, an embedded groove is formed in the position, corresponding to the bending part of the mounting plate, of the top of the platform supporting plate, a limiting column is inserted in the embedded groove, the limiting column further penetrates through the platform supporting plate and the top wall of the stand column to be connected with the bending part of the mounting plate in an inserting mode, and a baffle is fixedly connected to the top of the embedded groove and used for limiting the limiting column.

As a further improvement of the technical scheme, the top and the bottom of the inner wall of the guide groove are both provided with buffering parts, each buffering part comprises a buffering plate, both sides of the bottom of each buffering plate are both provided with buffering seats connected with the buffering plates in a sliding mode, and the buffering seats are internally provided with buffering springs.

As a further improvement of the technical scheme, a negative pressure plate is arranged at the top of the buffer plate and is of an arc-shaped structure.

As a further improvement of the technical scheme, the bottom of the floating plate is fixedly connected with an expanding panel, and the length of the expanding panel is smaller than the distance between the two connecting plates on the same side.

As a further improvement of the technical scheme, the floating plate is a wavy plastic air bag.

Compared with the prior art, the invention has the beneficial effects that:

1. this offshore is with raising formula ocean engineering drilling platform, the area of contact of upset increase platform extension board bottom and sea water through increasing the kickboard, thereby realized increasing the superficial processing to the platform extension board, and increase the kickboard and just also big the area that the angle of upset under the horizontally condition does not increase greatly, the buoyancy of increase is just also big, and then solved when platform extension board height descends, can't increase the problem of platform extension board bottom buoyancy, in addition the top and the bottom of self-rising board all are equipped with the gasbag, and gasbag and self-rising board fixed connection, the buoyancy from kickboard self has been increased through the gasbag, thereby also can increase the buoyancy effect of platform extension board bottom when self-rising board and sea water contact back.

2. In the offshore self-elevating ocean engineering drilling platform, the area of the floating plate is increased through the expansion panel, the buoyancy generated by the overturning floating plate is increased, and the bottom space of the floating plate is utilized.

3. In the offshore self-elevating ocean engineering drilling platform, the floating plate is a wavy plastic air bag, so that the shape of the floating plate is changed in different states of the same space, and the problem of increasing the contact area of the floating plate in the same space is solved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is an exploded view of the self-elevating floatation means structure of the present invention;

FIG. 4 is a schematic view of a slider structure according to the present invention;

fig. 5 is a schematic view of a self-elevating plate structure of the present invention;

FIG. 6 is a cross-sectional view of a platform plate and column construction of the present invention;

FIG. 7 is a schematic view of the structure of the lifting and retracting member of the present invention;

FIG. 8 is a schematic view of the mounting plate structure of the present invention;

FIG. 9 is a schematic view of a buffer structure according to the present invention;

FIG. 10 is a schematic view of a floating plate according to the present invention;

FIG. 11 is a second schematic view of the floating plate structure of the present invention;

FIG. 12 is a third schematic view of the floating plate structure of the present invention;

FIG. 13 is a side view of the drilling platform body structure of the present invention;

FIG. 14 is a side view of the drilling platform body structure of the present invention.

The various reference numbers in the figures mean:

100. a drilling platform body;

110. a platform support plate; 111. a groove is embedded; 1111. a baffle plate; 112. a limiting column;

120. a column; 121. a connecting ring; 130. a buoyancy tank;

200. a self-elevating buoyancy increasing device;

210. a self-lifting plate; 211. assembling a plate; 212. an air bag; 213. an auxiliary frame; 2131. an auxiliary wheel;

220. mounting a plate; 221. a guide groove; 222. a buffer member; 2221. a buffer plate; 2222. a buffer spring; 2223. a buffer seat; 2224. a negative pressure plate;

230. a connecting plate; 231. a transfer rack; 232. a floating plate; 2321. expanding a panel;

240. a lifting and shrinking piece; 241. a lower sliding column; 242. an upper sliding column; 243. a connecting spring; 244. an adapter plate;

250. a slider; 251. and a limiting wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

Referring to fig. 1-3, an object of the present embodiment is to provide an offshore self-elevating offshore drilling platform, which includes a drilling platform body 100, where the drilling platform body 100 includes a platform support plate 110 and buoyancy tanks 130 disposed on two sides of the bottom of the platform support plate 110, a connection ring 121 connected to the buoyancy tanks 130 is disposed at the bottom of the columns 120, the columns 120 are disposed between two sides of the buoyancy tanks 130 and the platform support plate 110, a self-elevating buoyancy increasing device 200 is disposed at a position between the four columns 120 at the top of the buoyancy tanks 130, and the self-elevating buoyancy increasing device 200 at least includes:

the self-elevating plate 210 is movably connected with mounting plates 220 at four corners of the self-elevating plate 210, the mounting plates 220 are fixedly connected with the upright posts 120, guide grooves 221 are formed in the outer sides of the mounting plates 220, sliders 250 are fixed at positions, corresponding to the guide grooves 221, of the outer sides of the self-elevating plate 210, and an assembling plate 211 fixedly connected with the self-elevating plate 210 is arranged at a position, corresponding to the sliders 250, of each slider 250, preferably, the assembling plate 211 and the sliders 250 are fixed through bolts, and the sliders 250 are slidably connected with the guide grooves 221;

the connecting plate 230, the connecting plate 230 is disposed on one side of the mounting plate 220 away from the self-lifting plate 210, preferably, bolts are used for connection, the top of the connecting plate 230 is rotatably connected with the mounting plate 220, the top of the connecting plate 230 is provided with an adapter 231, the adapter 231 is fixedly connected with the outer wall of the mounting plate 220 and rotatably connected with the connecting plate 230 through a hinge shaft, a lifting piece 240 is disposed between the bottom of the connecting plate 230 and the slider 250, and a floating plate 232 is disposed between the two connecting plates 230 on the same side and used for being matched with the connecting plate 230 and the lifting piece 240 to form a reversible structure.

It should be noted that, as shown in fig. 7, the telescopic element 240 specifically includes a lower sliding column 241 and an upper sliding column 242 disposed at the top thereof and slidably connected to the lower sliding column 241, so as to form a telescopic structure by matching the upper sliding column 242 with the lower sliding column 241, in addition, the end portions of the upper sliding column 242 and the lower sliding column 241 are both provided with an adapter plate 244, the upper sliding column 242 is rotatably connected to the connecting plate 230 by the adapter plate 244 at the end portion thereof, the adapter plate 244 at the end portion of the lower sliding column 241 is rotatably connected to the slider 250, and the upper sliding column 242 and the lower sliding column 241 are fixedly connected by a connecting spring 243, so as to improve the connecting strength between the upper sliding column 242 and the lower sliding column 241 by the elastic force of the connecting spring 243, and meanwhile, when the self-elevating plate 210 is shaken by waves, the connecting spring 243 plays a certain buffering role, so as to protect the upper sliding column 242 and the lower sliding column 241, and improve the.

In this embodiment, the buoyancy tank 130 is sufficient to enable the platform support plate 110 to float above the sea water, and the self-elevating plate 210 is not influenced by the buoyancy of the sea water, as shown in fig. 13, the lower sliding column 241, the upper sliding column 242, and the buoyancy increasing plate 232 are all located on the same horizontal plane (i.e., the lower sliding column 241, the upper sliding column 242, and the buoyancy increasing plate 232 are all perpendicular to the buoyancy tank 130).

Example 2

In order to perform the buoyancy increasing treatment (i.e. increase the buoyancy of the seawater to the bottom of the platform support plate 110) when the platform support plate 110 floats above the seawater and descends, the present embodiment is different from embodiment 1, please refer to fig. 10 and fig. 14, wherein the self-elevating plate 210 is subjected to the buoyancy of the seawater, and when in specific use:

the self-lifting plate 210 is acted by seawater buoyancy to drive the sliding block 250 to lift, the sliding block 250 drives the upper sliding column 242 and the lower sliding column 241 to rotate in the lifting process, the switching point at the top of the connecting plate 230 is fixed, so that when the sliding block 250 lifts, the distance between the switching point of the sliding block 250 and the lower sliding column 241 and the switching point at the top of the connecting plate 230 is gradually reduced, the connecting plate 230 drives the floating increasing plate 232 to turn outwards, the upper sliding column 242 and the lower sliding column 241 extend outwards gradually in the turning process, the contact area between the bottom of the platform support plate 110 and the seawater is increased through the turning of the floating increasing plate 232, the floating increasing treatment of the platform support plate 110 is realized, the larger the area of the turning angle of the floating increasing plate 232 is, the larger the increased buoyancy is, and the problem that the buoyancy at the bottom of the platform support plate 110 cannot be increased when the platform support plate 110 is lowered in height is solved, in addition, the top and the bottom of the self-elevating plate 210 are both provided with air bags 212, the air bags 212 are fixedly connected with the self-elevating plate 210, the self buoyancy of the self-elevating plate 210 is increased through the air bags 212, and therefore the buoyancy effect of the bottom of the platform support plate 110 can be increased after the self-elevating plate 210 is contacted with seawater.

Example 3

In order to improve the stability of the sliding block 250 sliding along the guiding groove 221 and ensure that the sliding block 250 can be limited, the embodiment is different from embodiment 2 in that please refer to fig. 4, wherein:

the both sides of slider 250 all are equipped with two spacing wheels 251, spacing wheel 251 rotates with slider 250 to be connected, and lie in and form one between two spacing wheels 251 with one side and carry out spacing cavity to slider 250, the outer wall and the mounting panel 220 outer wall laminating of specific spacing wheel 251, thereby the resistance effect through spacing cavity between two spacing wheels 251 with one side carries on spacingly to slider 250, simultaneously through spacing wheel 251 and the laminating of guide way 221 outer wall, the stability of slider 250 removal in-process atress has been improved, thereby the atress unstability leads to taking place the problem of shake when having solved slider 250 and slided along guide way 221, still solved because of long-time shake to slider 250 lateral wall and the also very big problem of guide way 221 inner wall damage.

Example 4

In order to increase the force bearing point of the outer side of the self-lifting plate 210, the present embodiment is different from embodiment 2, please refer to fig. 5, in which:

an auxiliary frame 213 is arranged on one side of the self-lifting plate 210 close to the upright post 120, an auxiliary wheel 2131 is rotatably connected to the outer side of the auxiliary frame 213, specifically, the auxiliary frame 213 is rotatably connected with the auxiliary wheel 2131 through a hinge shaft, the outer wall of the auxiliary wheel 2131 is attached to the outer wall of the upright post 120, so that the outer side of the self-lifting plate 210 is supported through the auxiliary wheel 2131 to provide a stress point, the stability of the self-lifting plate 210 during longitudinal movement is improved, the abrasion of the self-lifting plate during movement is reduced in a rolling manner, and the service life of the self-lifting plate 210 is prolonged.

Example 5

In order to solve the problem that the bolt is easily exposed to the outer wall and contacted with seawater when connecting the mounting plate 220 to the bolt, and the bolt is oxidized and rusted after being contacted for a long time, the embodiment is different from embodiment 1 in that please refer to fig. 6, wherein:

one side of mounting panel 220 outwards buckles and forms the right angle structure of "L" shape, the kink of mounting panel 220 and stand 120 are pegged graft the cooperation for fixed to mounting panel 220, specifically, embedded groove 111 has been seted up to the position that the top of platform extension board 110 corresponds the mounting panel 220 kink, it has spacing post 112 to peg graft in the embedded groove 111, spacing post 112 still passes platform extension board 110 and stand 120 roof and pegs graft with the mounting panel 220 kink, the top fixedly connected with baffle 1111 of embedded groove 111 in addition, be used for spacing post 112.

Insert the mounting panel 220 in stand 120 during the use, in pegging graft fixedly, to inserting spacing post 112 in embedded groove 111, make spacing post 112 imbed to embedded groove 111 in, with the roughness of improvement platform extension board 110 top surface, then, fix baffle 1111 on the interior edge of embedded groove 111 top reservation through the bolt, thereby stop spacing post 112, and then buckle the stability that the part is pegged graft and is improved mounting panel 220 and be connected through spacing post 112 and mounting panel 220, set up the bolt at platform extension board 110 top simultaneously, make it not contact with the sea water, solve for a long time and the rusty problem of sea water contact meeting oxidation.

Example 6

In order to buffer the impact force generated by the movement of the sliding block 250, the embodiment is different from embodiment 2, please refer to fig. 8 and 9, wherein:

the top and the bottom of the inner wall of the guide groove 221 are both provided with a buffer member 222, the buffer member 222 comprises a buffer plate 2221, two sides of the bottom of the buffer plate 2221 are both provided with a buffer seat 2223 connected with the buffer plate in a sliding manner, and a buffer spring 2222 is arranged inside the buffer seat 2223, when the slider 250 moves in the guide groove 221 during use, the slider will be in contact with the buffer plate 2221 when being in contact with the end part of the guide groove 221, and the slider is buffered through the elastic action generated by the buffer spring 2222 after being in contact with the guide groove, so that the impact force generated by the slider 250 on the guide groove 221 is reduced, and the slider is protected.

Still further, the top of buffer board 2221 is equipped with negative pressure plate 2224, and negative pressure plate 2224 is the arc structure, improves buffer board 2221's load-carrying capacity through the arching effect that the arc structure produced.

Example 7

In order to utilize the space at the bottom of the floating plate 232, the present embodiment is different from embodiment 2 in that please refer to fig. 11, in which:

the bottom of the floating augmentation plate 232 is fixedly connected with a floating augmentation plate 2321, and the length of the floating augmentation plate 2321 is smaller than the distance between the two connecting plates 230 on the same side, so that the area of the floating augmentation plate 232 is increased through the floating augmentation plate 2321, the buoyancy generated by the floating augmentation plate 232 after overturning is increased, and the bottom space of the floating augmentation plate 232 is utilized.

Example 8

In order to increase the contact area between the floating plate 232 and the seawater in the same space, the difference between the embodiment and the embodiment 2 is shown in fig. 12, in which:

the floating plate 232 is a wavy plastic air bag, so that after the floating plate 232 is turned over by the plastic air bag, the wavy part is extruded by seawater and extends outwards, buoyancy generated by contact of the plastic air bag and the seawater is increased, the original shape is kept under the action of elasticity of the floating plate 232 after the floating plate 232 is reset, and the change of the shape of the floating plate 232 is realized under different states of the same space.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an offshore is with lift-off ocean engineering drilling platform, includes drilling platform body (100), drilling platform body (100) include platform extension board (110) and set up flotation tank (130) in platform extension board (110) bottom both sides, stand (120) bottom is equipped with in addition and pegs graft fixed go-between (121) with flotation tank (130), is equipped with stand (120) between the both sides of flotation tank (130) and platform extension board (110), its characterized in that: the top of the buoyancy tank (130) is provided with a self-elevating buoyancy increasing device (200) at a position between the four columns (120), and the self-elevating buoyancy increasing device (200) at least comprises:

the self-lifting plate comprises a self-lifting plate (210), wherein mounting plates (220) are movably connected to four corners of the self-lifting plate (210), the mounting plates (220) are fixedly connected with the upright columns (120), guide grooves (221) are formed in the outer sides of the mounting plates (220), sliding blocks (250) are fixed on the outer sides of the self-lifting plate (210) corresponding to the guide grooves (221), and the sliding blocks (250) are connected with the guide grooves (221) in a sliding mode;

the connecting plate (230), the connecting plate (230) sets up the one side of keeping away from rising board (210) in mounting panel (220), and the top and mounting panel (220) of connecting plate (230) rotate and are connected, be equipped with between connecting plate (230) bottom and slider (250) and rise piece (240), be located in addition and be equipped with between two connecting plates (230) of the same side and increase floating plate (232), increase floating plate (232) and be used for forming reversible structure with connecting plate (230) and rise piece (240) cooperation.

2. The offshore jack-up offshore construction rig of claim 1, wherein: two sides of the sliding block (250) are respectively provided with two limiting wheels (251), the limiting wheels (251) are rotatably connected with the sliding block (250), and a limiting cavity for limiting the sliding block (250) is formed between the two limiting wheels (251) positioned on the same side.

3. The offshore jack-up offshore construction rig of claim 1, wherein: an auxiliary frame (213) is arranged on one side, close to the upright post (120), of the self-lifting plate (210), an auxiliary wheel (2131) is rotatably connected to the outer side of the auxiliary frame (213), and the outer wall of the auxiliary wheel (2131) is attached to the outer wall of the upright post (120).

4. The offshore jack-up offshore construction rig of claim 3, wherein: the top and the bottom of the self-lifting plate (210) are both provided with air bags (212), and the air bags (212) are fixedly connected with the self-lifting plate (210).

5. The offshore jack-up offshore construction rig of claim 1, wherein: one side of the mounting plate (220) is bent outwards to form an L-shaped right-angle structure, and the bent part of the mounting plate (220) is in plug-in fit with the upright post (120) and is used for fixing the mounting plate (220).

6. The offshore jack-up offshore construction rig of claim 5, wherein: the top of platform extension board (110) corresponds the position of mounting panel (220) bending part and has seted up embedded groove (111), and it has spacing post (112) to peg graft in embedded groove (111), and spacing post (112) still pass platform extension board (110) and stand (120) roof and mounting panel (220) bending part grafting, and top fixedly connected with baffle (1111) of embedded groove (111) is used for spacing post (112) in addition.

7. The offshore jack-up offshore construction rig of claim 1, wherein: the top and the bottom of the inner wall of guide way (221) all are equipped with bolster (222), bolster (222) include buffer board (2221), and the bottom both sides of buffer board (2221) all are equipped with rather than sliding connection's buffer seat (2223), and buffer seat (2223) inside is equipped with buffer spring (2222).

8. The offshore jack-up ocean engineering rig of claim 7, wherein: the top of buffer board (2221) is equipped with negative pressure board (2224), and negative pressure board (2224) are the arc structure.

9. The offshore jack-up offshore construction rig of claim 1, wherein: the bottom of the floating plate (232) is fixedly connected with a widening plate (2321), and the length of the widening plate (2321) is smaller than the distance between the two connecting plates (230) on the same side.

10. The offshore jack-up offshore construction rig of claim 1, wherein: the floating plate (232) is a wave-shaped plastic air bag.