CN114435552A - High-performance large three-upright-column semi-submersible type oil storage production platform - Google Patents
High-performance large three-upright-column semi-submersible type oil storage production platform Download PDFInfo
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- CN114435552A CN114435552A CN202011219003.6A CN202011219003A CN114435552A CN 114435552 A CN114435552 A CN 114435552A CN 202011219003 A CN202011219003 A CN 202011219003A CN 114435552 A CN114435552 A CN 114435552A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/442—Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies
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Abstract
The invention discloses a high-performance large-scale three-upright-column semi-submersible oil storage production platform, which comprises: the floating body comprises three equal-size upright columns and three equal-size watertight rectangular horizontal buoyancy tanks connected with the bottoms of the upright columns, an angle cabin is arranged at the included angle between every two adjacent buoyancy tanks to form a triangular annular lower floating body, watertight dry buoyancy tanks and an oil-water replacement wet oil storage device are arranged in the upright columns, a platform positioning mooring system is arranged on the upright columns, and a vertical pipe suspension device is arranged on the triangular annular lower floating body; the superstructure is equipped with crude oil export system including three upper portion module and three gallery bridge truss that constitute triangle-shaped superstructure structure on the module of an upper portion. The oil storage production platform has the advantages of simple ship shape, good stability and motion performance, high oil storage efficiency, good constructability and high safety, obviously improves the overall performance and the comprehensive load ratio of the semi-submersible oil storage production platform, and greatly improves the economy of the platform.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a high-performance large three-upright-column semi-submersible oil storage production platform.
Background
The deep water floating production platform is a main facility for deep water oil field development, and as one of typical floating platform concepts, the semi-submersible platform has a development process of over fifty years and is widely applied to ocean oil and gas development. With the expansion of ocean oil and gas development to the deep and distant sea areas, the semi-submersible production platform technology gradually develops from small single functions to multifunctional integrated comprehensive platforms, such as drilling and production, production and oil storage, drilling and production and oil storage, the requirement on the loading capacity of the platform is greatly improved, and the water discharge is also greatly increased.
For a large semi-submersible platform which simultaneously has 2 ten thousand tons of upper production facilities and 2 ten thousand square oil storage functions, the existing traditional four-upright semi-submersible ship type is adopted, and the designed water discharge is usually about 10 ten thousand tons. Although it has the advantages of mature technology, the disadvantages are large steel consumption, high construction and installation cost and insufficient motion performance; particularly, the butt joint integration of the 2-ten-thousand-ton ultra-large upper facility assembly module and the semi-submersible hull requires ultra-large hoisting equipment with 2-ten-thousand-ton hoisting capacity, the difficulty is high, the risk is high, and only few shipyards in the world can be built.
Chinese patent CN201610633132.7 proposes a light semi-submersible production platform with high effective load ratio, which adopts a three-column semi-submersible type ship, has good economy, and is suitable for medium and small-sized marginal oil fields, but has the disadvantages of no oil storage capacity, small effective load of upper facilities, and limited applicable water depth.
The payload ratio is an important measure of the floating production platform and is defined as the ratio of the payload weight of the upper facilities of the platform to the weight of the steel of the lower float. For a floating storage production platform, the combined load ratio is defined as the ratio of the upper facility weight of the platform plus the weight of the storage to the weight of the lower float steel. Under the same conditions, a higher integrated load ratio indicates a higher float efficiency of the floating platform and a better overall economy.
The oil-water replacement wet-type oil storage refers to that crude oil and ballast water are stored in the same oil storage tank, and according to the principle of physics, as the density of oil is lower than that of water, the oil and the water are not dissolved, an oil-water interface is naturally formed between the oil and the water to isolate the oil from the water, and the oil floats on the water. Dry oil storage usually separates oil and ballast water, so a ballast water tank with the same volume as oil storage is needed, the needed volume is twice of that of oil-water replacement wet oil storage, and the manufacturing cost of the whole oil storage device is greatly increased. The oil-water replacement oil storage can obviously reduce the oil storage cost, and can avoid the risk of combustion and explosion accidents possibly caused by volatilization of crude oil in the traditional dry oil storage. Since 1960 s, the technology is successfully applied to gulf of mexico, and is widely applied to various shallow water fixed platforms such as the bos gulf, the north sea, canada and the like, but the technology is not applied to a floating type deep water semi-submersible platform. The conventional dry oil storage is generally adopted by the existing large semi-submersible oil storage platform, and the cost is high.
In summary, there are many places to be improved in terms of effective load ratio, economy and motion performance of the conventional large-scale semi-submersible oil storage production platform, and it is necessary to develop a large-scale semi-submersible oil storage production platform with better economy and motion performance to meet the requirements of deep-water large-scale oil and gas field development.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. In view of the above, the invention needs to provide a high-performance large-scale three-upright-column semi-submersible oil storage production platform which is compact in ship shape, good in stability and motion performance, high in oil storage efficiency, good in constructability and high in safety, can obviously improve the overall performance and comprehensive load ratio of the semi-submersible oil storage production platform, and greatly improves the platform economy.
The invention provides a high-performance large-scale three-upright-column semi-submersible oil storage production platform, which comprises: the three-column type semi-submersible floating body is provided with a wet oil storage tank, a distributed superstructure which is positioned at the top end of the floating body, a heave suppression device which is positioned at the bottom of the floating body, and a column support rod and a column diagonal brace which are used for connecting the floating body with the superstructure, wherein the floating body comprises three watertight round vertical columns which have the same size and penetrate through the water surface and three watertight rectangular horizontal buoyancy tanks which have the same size and are connected with the bottoms of the columns correspondingly, an angle between two adjacent buoyancy tanks is provided with an angle cabin and forms a triangular annular lower floating body, a watertight dry buoyancy tank and an oil-water replacement wet oil storage device are arranged in the column, a platform positioning mooring system is arranged on the outer wall of the column, and a vertical pipe suspension device is arranged on the outer side of the triangular annular lower floating body; the superstructure includes upper portion module and the horizontal gallery bridge truss of rectangle, the upper portion module is three independent structure and arranges respectively in threely the top of stand, the gallery bridge truss is three and connects gradually threely along the clockwise the upper portion module to form triangle-shaped superstructure structure, one of them be equipped with crude oil defeated system outward on the module of upper portion.
According to one embodiment of the invention, the heave suppression device comprises three horizontal side heave plates and a horizontal middle heave plate, wherein the horizontal side heave plates are respectively connected with the outer side of the bottom of the triangular annular lower floating body, each horizontal side heave plate is of a rectangular continuous or discontinuous planar structure, each horizontal side heave plate extends from one end to the other end of the outer side of the bottom of the floating box, the horizontal side heave plates are provided with reinforcing ribs, and one ends of the horizontal side heave plates, far away from the floating box, are connected with simple planar plates or vertical plates and form L-shaped or T-shaped cross sections; hang down in the level and sway the board and be located the central point of body bottom under the triangle-shaped annular, hang down in the level and sway the board and be triangle-shaped, its three periphery respectively with three the lateral wall of flotation tank all is connected through a plurality of perpendicular connecting plates, hang down in the level and sway the board and be continuous planar structure, be equipped with the strengthening rib in, its side can be simple planar plate or connect the vertical slab to form L or T type cross-section.
According to one embodiment of the invention, the upper module is a truss structure and comprises at least an upper horizontal deck and a lower horizontal deck for arranging oil and gas production facilities and living facilities, wherein three upper modules are respectively a processing module, a public module and a living module, the living module is provided with a central control device for remotely controlling devices on the processing module and the public module, and the gallery bridge truss is internally provided with an upper pedestrian passage and a lower pedestrian passage which are respectively connected with the upper horizontal deck and the lower horizontal deck of the upper module.
According to one embodiment of the invention the platform mooring system comprises an anchor machine, a chain guide and an anchor chain, the anchor machine being arranged at the top end of the column, the anchor chain extending through the chain guide at the bottom of the column downwards by the anchor machine and further to be connected to the seabed.
According to one embodiment of the invention, the crude oil export system comprises an export platform and a set of export equipment, wherein the export platform is connected with the lower horizontal deck in the processing module, and the export equipment comprises an export hose roller and an export cable winch which are arranged on the export platform.
According to an embodiment of the invention, the riser suspension means is in plurality and each riser suspension means comprises a riser connector and a riser support structure provided on the buoyancy tank outer side wall, the riser connector being fixed to the riser support structure.
According to an embodiment of the present invention, two ends of the upright support rod are respectively connected to the bottom of the upper module and the top end of the upright, and two ends of the upright diagonal support rod are respectively connected to the upright side wall and the gallery bridge truss.
According to one embodiment of the invention, the column comprises an upper section, a middle section and a lower section of equal radial dimensions, a horizontal watertight deck being provided between the upper section and the middle section and between the middle section and the lower section.
According to one embodiment of the invention, the oil-water replacement wet-type oil storage device comprises an oil storage cabin, a buffer cabin, an oil inlet pipe, an oil outlet pipe, an water inlet pipe, a water outlet pipe and an oil-water replacement manifold, wherein the section of the oil storage cabin is circular and is positioned in the middle section of the upright post, the oil storage cabin is filled with crude oil and water all the time, the buffer cabin is annular and is positioned on the outer side of the oil storage cabin and forms an annular double-layer cabin wall structure together with the inner wall of the upright post and the outer wall of the oil storage cabin, and liquid level meters are arranged inside the oil storage cabin and inside the buffer cabin.
According to one embodiment of the invention, the oil-water displacement manifold is located at the top end of the upright column, and comprises a flowmeter, a valve and a jumper pipe, wherein the jumper pipe is respectively connected with the oil inlet pipe, the oil outlet pipe, the water inlet pipe and the water outlet pipe.
According to the high-performance large three-upright-post semi-submersible oil storage production platform, the adopted three-upright-post semi-submersible floating body is provided with the heave suppression device, the oil-water replacement wet oil storage technology is utilized, the overall performance and the comprehensive load ratio of the semi-submersible oil storage production platform are obviously improved, the load capacity of upper facilities of two ten thousand tons and the oil storage function of two ten thousand squares are simultaneously realized, compared with the existing semi-submersible oil storage production platform, the total cost of construction and installation engineering can be effectively reduced by more than 20%, and the economy of the semi-submersible oil storage production platform is greatly improved; the upper module is distributed and controlled by remote operation, so that the constructability and the safety of the semi-submersible oil storage production platform are obviously improved, and a safer and more efficient technical solution is provided for deepwater oil and gas development.
Drawings
Fig. 1 is a perspective view of a high performance large three-column semi-submersible oil storage production platform according to the present invention.
Fig. 2 is a front view of a high performance large three-column semi-submersible oil storage production platform according to the present invention.
Fig. 3 is a top view of a high performance large three-column semi-submersible oil storage production platform according to the present invention.
Fig. 4 is a schematic diagram of a cross section of a column of a high-performance large-scale three-column semi-submersible oil storage production platform and an oil-water replacement wet oil storage device according to the invention.
Reference numerals: 1-a float; 2-superstructure; 3-oil-water replacement wet oil storage device; 4-a platform positioning mooring system; 5-a heave suppression device; 6-riser suspension; 8-crude oil export system; 11-upright post; 12-a buoyancy tank; 13-horn chamber; 21-an upper module; 22-gallery bridge truss; 23-a processing module; 24-a common module; 25-a life module; 26-pedestrian access; 31-an oil storage tank; 32-a buffer cabin; 33-an oil inlet pipe; 34-an oil outlet pipe; 35-a water inlet pipe; 36-a water outlet pipe; 37-oil water displacement manifold; 38-inner water pipe; 51-horizontal side heave plate; 52-horizontal mid-heave plate; 53-vertical connection plates; 71-column support bars; 72-column diagonal brace; 100-water surface; 101-crude oil; 102-water; 103-oil water interface.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 4, a semi-submersible floating body 1 with a wet oil storage tank in the form of a three-column, a distributed superstructure 2 on the top of the floating body 1, a heave suppression device 5 on the bottom of the floating body 1, a column support rod 71 and a column diagonal brace 72 connecting the floating body 1 and the superstructure 2, wherein the floating body 1 comprises three watertight round vertical columns 11 which are of equal size and penetrate through the water surface and three watertight rectangular horizontal buoyancy tanks 12 which are of equal size and are connected with the bottoms of the columns 11 correspondingly, an angle between two adjacent buoyancy tanks 12 is provided with an angle tank 13, a triangular annular lower floating body is formed, it is understood that the included angle between two adjacent buoyancy tanks 12 is sixty degrees, a watertight dry buoyancy cabin and an oil-water replacement wet oil storage device 3 are arranged inside an upright post 11, a platform positioning mooring system 4 is arranged on the outer wall of the upright post 11, and a vertical pipe suspension device 6 is arranged on the outer side of the triangular annular lower floating body; superstructure 2 includes upper portion module 21 and horizontal corridor bridge truss 22 of rectangle, and upper portion module 21 is three independent and arranges respectively in the top of three stand 11, and corridor bridge truss 22 is three and connects gradually three upper portion module 21 along the clockwise to form triangle-shaped superstructure structure, be equipped with crude oil export system 8 on one of them upper portion module 21.
According to the high-performance large three-upright-post semi-submersible oil storage production platform, the adopted three-upright-post semi-submersible floating body is provided with the heaving restraining device 5, the oil-water replacement wet-type oil storage technology is utilized, the overall performance and the comprehensive load ratio of the semi-submersible oil storage production platform are obviously improved, the semi-submersible oil storage production platform simultaneously has the load capacity of two ten thousand ton-level upper facilities and the oil storage function of two ten thousand square, compared with the existing semi-submersible oil storage production platform, the total cost of building installation engineering can be effectively reduced by more than 20%, and the economy of the semi-submersible oil storage production platform is greatly improved; the upper module 21 is distributed and controlled by remote operation, so that the constructability and the safety of the semi-submersible oil storage production platform are effectively improved, and a safer and more efficient technical solution is provided for deepwater oil and gas development.
As shown in fig. 1 and 3, the heave suppression device 5 includes three horizontal side heave plates 51 and a horizontal middle heave plate 52 respectively connected to the outer sides of the bottoms of the three buoyancy tanks 12, the horizontal side heave plates 51 are rectangular continuous or discontinuous planar structures, each horizontal side heave plate 51 is horizontally arranged and extends from one end of the outer side of the bottom of the buoyancy tank 12 to the other end, holes can be formed in the horizontal side heave plates 51 according to actual requirements, and the horizontal side heave plates 51 are provided with reinforcing ribs, one end of each horizontal side heave plate 51 far away from the buoyancy tank 12 is connected with a simple planar plate or a connecting vertical plate, and an L-shaped or T-shaped cross section is formed, so as to effectively increase additional mass and damping, and improve the heave motion performance of the semi-submersible oil storage production platform; the horizontal middle heave plate 52 is horizontally arranged at the center of the bottom of the triangular annular lower floating body, the horizontal middle heave plate 52 is triangular, the three peripheries of the horizontal middle heave plate are respectively connected with the side wall of the triangular annular lower floating body through a plurality of vertical connecting plates 53, the gap between the outer wall of the horizontal middle heave plate 52 and the inner side wall of the triangular annular lower floating body can be flexibly selected through the length of the vertical connecting plates 53, the horizontal middle heave plate 52 is of a continuous plane structure, reinforcing ribs are arranged in the horizontal middle heave plate, holes can be formed according to actual requirements, the side edge of the horizontal middle heave plate can be a simple plane plate or a vertical plate, an L-shaped or T-shaped cross section is formed, additional mass and damping are effectively increased, and the heave motion performance of the semi-submersible oil storage production platform is improved.
As shown in fig. 1 to 3, the upper module 21 is a truss structure, and includes at least upper and lower horizontal decks for arranging equipment, wherein three upper modules 21 are a processing module 23, a common module 24 and a living module 25, respectively, the living module 25 is provided with a central control device for remotely controlling the equipment on the processing module 23 and the common module 24, it should be understood that the processing module 23 mainly includes processing equipment in oil and gas production, the common module 24 mainly includes a generator and fresh water production equipment, the living module 25 mainly includes a living building, a helicopter platform, etc., and the processing module 23 and the common module 24 are designed in an unmanned intelligent manner and can be remotely controlled by the living module 25, so that the safety and operability of the platform are greatly improved, and the cost of platform operators can be reduced, each upper module 21 can be integrally hoisted to the top end of the upright column 11 by a conventional kiloton hoisting device respectively to complete integral installation, the weight of the upper module 21 is respectively arranged at the top ends of the stand columns 11 far away from the geometric center of the semi-submersible oil storage production platform, so that the rotational inertia of the semi-submersible oil storage production platform is increased, the natural period of the rolling and pitching motion of the semi-submersible oil storage production platform is improved, the rolling and pitching angles of the semi-submersible oil storage production platform under the action of typhoon are reduced, and the motion performance of the semi-submersible oil storage production platform is obviously improved.
As shown in fig. 1 to 3, the gallery bridge girders 22 are provided with upper and lower pedestrian passages 26 connected to the upper and lower horizontal decks of the upper module 21, respectively, and extend from one upper module 21 to another upper module 21, wherein an angle between two adjacent gallery bridge girders 22 is generally set to sixty degrees.
As shown in fig. 1, the platform mooring system 4 comprises an anchor machine, a chain guide and an anchor chain, the anchor machine is arranged at the top end of the upright 11, the anchor chain extends downwards through the chain guide at the bottom of the upright 11 by the anchor machine and further extends to be connected with the seabed, and it is understood that the platform mooring system 4 is three sets and is respectively arranged on the three uprights 11.
The riser suspension units 6 are plural, and each riser suspension unit 6 includes a riser connector fixed to a riser support structure provided on an outer side wall of the buoyancy tank 12, and the riser connector.
The crude oil export system 8 comprises an export platform and a set of export equipment, the export platform is connected with the lower horizontal deck in the processing module 22, the export equipment comprises an export hose drum and an export cable winch which are arranged on the export platform, it is understood that the platform positioning mooring system 4, the riser suspension device 6 and the crude oil export system 8 are all prior art equipment, and no further description is provided herein.
As shown in fig. 1 to 3, two ends of the upright post support rod 71 are respectively connected to the bottom of the upper module 21 and the top end of the upright post 11, two ends of the upright post diagonal support rod 72 are respectively connected to the side wall of the upright post 11 and the gallery bridge truss 22, wherein the position where the upright post diagonal support rod 72 is connected to the gallery bridge truss 22 is located at the middle section of the gallery bridge truss 22, so that the structural stability and the structural strength of the oil storage production platform are improved.
As shown in figure 1, the upright post 11 comprises an upper section, a middle section and a lower section which have the same radial dimension, horizontal watertight decks are arranged between the upper section and the middle section and between the middle section and the lower section, the upright post 11 is a circular vertical upright post, most of the middle section and the lower section are positioned below a water surface 100, the diameter of the upright post 11 is greater than 20 meters, the distance between the centers of the two upright posts 11 is greater than 85 meters and is greater than the distance between the upright posts of the existing conventional four-upright post semi-submersible platform, so as to improve the stability of the oil storage production platform, it is understood that the three circular vertical upright posts 11 form a floating body combination, and under the conditions of the same weight of water displacement, draft and unit wet surface area steel, the three triangular upright posts are threeThe weight ratio of the steel material of each upright post 11 to the weight of the floating body formed by combining the conventional four upright posts is
Namely, the weight of steel required by the three-upright-column floating body is reduced by 13.4 percent compared with that of a four-upright-column floating body, namely, under the condition that the load weight of upper facilities is the same, the effective load of the combination of the three circular vertical-column floating bodies adopted by the invention is improved by 13.4 percent compared with that of the combination of the traditional four circular upright-column floating bodies.
The oil-water replacement wet-type oil storage device 3 comprises an oil storage tank 31, a buffer tank 32, an oil inlet pipe 33, an oil outlet pipe 34, an oil inlet pipe 35, an water outlet pipe 36 and an oil-water replacement manifold 37, wherein the section of the oil storage tank 31 is circular and is positioned in the middle section of the upright post 11, the oil storage tank 31 is filled with crude oil 101 and water 102 all the time, the crude oil 101 floats on the water surface to form an oil-water interface 103, the water 120 can be seawater, a liquid level meter is arranged inside the oil storage tank 31 and is used for monitoring the position of the oil-water interface 103, during oil storage, the treated crude oil 101 enters the oil storage tank 31 through the oil inlet pipe 33, the water 102 with the same volume is discharged through the water outlet pipe 36, during oil discharge, the crude oil 101 is output through the oil outlet pipe 34, the water 102 with the same volume enters through the water inlet pipe 35, and like the cycle operation, and the oil-water replacement efficient oil storage and oil discharge are realized by using the same space volume; the buffer tank 32 is annular and is positioned at the outer side of the oil storage tank 31, and forms an annular double-layer bulkhead structure with the inner wall of the upright post 11 and the outer wall of the oil storage tank 31, wherein an inner water pipe 38 is also communicated between the water 102 and the buffer tank 32, in the oil inlet process, the displaced seawater firstly enters the buffer tank 32, secondary separation is carried out on a small amount of crude oil possibly contained in the displaced seawater, a liquid level meter is arranged in the buffer tank 32 and is used for monitoring the water level in the buffer tank 32, the water quantity in the buffer tank 32 is adjusted through a ballast water pump, and the weight of the water is equal to the volume of the displaced seawater multiplied by the difference between the seawater and the crude oil density, so that the displacement of the platform in the oil-water displacement process is ensured to be unchanged; the oil-water displacement manifold 37 is located at the top end of the upright post 11, the oil-water displacement manifold 37 comprises a flowmeter, a valve and a jumper tube, the jumper tube is respectively connected with the oil inlet tube 33, the oil outlet tube 34, the water inlet tube 35 and the water outlet tube 36, and the oil-water displacement process is controlled by the flowmeter and the valve.
Adopt oil water replacement wet-type oil storage, can save half space compared with traditional dry-type oil storage, the theoretical value of the ratio of oil water replacement wet-type oil storage cabin steel weight and conventional dry-type oil storage cabin weight is:
further, assuming that the weight of the upper facility is equal to the weight of the stored oil, the ratio of the weight W3C of the floating steel of the three-upright semi-submersible oil-water replacement wet-type oil storage production platform to the weight W4C of the floating steel of the four-upright semi-submersible conventional dry-type oil storage platform can be calculated as follows:
that is, compared with the conventional semi-submersible oil storage production platform, the comprehensive load ratio of the invention can be increased by 26.1%, in the specific embodiment, the designed displacement of the existing large-scale four-upright-column semi-submersible oil storage production platform with the upper facility load of two ten thousand tons and the oil storage capacity of two ten thousand squares is about one hundred thousand tons generally, while the theoretical value of the designed displacement of the large-scale three-upright-column semi-submersible oil storage production platform adopting the invention can reach seven-point-three-nine-ten thousand tons at the minimum, and the displacement of the platform can not exceed eight ten thousand tons generally in consideration of other load factors such as mooring, stand pipe and the like, so that the steel can be saved by more than 20%.
The heave suppression device 5, the upper module 21 in distributed arrangement, the gallery bridge truss 22 and the oil-water replacement wet-type oil storage device 3 can also be used for other forms of floating bodies, including a semi-submersible platform in a four-column form.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a large-scale three stand semi-submerged formula oil storage production platforms of high performance which characterized in that includes: the floating body comprises three watertight round vertical columns which are equal in size and penetrate through the water surface and three watertight rectangular horizontal buoyancy tanks which are equal in size and correspond to the bottoms of the vertical columns, an angle cabin is arranged at the included angle between every two adjacent buoyancy tanks and forms a triangular annular lower floating body, a watertight dry buoyancy tank and an oil-water replacement wet oil storage device are arranged inside each vertical column, a platform positioning mooring system is arranged on the outer wall of each vertical column, and a vertical pipe suspension device is arranged on the outer side of each triangular annular lower floating body; the superstructure includes upper portion module and the horizontal gallery bridge truss of rectangle, the upper portion module is three independent structure and arranges respectively in threely the top of stand, the gallery bridge truss is three and connects gradually threely along the clockwise the upper portion module to form triangle-shaped superstructure structure, one of them be equipped with crude oil defeated system outward on the module of upper portion.
2. The large-scale three-column semi-submersible oil storage production platform of claim 1, wherein the heave suppression device comprises three horizontal side heave plates and a horizontal middle heave plate, the three horizontal side heave plates and the horizontal middle heave plate are respectively connected with the outer side of the bottom of the triangular annular lower floating body, the horizontal side heave plates are of a rectangular continuous or discontinuous planar structure, each horizontal side heave plate extends to the other end along one end of the outer side of the bottom of the buoyancy tank, the horizontal side heave plates are provided with reinforcing ribs, and one ends of the horizontal side heave plates, which are far away from the buoyancy tank, are connected with simple planar plates or vertical plates and form an L-shaped or T-shaped cross section; the horizontal middle heave plate is positioned at the center of the bottom of the triangular annular lower floating body, is triangular, is connected with the three side walls of the horizontal floating box through a plurality of vertical connecting plates at the periphery and is of a continuous plane structure, reinforcing ribs are arranged in the horizontal middle heave plate, and the side edges of the horizontal middle heave plate can be a simple plane plate or a connecting vertical plate to form an L-shaped or T-shaped cross section.
3. The large-scale three-column semi-submersible oil storage production platform of claim 1, wherein the upper module is a truss structure including at least upper and lower horizontal decks for arranging oil and gas production facilities and living facilities, three of the upper modules are a processing module, a common module and a living module, the living module is provided with a central control device for remotely controlling the devices on the processing module and the common module, and the gallery bridge truss is provided with upper and lower pedestrian passages connected with the upper and lower horizontal decks of the upper modules.
4. A large high-performance three-column semi-submersible oil storage production platform according to claim 1, wherein the platform mooring positioning system comprises an anchor machine, a chain guide and an anchor chain, the anchor machine being provided at the top end of the column, the anchor chain extending downwards through the chain guide at the bottom of the column by the anchor machine and further extending to connect to the seabed.
5. The large-scale three-column semi-submersible oil storage production platform of claim 3, wherein the crude oil export system comprises an export platform and an export equipment, the export platform is connected with the lower horizontal deck in the processing module, and the export equipment comprises an export hose drum and an export cable winch arranged on the export platform.
6. The large high-performance three-column semi-submersible oil storage production platform according to claim 1, wherein the number of the riser suspension devices is plural, and each of the riser suspension devices comprises a riser connector and a riser support structure provided on the outer side wall of the buoyancy tank, the riser connector being fixed to the riser support structure.
7. The large-scale three-column semi-submersible oil storage production platform of claim 3, wherein two ends of the column support rod are connected to the bottom of the upper module and the top of the column respectively, and two ends of the column diagonal support rod are connected to the column side wall and the gallery bridge truss respectively.
8. The large high-performance three-column semi-submersible oil storage production platform according to claim 1, wherein the columns comprise an upper section, a middle section and a lower section of the same radial dimension, and a horizontal watertight deck is provided between the upper section and the middle section and between the middle section and the lower section.
9. The large-scale three-column semi-submersible type oil storage production platform of claim 8, characterized in that the oil-water replacement wet-type oil storage device comprises an oil storage tank, a buffer tank, an oil inlet pipe, an oil outlet pipe, an water inlet pipe, a water outlet pipe and an oil-water replacement manifold, the cross section of the oil storage tank is circular and is located in the middle section of the column, the oil storage tank is filled with oil and water all the time, the buffer tank is annular and is located outside the oil storage tank, and forms an annular double-layer bulkhead structure with the inner wall of the column and the outer wall of the oil storage tank, wherein the inside of the oil storage tank and the inside of the buffer tank are both provided with level gauges.
10. The large-scale three-column semi-submersible oil storage production platform of claim 9, wherein the oil-water displacement manifold is located at the top end of the column, and comprises a flowmeter, a valve and a jumper tube, and the jumper tube is connected to the oil inlet tube, the oil outlet tube, the water inlet tube and the water outlet tube respectively.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115771595A (en) * | 2022-12-20 | 2023-03-10 | 中电建海上风电工程有限公司 | Novel semi-submersible lifting platform and offshore wind power hoisting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115771595A (en) * | 2022-12-20 | 2023-03-10 | 中电建海上风电工程有限公司 | Novel semi-submersible lifting platform and offshore wind power hoisting method |
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Effective date of registration: 20230116 Address after: 100027 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: CHINA NATIONAL OFFSHORE OIL Corp. Applicant after: OFFSHORE OIL ENGINEERING Co.,Ltd. Address before: 100027 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: CHINA NATIONAL OFFSHORE OIL Corp. Applicant before: OFFSHORE OIL ENGINEERING Co.,Ltd. Applicant before: COTEC, Inc. |