Underwater dry type self-installation oil storage platform

Abstract

The underwater dry type self-installation oil storage platform comprises a platform body, an oil storage caisson and a connecting column, the platform body is located above the oil storage caisson and connected with the oil storage caisson through a pile leg, the pile leg is used for being inserted into a penetration pile, a cabin is arranged in the oil storage caisson and used for storing crude oil, and the connecting column is located between the platform body and the oil storage caisson. The top end of the connecting column penetrates through the platform body, the bottom end of the connecting column is inserted into the oil storage caisson and fixedly connected with the oil storage caisson, the platform body can move up and down relative to the pile leg and the connecting column, the interior of the connecting column is of a hollow structure to form an access channel, and a maintenance channel leading to a cabin from the access channel is arranged in the oil storage caisson; the access channel and the maintenance channel are arranged, so that maintenance personnel are in a water-free environment during maintenance, the difficulty of maintenance in a water environment is avoided, the maintenance is easier, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of offshore oil field development, in particular to an underwater dry self-installed oil storage platform. Background Art

[0002] In the development of offshore oil fields in my country, the external transport of traditional oil storage platforms requires two-point mooring or dynamic positioning external transport tankers. Two-point mooring external transport requires the construction of a new berthing jacket platform, which will greatly increase the project investment. Dynamic positioning external transport is rarely used because there are fewer external transport tankers and the cost is high. Therefore, the external transport of oil storage platforms currently has the problem of high investment cost and cannot be reused. Moreover, conventional self-installed oil storage platforms can only rely on divers to carry out underwater maintenance. Since they work in the water, maintenance is difficult and the maintenance cost is high.

[0003] Therefore, a new underwater dry self-installed oil storage platform is urgently needed to solve the above technical problems. Summary of the invention

[0004] The present invention aims to solve the above technical problems, that is, to solve the problems that the existing oil storage platform needs two-point mooring or dynamic positioning oil tanker for external transmission, the two-point mooring external transmission needs to build a new berthing jacket platform, which will greatly increase the project investment, the dynamic positioning external transmission has fewer external transmission tankers and higher costs, is rarely used, and cannot be reused, and the conventional self-installed oil storage platform can only rely on divers to carry out underwater maintenance, which is difficult and expensive to maintain due to working in the water.

[0005] To this end, the present invention provides an underwater dry self-installed oil storage platform, including a platform body, an oil storage caisson and a connecting column, wherein the platform body is located above the oil storage caisson and is connected through pile legs, the pile legs are used to insert penetration piles, and a cabin is provided in the oil storage caisson for storing crude oil, the connecting column is located between the platform body and the oil storage caisson, the top end of the connecting column penetrates the platform body, the bottom end of the connecting column is inserted into the oil storage caisson and fixedly connected thereto, the platform body can move up and down relative to the pile legs and the connecting column, the interior of the connecting column is a hollow structure to form an entry and exit passage, and an inspection passage leading from the entry and exit passage to the cabin is provided in the oil storage caisson.

[0006] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the number of the cabins is four and they are surrounded by the connecting column as the center, and the maintenance passage is provided between two adjacent cabins.

[0007] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the underwater dry self-installed oil storage platform also includes a mooring device, which is located on one side of the platform body and connected to the oil storage caisson.

[0008] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the mooring device includes a mooring support leg and a mooring support rod, the mooring support leg is located on one side of the platform body and is fixedly connected to the oil storage caisson, the mooring support rod is fixed on the side wall of the mooring support leg facing away from the platform body, and a buffer is fixed to the end of the mooring support rod away from the mooring support leg.

[0009] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the number of the mooring support legs is at least two and they are arranged along the width direction of the oil storage platform, and at least one mooring support rod arranged vertically is fixed to each of the mooring support legs.

[0010] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the pile legs and the mooring support legs both penetrate the oil storage caisson, the mooring support legs and the pile legs are both hollow structures, and the inner walls of the mooring support legs and the pile legs are respectively fixed with multiple circumferentially arranged support members near the top end for fixed connection with the inserted penetration piles.

[0011] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the support member is in a T-shaped structure, and the T-shaped head of the support member is used for welding and fixing with the penetration pile.

[0012] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the platform body is a rectangular parallelepiped structure, and the four corner ends of the platform body respectively penetrate one of the pile legs, and the top of the pile leg is fixed with a mounting platform for installing a lifting device.

[0013] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, a notch through which the mooring support leg can pass is provided on the side wall of the platform body close to the mooring support leg.

[0014] In a specific embodiment of the above-mentioned underwater dry self-installed oil storage platform, the platform body is made of high-strength steel with a yield strength greater than or equal to 420 MPa.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up access passages and maintenance passages, maintenance personnel can be in a waterless environment during maintenance, avoiding the difficulties of maintenance in a water environment, making maintenance easier and reducing maintenance costs;

[0017] 2. The mooring device is set on one side of the platform body. The mooring device is connected to the oil storage caisson but not in contact with the platform body. Under the premise of meeting the requirements of crude oil export berthing, the impact of export berthing on the platform body can be reduced; after the entire oil storage platform is used, the penetration piles inserted into the pile legs and the mooring support legs can be cut along the underwater mud surface, so that the entire oil storage platform can be reused in the sea area with the same environmental conditions, realizing reuse and reducing the development project cost;

[0018] 3. The high-strength steel design of the platform body can effectively reduce the structural weight of the platform body. The oil storage caisson is set under the platform body to improve the overall bearing capacity of the platform body, which can improve the anti-overturning and anti-sinking of the platform body and increase the stability of the platform;

[0019] 4. During towing migration, part of the penetration piles will migrate along with the pile legs, and can be driven into the mud as part of the penetration piles during the next installation. Since the part of the penetration piles has been installed in the pile legs during installation and use, the length of the total penetration piles installed through the pile legs is reduced, so that a small floating crane can be used for installation without the need to use large floating crane resources, thus shortening the construction cost and time of the platform at sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of the underwater dry self-installation oil storage platform provided by the present invention when it is installed in place;

[0022] Figure 2 This is a schematic diagram of piling during installation of the underwater dry self-installing oil storage platform provided by the present invention;

[0023] Figure 3 It is a top view of the position distribution of the platform body and the mooring device;

[0024] Figure 4 It is a top view of the location distribution of the connecting columns, inspection passages and cabins in the oil storage caisson;

[0025] Figure 5 It is a schematic diagram of the structure in which the pile legs and the driven piles are connected through the supporting members;

[0026] Figure 6 This is a schematic diagram of the structure of the oil storage platform undergoing its first towing as a whole.

[0027] List of reference numerals:

[0028] 1. Platform body; 2. Cabin; 3. Mooring support rod; 4. Buffer; 5. Oil storage caisson; 6. Pile legs; 7. Mooring support legs; 8. Penetration piles; 9. Support members; 10. Mounting platform; 11. Notch; 12. Connecting column; 13. Maintenance passage; 14. Ladder; 15. Equipment installation area. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc., are used to define components, only for the convenience of distinguishing the above components, and unless otherwise stated, the above terms have no special meanings and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present invention relates to the technical field of offshore oilfield development, and in particular to an underwater dry self-installed oil storage platform. The purpose is to solve the problem that the existing oil storage platform needs two-point mooring or dynamic positioning of the external oil tanker for external transmission, the two-point mooring external transmission requires a new berthing jacket platform, and the project investment will increase significantly, the dynamic positioning external transmission is used less because there are fewer external oil tankers and the cost is high, and it cannot be reused, and the conventional self-installed oil storage platform can only rely on divers to perform underwater maintenance, and the maintenance is difficult and the maintenance cost is high because it is operated in the water. To this end, the present invention provides a platform body, a berthing device, an oil storage caisson and a connecting column. The platform body is located above the oil storage caisson and is connected through pile legs. The pile legs are used to insert penetration piles. A cabin is provided in the oil storage caisson for storing crude oil. The connecting column is located between the platform body and the oil storage caisson. The top end of the connecting column penetrates the platform body. The bottom end of the connecting column is inserted into the oil storage caisson and is fixedly connected thereto. The platform body can move up and down relative to the pile legs and the connecting column. The interior of the connecting column is a hollow structure to form an entry and exit passage. An inspection passage leading from the entry and exit passage to the cabin is provided in the oil storage caisson. The berthing device is located on one side of the platform body and is connected to the oil storage caisson. By setting up access passages and maintenance passages, maintenance personnel are in a waterless environment during maintenance, avoiding the difficulties of maintenance in a water environment, making maintenance easier and reducing maintenance costs; the mooring device is set on one side of the platform body, and the mooring device is connected to the oil storage caisson but not in contact with the platform body. Under the premise of meeting the requirements of crude oil export berthing, the impact of export berthing on the platform body can be reduced; after the entire oil storage platform is used, the penetration piles inserted into the pile legs and the mooring support legs can be cut along the underwater mud surface, so that the entire oil storage platform can be reused in the sea area with the same environmental conditions, realizing reuse and reducing the cost of development projects.

[0033] The underwater dry self-installed oil storage platform provided by the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1-4 The present invention also provides an underwater dry self-installed oil storage platform, including a platform body 1, an oil storage caisson 5 and a connecting column 12. The platform body 1 is located above the oil storage caisson 5 and is connected through pile legs 6. The pile legs 6 are used to insert penetration piles 8. A cabin 2 is provided in the oil storage caisson 5 for storing crude oil. The connecting column 12 is located between the platform body 1 and the oil storage caisson 5. The top of the connecting column 12 penetrates the platform body 1. The platform body 1 can move up and down relative to the connecting column 12. The bottom end of the connecting column 12 is inserted into the oil storage caisson 5 and fixedly connected thereto. The platform body 1 can move up and down relative to the pile legs 6 and the connecting column 12. The interior of the connecting column 12 is a hollow structure to form an inlet and outlet passage. An inspection passage 13 leading from the inlet and outlet passage to the cabin 2 is provided in the oil storage caisson 5.

[0035] Specifically, a ladder 14 is provided in the access channel for maintenance personnel to climb, and an equipment installation area 15 is provided at the top of the platform body 1 for installing the required equipment. The platform body 1 is a rectangular parallelepiped structure, which can meet the stability requirements during towing. The four corner ends of the platform body 1 are respectively penetrated by a pile leg 6, and a mounting platform 10 is fixed at the top of the pile leg 6 for installing a lifting device. The lifting device can be rented when the oil storage platform is installed as a whole, and the self-lifting installation of the oil storage platform is controlled by the lifting device.

[0036] In addition, the platform body 1 is made of high-strength steel of 420MPa or higher. For example, it is made of 420MPa high-strength steel. Compared with traditional steel with a yield strength of 355Mpa, it can reduce the weight by about 20% while ensuring the structural strength, thereby effectively reducing the structural weight of the platform body.

[0037] In this application, the number of cabins 2 and inspection passages 13 is not specifically limited and can be flexibly set according to actual conditions. Figure 4 As shown, there are four cabins 2 and they are surrounded by a connecting column as the center, and an inspection passage is provided between two adjacent cabins.

[0038] In the present application, by setting up the access passage and the maintenance passage 13, the maintenance personnel are in a waterless environment during maintenance, avoiding the difficulties of maintenance in a water environment, thereby making maintenance easier and reducing maintenance costs.

[0039] In one embodiment, the underwater dry self-installed oil storage platform further includes a mooring device, which is located on one side of the platform body 1 and connected to the oil storage caisson 5 .

[0040] In one embodiment, see Figure 1 and Figure 3 The mooring device includes a mooring support leg 7 and a mooring support rod 3. The mooring support leg 7 is located on one side of the platform body 1 and is fixed on the oil storage caisson 5. The mooring support rod 3 is fixed on the side wall of the mooring support leg 7 facing away from the platform body 1. A buffer member 4 is fixed to the end of the mooring support rod 3 away from the mooring support leg 7.

[0041] Specifically, a notch 11 is provided on the side wall of the platform body 1 close to the mooring support leg 7 so that the mooring support leg 7 can pass through, and there is a gap between the mooring support leg 7 and the notch 11 to ensure that the mooring device does not affect the platform body 1.

[0042] In the above embodiment, the buffer member 4 plays a buffering and protective role when in contact with the mooring hull, so as to avoid being scratched or damaged due to the collision between the mooring hull and the mooring support rod 3. The buffer member 4 can be made of hard rubber and made into a plate-like structure, such as a rectangular parallelepiped shape. The mooring support rod 3 is used to fix with the hull when the hull is moored to achieve mooring.

[0043] In one embodiment, see Figure 3 The number of the mooring support legs 7 is at least two and they are arranged along the width direction of the oil storage platform, and each mooring support leg 7 is fixed with at least one mooring support rod 3 arranged up and down.

[0044] It should be noted that the present application does not make any specific limitation on the number of the mooring support legs 7 and the number of the mooring support rods 3 on each mooring support leg 7, and they can be flexibly set according to actual usage.

[0045] In one embodiment, referring to 1 and Figure 5 The mooring support leg 7 and the pile leg 6 are both hollow structures. A plurality of circumferentially arranged support members 9 are fixed to the inner walls of the mooring support leg 7 and the pile leg 6 near the top to be fixedly connected with the inserted penetration pile 8. The pile leg 6 and the mooring support leg 7 can both be cylindrical in shape, and the interior is designed to be a hollow structure. The pile leg 6 and the mooring support leg 7 have the same structure of connecting with the penetration pile 8 using the support member 9.

[0046] In one embodiment, see Figure 5 The support member 9 is in a T-shaped structure, the T-shaped head of the support member 9 is used for welding and fixing with the penetration pile 8, and the T-shaped rod of the support member 9 is in a welding state with the inner wall of the pile leg.

[0047] In the above embodiment, the pile legs 6 and the mooring support legs 7 are both welded and fixed with the support members 9 and the penetration piles 8, which not only increases the stability of the platform body 1, but also uses the T-shaped support members 9 to connect the pile legs and the penetration piles 8. The T-shaped head expands the area of ​​the T-shaped rod, making welding easier. At the same time, the T-shaped rod part is directly cut during disassembly, and the cutting size is relatively small, which makes disassembly faster. In addition, multiple support members 9 are arranged in a circle, so that there is a gap between adjacent support members 9, and the cutting size is also reduced during disassembly, which speeds up the disassembly speed. In addition, the penetration piles 8 and the pile legs are fixed by the support members 9, which meets the requirements of mooring and can withstand more than 1500t of mooring force load.

[0048] In the present application, the berthing device is arranged on one side of the platform body 1, and the berthing device is connected to the oil storage caisson 5 but not in contact with the platform body 1. On the premise of meeting the requirements of crude oil export berthing, the impact of export berthing on the platform body 1 can be reduced. After the oil field production is completed, the penetration piles 8 at the mud surface are cut off, lifted by the lifting device, and towed and moved, which can be reused, which is conducive to reducing construction costs.

[0049] Also, see Figure 6During towing migration, part of the penetration pile 8 moves with the pile leg, and can be driven into the mud as part of the penetration pile 8 during the next installation. Since the part of the penetration pile 8 has been installed in the pile leg during installation and use, the length of the total penetration pile 8 installed through the pile leg is reduced, so that a small floating crane can be used for installation, and there is no need to use large floating crane resources, and the time for loading the penetration pile 8 into the pile leg is reduced, thereby shortening the construction cost and construction time of the oil storage platform at sea. When reused, the support member 9 is separated from the penetration pile 8 by external tools, and then the penetration pile 8 is driven into the new installation position again. When the oil storage platform is used for the first time, a section of the penetration pile 8 is inserted into the corresponding pile leg 6 and the berthing support leg 7, and fixed by welding part of the support member 9 to the penetration pile 8, so as to ensure that the penetration pile 8 is fixed in position during the transfer process of the pile leg. When the installation position is reached, the support member 9 is separated from the penetration pile 8, so that the penetration pile 8 can be moved, so that it can be driven into the designated position below the mud surface.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An underwater dry self-installed oil storage platform, characterized in that: The utility model comprises a platform body, an oil storage caisson and a connecting column, wherein the platform body is located above the oil storage caisson and is connected through pile legs, the pile legs are used for inserting penetration piles, a cabin is provided in the oil storage caisson for storing crude oil, the connecting column is located between the platform body and the oil storage caisson, the top end of the connecting column penetrates the platform body, the bottom end of the connecting column is inserted into the oil storage caisson and is fixedly connected thereto, the platform body can move up and down relative to the pile legs and the connecting column, the interior of the connecting column is a hollow structure to form an entry and exit passage, and an inspection passage leading from the entry and exit passage to the cabin is provided in the oil storage caisson.

2. The underwater dry self-installed oil storage platform according to claim 1, characterized in that: There are four cabins, which are surrounded by the connecting column as the center, and the inspection passage is provided between two adjacent cabins.

3. The underwater dry self-installed oil storage platform according to claim 1, characterized in that: The underwater dry self-installed oil storage platform also includes a mooring device, which is located on one side of the platform body and connected to the oil storage caisson.

4. The underwater dry self-installed oil storage platform according to claim 3 is characterized in that: The mooring device includes a mooring support leg and a mooring support rod, the mooring support leg is located on one side of the platform body and fixedly connected to the oil storage caisson, the mooring support rod is fixed on the side wall of the mooring support leg facing away from the platform body, and a buffer is fixed to the end of the mooring support rod away from the mooring support leg.

5. The underwater dry self-installed oil storage platform according to claim 4 is characterized in that: The number of the mooring support legs is at least two and they are arranged along the width direction of the oil storage platform, and at least one mooring support rod arranged up and down is fixed to each of the mooring support legs.

6. The underwater dry self-installed oil storage platform according to claim 4, characterized in that: The pile legs and the mooring support legs both penetrate the oil storage caisson, and the interiors of the mooring support legs and the pile legs are both hollow structures. The inner walls of the mooring support legs and the pile legs are respectively fixed with multiple circumferentially arranged support members near the top ends for fixed connection with the inserted penetration piles.

7. The underwater dry self-installed oil storage platform according to claim 6, characterized in that: The support member is in a T-shaped structure, and the T-shaped head of the support member is used for welding and fixing with the driven pile.

8. The underwater dry self-installed oil storage platform according to claim 1, characterized in that: The platform body is a rectangular parallelepiped structure, and the four corner ends of the platform body respectively penetrate one of the pile legs. The top of the pile leg is fixed with a mounting platform for installing a lifting device.

9. The underwater dry self-installed oil storage platform according to claim 4, characterized in that: A notch is provided on the side wall of the platform body close to the mooring support leg, through which the mooring support leg can pass.

10. The underwater dry self-installed oil storage platform according to any one of claims 1 to 9, characterized in that: The platform body is made of high-strength steel with a yield strength greater than or equal to 420 MPa.

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