Underwater oil storage device

Abstract

The invention relates to an underwater oil storage device which comprises a rigid shell, a flexible bag body and a pile foundation. A first containing cavity is formed in the rigid shell, and a water inlet and outlet is formed in the rigid shell and used for communicating the first containing cavity with the water environment. The flexible bag body is arranged in the first containing cavity, a second containing cavity is formed in the flexible bag body, a center cylinder is arranged in the second containing cavity, and the two ends of the center cylinder extend out of the flexible bag body and are detachably connected with the rigid shell. A pile foundation sleeve is arranged on the rigid shell, one end of the pile foundation is inserted into the seabed, and the other end of the pile foundation is inserted into the pile foundation sleeve and connected with the pile foundation sleeve. Compared with the prior art, the underwater oil storage device has the advantages that the installation, maintenance or disassembly efficiency is effectively improved, and the underwater oil storage device has the reutilization performance.

Description

Technical Field

[0001] The invention relates to an oil storage facility, in particular to an underwater oil storage device. Background Art

[0002] In the process of offshore oilfield development, the storage and transportation of crude oil is an important link. The conventional storage and transportation modes are: the well flow produced by the jacket wellhead platform is transported to the central production and processing platform through the submarine mixed pipeline for processing, and the finished oil is then transported to the land terminal through the submarine oil and gas pipelines respectively; the well flow produced by the jacket wellhead platform is transported to the offshore floating production storage and offloading device (Floating Production Storage and Offloading, FPSO) through the submarine mixed pipeline for processing, and the finished oil is stored on the FPSO, and the oil is regularly unloaded by shuttle tankers and sent to the port. If the conventional development mode is adopted for many shallow marginal oil fields that have been discovered in my country's offshore, the initial investment in development is large, the construction period is long, the operation and maintenance cost is high, the economy is poor, and it is difficult to achieve profitability.

[0003] Underwater oil storage tanks have low construction costs, high benefits, and good economic efficiency. They can effectively replace FPSO, significantly reduce the daily operation and maintenance costs of oil fields, and improve the safety of the operation process. First, the oil tank is kept full of liquid, isolated from fire sources and lightning, with low oil and gas loss and not easy to be ignited, and no inert gas system is required; secondly, the overall center of gravity of the oil tank is low, and the probability of being hit by ships and other objects is greatly reduced; and underwater oil storage is not affected by floating ice on the sea surface, strong winds and huge waves, and can continue to produce in severe sea conditions. The capacity of the storage tank is not limited, and the oil storage potential is huge.

[0004] Some existing underwater oil storage devices are difficult to transfer, refit, and overhaul at sea, and cannot take into account both scale and flexibility. Therefore, it is necessary to design an underwater oil storage device with a simple structure to improve installation efficiency and mobility. Summary of the invention

[0005] The purpose of the present invention is to provide an underwater oil storage device in order to overcome the defects of the above-mentioned prior art and improve the installation efficiency and mobility.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An underwater oil storage device, comprising:

[0008] A rigid shell, wherein a first accommodating cavity is provided in the rigid shell, and a water inlet and outlet are provided on the rigid shell, wherein the water inlet and outlet are used to connect the first accommodating cavity with a water environment;

[0009] A flexible capsule, wherein the flexible capsule is disposed in the first accommodating cavity, a second accommodating cavity is disposed in the flexible capsule, a central tube is disposed in the second accommodating cavity, two ends of the central tube respectively extend out of the flexible capsule and are detachably connected to the rigid shell;

[0010] Pile foundation, a pile foundation sleeve is provided on the rigid shell, one end of the pile foundation is inserted into the seabed, and the other end is inserted into the pile foundation sleeve and connected to the pile foundation sleeve.

[0011] In one embodiment, the pile foundation sleeves are provided in plurality, and the plurality of pile foundation sleeves are evenly distributed along the circumference of the rigid shell, and the pile foundations are provided in plurality, and correspond one-to-one to the pile foundation sleeves.

[0012] In one of the embodiments, a plurality of first reinforcing ribs are disposed on the outer circumferential surface of the rigid shell, and the first reinforcing ribs are evenly distributed on the outer circumferential surface.

[0013] In one of the embodiments, a plurality of second reinforcing ribs are provided on the bottom outer end surface of the rigid shell, and the second reinforcing ribs are evenly distributed on the bottom outer end surface for contacting with the seabed.

[0014] In one embodiment, the rigid shell includes a bottom wall and a top wall, a bottom base is provided on the inner side of the bottom wall, a top mounting hole is provided on the top wall, a top base is provided around the mounting hole on the outer side of the top wall, one end of the center tube passes through the top mounting hole and is connected to the top base, and the other end of the center tube is connected to the bottom base.

[0015] In one of the embodiments, a bottom support plate is further provided in the rigid shell, a bottom mounting hole is provided on the bottom support plate, and the center tube passes through the bottom mounting hole to be connected to the bottom base.

[0016] In one of the embodiments, a plurality of evenly distributed third reinforcing ribs are provided on one side of the bottom support plate close to the bottom wall.

[0017] In one of the embodiments, one end of the central tube is connected to the top base via a top flange, and the other end of the central tube is connected to the bottom base via a bottom flange.

[0018] In one of the embodiments, an oil hole communicating with the second accommodating chamber is provided on the circumferential surface of the central tube, an oil pump is provided in the central tube, and the oil pump is communicated with an oil production device through an oil pipe.

[0019] In one of the embodiments, a plurality of the oil holes are provided, and the plurality of the oil holes are evenly distributed on the circumference of the central tube, and the oil pump is provided at the bottom of the central tube.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The above-mentioned underwater oil storage device includes a rigid shell and a flexible capsule. The rigid shell is connected to the water environment through the water inlet and outlet, and is used to balance the internal and external pressure difference of the rigid shell. It can be directly connected to the pile foundation through the pile foundation sleeve. The flexible capsule is used to contain oil and is detachably connected to the rigid shell through the center tube. During the installation process, the rigid shell and the flexible capsule can be constructed or processed separately, and then the rigid shell and the flexible capsule are connected through the center tube, and finally the rigid shell and the flexible capsule connected as one are connected to the pile foundation as a whole, so that the underwater oil storage device is fixed on the seabed; during maintenance, only the connection structure between the center tube and the rigid shell can be disassembled to replace or repair the flexible capsule; at the same time, if it needs to be disassembled or reused, it is only necessary to disconnect the connection structure between the pile foundation and the pile foundation sleeve, and the rigid shell and the flexible capsule as a whole can be reused without damage; therefore, the underwater oil storage device effectively improves the installation, maintenance or disassembly efficiency, and makes the underwater oil storage device reusable.

[0022] 2. A first reinforcing rib is provided on the outer circumferential surface of the rigid shell to improve the structural strength of the side circumference of the rigid shell and improve the wind and wave resistance performance, and a second reinforcing rib is further provided on the bottom wall of the rigid shell, which not only improves the structural strength of the bottom wall of the rigid shell, but also forms an area with pores between the bottom wall of the rigid shell and the seabed, avoiding the formation of a vacuum adsorption connection between the bottom wall of the rigid shell and the seabed, so as to facilitate the disassembly of the underwater oil storage device.

[0023] 3. A bottom support plate is provided in the rigid shell, and the bottom of the center tube is connected to the bottom base through the bottom support plate. Therefore, the bottom support plate can support the flexible capsule, providing a buffer area for the bottom installation of the center tube, and a third reinforcing rib is provided on the bottom support plate, which effectively improves the supporting strength of the bottom support plate and ensures the ability to bear the weight of the oil in the flexible capsule.

[0024] 4. An oil hole is provided on the center tube. The oil pump pumps the oil into the center tube and enters the flexible bladder through the oil hole. When the oil pump pumps the oil out, it must first pass through the oil hole and then pump it out. Therefore, the center tube is connected with the second accommodating chamber of the flexible bladder through the oil hole, forming a buffer area for the pumping in and out of the oil, so as to avoid the elasticity of the flexible bladder being damaged by too high an oil pumping speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the underwater oil storage device of the present invention.

[0026] Figure 2 It is a top view of the underwater oil storage device of the present invention.

[0027] Figure 3It is a structural schematic diagram of the connection between the central tube and the top wall of the rigid shell of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the connection between the central tube and the bottom wall of the rigid shell of the present invention.

[0029] Figure 5 It is a schematic diagram of the installation process of the underwater oil storage device in the present invention.

[0030] Figure 6 The figure is a schematic diagram of the disassembly process of the underwater oil storage device in the present invention.

[0031] Figure numerals: 100, underwater oil storage device; 10, rigid shell; 11, first accommodating chamber; 12, water inlet and outlet; 13, first reinforcing rib; 14, second reinforcing rib; 15, bottom base; 16, top base; 17, bottom support plate; 171, third reinforcing rib; 20, flexible bladder; 21, second accommodating chamber; 30, center tube; 31, top flange; 32, bottom flange; 33, oil hole; 40, pile foundation; 50, pile foundation sleeve; 60, oil pump; 61, oil pipe; 70, seabed. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] An underwater oil storage device 100 in some embodiments is described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 4 As shown, in one embodiment, an underwater oil storage device 100 is provided, comprising a rigid shell 10, a flexible bladder 20 and a pile foundation 40;

[0035] Among them, a first accommodating chamber 11 is provided in the rigid shell 10, and a water inlet and outlet 12 is provided on the rigid shell 10, and the water inlet and outlet 12 are used to connect the first accommodating chamber 11 and the water environment; the flexible capsule 20 is provided in the first accommodating chamber 11, and a second accommodating chamber 21 is provided in the flexible capsule 20, and a center tube 30 is provided in the second accommodating chamber 21, and both ends of the center tube 30 extend out of the flexible capsule 20 respectively, and are detachably connected to the rigid shell 10; a pile foundation sleeve 50 is provided on the rigid shell 10, one end of the pile foundation 40 is inserted into the seabed 70, and the other end is inserted into the pile foundation sleeve 50 and connected to the pile foundation sleeve 50.

[0036] The above-mentioned underwater oil storage device 100 includes a rigid shell 10 and a flexible capsule 20. The rigid shell 10 is connected to the water environment through the water inlet and outlet 12, and is used to balance the internal and external pressure difference of the rigid shell. It can be directly connected to the pile foundation 40 through the pile foundation sleeve 50. The flexible capsule 20 is used to contain oil and is detachably connected to the rigid shell 10 through the central tube 30.

[0037] like Figure 5 As shown, during the installation process, the rigid shell 10 and the flexible bladder 20 can be constructed or processed separately, and then connected to each other through the central tube 30, and finally the rigid shell 10 and the flexible bladder 20 connected as one are connected to the pile foundation 40 as a whole, so that the underwater oil storage device 100 is fixed on the seabed 70;

[0038] like Figure 6 As shown, during maintenance, only the connection structure between the central tube 30 and the rigid shell 10 can be disassembled to replace or repair the flexible bladder 20; at the same time, if it needs to be disassembled or reused, only the connection structure between the pile foundation 40 and the pile foundation sleeve 50 needs to be disconnected, and the rigid shell 10 and the flexible bladder 20 as a whole can be reused without damage; therefore, the underwater oil storage device 100 effectively improves the efficiency of installation, maintenance or disassembly, and makes the underwater oil storage device 100 reusable.

[0039] Among them, the number of water inlets and outlets 12 is not limited, and can be 2, 4 or 8, etc., which are set according to the actual needs of the underwater storage structure, and can also be set on the side or bottom wall of the rigid shell 10.

[0040] Furthermore, the flexible bladder 20 is a composite material and has a certain elasticity. The shape of the flexible bladder 20 after expansion is adapted to the shape of the first accommodating cavity 11 of the rigid shell 10 .

[0041] In this specific embodiment, the rigid shell 10 includes a steel shell, and its shape may include a cylindrical, rectangular, or polygonal column shell. The top wall of the rigid shell 10 includes but is not limited to a full flat top, a central flat top, a dome on all sides, and an integral dome.

[0042] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, a plurality of pile foundation sleeves 50 are provided, and the plurality of pile foundation sleeves 50 are evenly distributed along the circumference of the rigid shell 10 , and a plurality of pile foundations 40 are provided, and correspond one to one with the pile foundation sleeves 50 .

[0043] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, a plurality of first reinforcing ribs 13 are provided on the outer circumferential surface of the rigid shell 10 , and the first reinforcing ribs 13 are evenly distributed on the outer circumferential surface.

[0044] In addition, a plurality of evenly distributed first reinforcing ribs 13 are also provided on the top outer end surface of the rigid shell 10 .

[0045] Furthermore, if Figure 1 and Figure 4 As shown, in one embodiment, a plurality of second reinforcing ribs 14 are provided on the bottom outer end surface of the rigid shell 10 , and the second reinforcing ribs 14 are evenly distributed on the bottom outer end surface for contacting with the seabed 70 .

[0046] A first reinforcing rib 13 is provided on the outer peripheral surface of the rigid shell 10, which is used to improve the structural strength of the side periphery of the rigid shell 10 and improve the wind and wave resistance performance, and a second reinforcing rib 14 is further provided on the bottom wall of the rigid shell 10, which not only improves the structural strength of the bottom wall of the rigid shell 10, but also forms an area with pores between the bottom wall of the rigid shell 10 and the seabed 70, thereby avoiding the formation of a vacuum adsorption connection between the bottom wall of the rigid shell 10 and the seabed 70, so as to facilitate the disassembly of the underwater oil storage device 100.

[0047] In this specific embodiment, the first reinforcement ribs 13 and the second reinforcement ribs 14 may include T-shaped reinforcement ribs, angle steel reinforcement ribs, and box beam reinforcement ribs.

[0048] Specifically, Figure 3 and Figure 4 As shown, in one embodiment, the rigid shell 10 includes a bottom wall and a top wall, a bottom base 15 is provided on the inner side of the bottom wall, a top mounting hole is provided on the top wall, a top base 16 is provided on the outer side of the top wall around the mounting hole, one end of the center tube 30 passes through the top mounting hole and is connected to the top base 16, and the other end of the center tube 30 is connected to the bottom base 15.

[0049] Furthermore, if Figure 4 As shown, in one embodiment, a bottom support plate 17 is further provided in the rigid shell 10 , and a bottom mounting hole is provided on the bottom support plate 17 , and the central tube 30 passes through the bottom mounting hole to be connected with the bottom base 15 .

[0050] And, if Figure 4 As shown, in one embodiment, a plurality of evenly distributed third reinforcing ribs 171 are provided on one side of the bottom support plate 17 close to the bottom wall.

[0051] A bottom support plate 17 is provided in the rigid shell 10, and the bottom of the center tube 30 is connected to the bottom base 15 through the bottom support plate 17, so that the bottom support plate 17 can support the flexible bladder 20, providing a buffer area for the bottom installation of the center tube 30, and a third reinforcing rib 171 is provided on the bottom support plate 17, which effectively improves the supporting strength of the bottom support plate 17 and ensures the ability to bear the weight of the oil in the flexible bladder 20.

[0052] In this specific embodiment, one end of the central tube 30 is connected to the top base 16 via a top flange 31 , and the other end of the central tube 30 is connected to the bottom base 15 via a bottom flange 32 .

[0053] Specifically, Figure 1 As shown, in one embodiment, an oil hole 33 communicating with the second accommodating chamber 21 is provided on the circumferential surface of the central tube 30 , and an oil pump 60 is provided in the central tube 30 , and the oil pump 60 is communicated with the oil production device through an oil pipe 61 .

[0054] Furthermore, if Figure 1 As shown, in one embodiment, a plurality of oil holes 33 are provided, and the plurality of oil holes 33 are evenly distributed on the circumference of the central tube 30 , and the oil pump 60 is disposed at the bottom of the central tube 30 .

[0055] An oil hole 33 is provided on the central tube 30. The oil pump 60 pumps the oil into the central tube 30 and enters the flexible capsule 20 through the oil hole 33. When the oil pump 60 pumps the oil out, it must first pass through the oil hole 33 and then be pumped out. Therefore, the central tube 30 is connected to the second accommodating chamber 21 of the flexible capsule 20 through the oil hole 33, forming a buffer area for the pumping in and out of the oil, thereby preventing the elasticity of the flexible capsule 20 from being damaged by too high an oil pumping speed.

[0056] In this specific embodiment, the central tube 30 includes a cylindrical central tube, a polygonal column central tube, a variable-section cylindrical central tube, and a variable-section polygonal column central tube.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0062] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An underwater oil storage device, characterized in that: include: A rigid shell (10), wherein a first accommodating chamber (11) is provided in the rigid shell (10), and a water inlet and outlet (12) are provided on the rigid shell (10), wherein the water inlet and outlet (12) are used to connect the first accommodating chamber (11) and a water environment; a flexible capsule (20), the flexible capsule (20) being arranged in the first accommodating cavity (11), the flexible capsule (20) being provided with a second accommodating cavity (21), the second accommodating cavity (21) being provided with a central tube (30), the two ends of the central tube (30) respectively extending out of the flexible capsule (20) and being detachably connected to the rigid shell (10); A pile foundation (40), wherein a pile foundation sleeve (50) is provided on the rigid shell (10), one end of the pile foundation (40) is inserted into the seabed (70), and the other end is inserted into the pile foundation sleeve (50) and connected to the pile foundation sleeve (50).

2. An underwater oil storage device according to claim 1, characterized in that: A plurality of the pile foundation sleeves (50) are provided, and the plurality of the pile foundation sleeves (50) are evenly distributed along the circumference of the rigid shell (10). A plurality of the pile foundations (40) are provided, and correspond one to one with the pile foundation sleeves (50).

3. An underwater oil storage device according to claim 1, characterized in that: A plurality of first reinforcing ribs (13) are provided on the outer peripheral surface of the rigid shell (10), and the first reinforcing ribs (13) are evenly distributed on the outer peripheral surface.

4. An underwater oil storage device according to claim 1, characterized in that: A plurality of second reinforcing ribs (14) are provided on the bottom outer end surface of the rigid shell (10), and the second reinforcing ribs (14) are evenly distributed on the bottom outer end surface and are used for abutting against the seabed (70).

5. The underwater oil storage device according to claim 1, characterized in that: The rigid shell (10) comprises a bottom wall and a top wall, a bottom base (15) is provided on the inner side of the bottom wall, a top mounting hole is provided on the top wall, a top base (16) is provided on the outer side of the top wall around the mounting hole, one end of the center tube (30) passes through the top mounting hole and is connected to the top base (16), and the other end of the center tube (30) is connected to the bottom base (15).

6. An underwater oil storage device according to claim 5, characterized in that: A bottom support plate (17) is also provided in the rigid shell (10), and a bottom mounting hole is provided on the bottom support plate (17), and the central tube (30) passes through the bottom mounting hole to be connected to the bottom base (15).

7. An underwater oil storage device according to claim 6, characterized in that: A plurality of evenly distributed third reinforcing ribs (171) are provided on one side of the bottom support plate (17) close to the bottom wall.

8. An underwater oil storage device according to claim 5, characterized in that: One end of the central tube (30) is connected to the top base (16) via a top flange (31), and the other end of the central tube (30) is connected to the bottom base (15) via a bottom flange (32).

9. The underwater oil storage device according to claim 1, characterized in that: An oil hole (33) communicating with the second accommodating chamber (21) is provided on the peripheral surface of the central tube (30), an oil pump (60) is provided in the central tube (30), and the oil pump (60) is communicated with an oil production device through an oil pipe (61).

10. An underwater oil storage device according to claim 9, characterized in that: A plurality of the oil holes (33) are provided, and the plurality of the oil holes (33) are evenly distributed on the peripheral surface of the central tube (30). The oil pump (60) is arranged at the bottom of the central tube (30).

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