Sectional type modular ocean jacket platform

Abstract

The utility model discloses a sectional type modularized ocean jacket platform which is characterized by comprising a lower sectional structure, a plurality of sectional connecting pieces, an upper sectional structure and a vertical pipe sectional structure, the upper sectional structure and the lower sectional structure are arranged up and down, the upper sectional structure and the lower sectional structure are connected through the sectional connecting pieces, and the vertical pipe sectional structure is connected with the lower sectional structure through the vertical pipe connecting pieces. The vertical pipe segmented structure is arranged on the inner side of the lower segmented structure and the inner side of the upper segmented structure, the lower segmented structure is used for being fixedly connected with a seabed, and the upper segmented structure is used for supporting an ocean platform module. The jacket is divided into the lower segmented structure, the segmented connecting pieces, the upper segmented structure and the vertical pipe segmented structure to achieve segmented modular design, so that segmented prefabrication and overall assembly of all parts of the jacket can be carried out at different places, complexity of site construction is reduced, the weight of offshore hoisting can be effectively reduced, and the construction cost is reduced. And therefore, the use requirement on large floating crane resources is reduced, and the overall cost of marginal oil field development is reduced.

Description

Technical Field

[0001] The utility model relates to the technical fields of petrochemical industry and marine engineering, in particular to a segmented modular marine jacket platform. Background Art

[0002] Conventional oilfield development technology solutions are often not economically effective due to high costs. Therefore, it is particularly important to study special technical solutions to reduce costs for the development of small marginal oilfields. For conventional jacket platforms, large ship resources are usually used during the installation process, resulting in high platform construction costs. In order to reduce dependence on large construction ships and reduce construction costs, it is necessary to study and develop some unconventional jacket solutions to reduce the weight of offshore lifting.

[0003] As one of the solutions, the simple jacket platform has been developed for more than 30 years and presents a variety of structural forms. For example, the MOSS simple jacket platform mainly adopts a skirt pile to support the vertical jacket structure; the LL&E simple jacket platform is a skirt pile tripod jacket structure. In recent years, a large number of simple jacket platforms have been developed and applied in China, including single-leg multi-pile type, two-leg three-pile type and three-leg three-pile type. Different types of simple jacket platforms are suitable for different water depths and sea conditions. However, the simple jacket types that have been used are either still heavy and still highly dependent on floating crane resources for construction, or light in weight, meeting the demand for the use of small floating crane resources, but with poor stability, insufficient reserve strength and poor risk resistance.

[0004] In order to solve the above problems, the segmented modular offshore jacket platform technology came into being. The segmented modular offshore jacket platform can be installed in sections, reduce the weight of the single unit, and use relatively small floating crane resources to complete the installation, thereby reducing construction costs and project investment to meet the needs of marginal oil field development. However, how to further reduce weight while ensuring stability and strength is still a challenge that the current simple jacket technology needs to face. Utility Model Content

[0005] The purpose of the utility model is to provide a segmented modular offshore jacket platform to solve one or more technical problems existing in the above-mentioned background technology.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A segmented modular marine jacket platform comprises a lower segment structure, a plurality of segment connectors, an upper segment structure and a riser segment structure, wherein the upper segment structure and the lower segment structure are arranged one above the other, the upper segment structure and the lower segment structure are connected via the segment connector, the riser segment structure is arranged on the inner side of the lower segment structure and the upper segment structure, the lower segment is used for fixed connection with the seabed, and the upper segment structure is used for supporting a marine platform module.

[0008] Preferably, the lower segment structure is wider at the bottom and narrower at the top.

[0009] Preferably, the lower segment structure includes a plurality of first columns, a plurality of second columns, a plurality of first oblique connecting rods, a plurality of second oblique connecting rods and a first horizontal frame layer, the plurality of first columns are vertically arranged on the outside of the second columns, the two ends of the first oblique connecting rod are respectively connected to the top of the second column and the middle of the first column, the two ends of the second oblique connecting rod are respectively connected to the middle of the first column and the bottom of the second column, and the outer side and the inner side of the first horizontal frame layer are respectively connected to the plurality of first columns and the plurality of second columns.

[0010] Preferably, the segmented connecting member includes an installation guide unit and a tip unit, the installation guide unit is arranged at the top of the lower segment structure, and the tip unit is arranged at the bottom of the upper segment structure, and the upper segment structure is connected to the lower segment structure up and down through the cooperation of the tip unit and the installation guide unit.

[0011] Preferably, the installation guide unit includes a trumpet-shaped guide member, a sealing ring and a rubber ring, the sealing ring is arranged on the inner side of the top end of the lower segment structure, the guide member is fixed on the outer side of the top end of the lower segment structure, the rubber ring is arranged on the upper surface of the sealing ring, and the tip unit is in contact with the guide member and the rubber ring.

[0012] Preferably, the plug tip unit includes a conical plug tip and a corbel structure, the conical plug tip is arranged at the bottom of the upper segment structure, the corbel structure is arranged on the outside of the conical plug tip, and the conical plug tip is connected to the installation guide unit through the corbel structure.

[0013] Preferably, the upper segmented structure includes a plurality of third columns and a plurality of second horizontal frame layers, the plurality of second horizontal frame layers are arranged alternately up and down, a plurality of third columns are vertically arranged and distributed on the outside of the second horizontal frame layers, a plurality of connecting rods are arranged in the second horizontal frame layers, and the tip unit is arranged at the bottom end of the third column.

[0014] Preferably, the riser segment structure comprises a riser lower section, a riser upper section and a hanging flange, the top end of the riser lower section and the bottom end of the riser upper section are both provided with the hanging flange, and the riser lower section is connected to the riser upper section via the hanging flange.

[0015] Preferably, the riser segment structure further includes a temporary suspension member, and the temporary suspension member is arranged at the top end of the riser upper segment.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes a segmented modular design by dividing the conductor frame into a lower segmented structure, a segmented connector, an upper segmented structure and a riser segmented structure, so that the prefabrication of the segments of the conductor frame and the overall assembly can be carried out at different locations, thereby reducing the complexity of on-site construction, and being able to effectively reduce the weight of offshore lifting, thereby reducing the demand for the use of large floating crane resources, thereby also helping to reduce the overall cost of marginal oil field development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the utility model;

[0019] Figure 2 This is a schematic structural diagram of a lower segment structure of one embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the assembly of a segmented connector of one embodiment of the utility model;

[0021] Figure 4 It is an exploded schematic diagram of a segmented connector of one embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of an upper segment structure of one embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of a riser segment structure of one embodiment of the utility model.

[0024] Wherein: lower segment structure 100, segment connector 200, upper segment structure 300, riser segment structure 400, offshore platform module 500, first column 101, second column 102, first oblique connecting rod 103, second oblique connecting rod 104, first horizontal frame layer 105, installation guide unit 202, plug tip unit 201, guide member 204, sealing ring 202, rubber ring 203, conical plug tip 207, bracket structure 206, third column 301, second horizontal frame layer 302, riser lower section 401, riser upper section 403, suspension flange 402, temporary suspension member 404. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0026] A segmented modular offshore jacket platform of this embodiment is shown in FIG. Figure 1 , including a lower segment structure 100, a plurality of segment connectors 200, an upper segment structure 300 and a riser segment structure 400. The upper segment structure 300 and the lower segment structure 100 are arranged up and down, and the upper segment structure 300 and the lower segment structure 100 are connected through the segment connector 200. The riser segment structure 400 is arranged on the inner side of the lower segment structure 100 and the upper segment structure 300. The lower segment is used for fixed connection with the seabed, and the upper segment structure 300 is used for supporting the marine platform module 500.

[0027] This embodiment realizes a segmented modular design by dividing the jacket into a lower segment structure 100, a segment connector 200, an upper segment structure 300 and a riser segment structure 400, so that the prefabrication of the segments of the jacket and the assembly of the whole can be carried out at different locations, reducing the complexity of on-site construction, and can effectively reduce the weight of offshore hoisting, thereby reducing the demand for the use of large floating crane resources, thereby also helping to reduce the overall cost of marginal oil field development. The riser segment structure 400 is fixed to the inner side of the upper segment structure 300 and the lower segment structure 100, which enhances the stability of the overall structure. This design enables the jacket to better resist the influence of natural forces such as waves and currents, ensuring the safe operation of the offshore platform.

[0028] The jacket of this embodiment is suitable for the development of marginal oil fields. The jacket segmentation scheme and the size of each component can be determined according to the conditions of the installation site, so that it can be installed and used in different marine environments and geological conditions, which helps to lower the threshold of oil field development and improve resource utilization.

[0029] Preferably, the lower segment structure 100 is a structure that is wide at the bottom and narrow at the top. Since the lower segment structure 100 is located at the bottom of the jacket, by setting it as a structure that is wide at the bottom and narrow at the top, it can not only enhance the stability of the structure, but also effectively disperse the load borne by the bottom, thereby improving the bearing capacity of the jacket. Among them, the design of the lower width can increase the contact area with the seabed, which is conducive to preventing the foundation from settling or sliding. The structure that gradually narrows at the top optimizes the structural force and saves materials while ensuring overall stability.

[0030] Preferably, refer to the attached Figure 2 The lower segment structure 100 includes 4 first columns 101, 4 second columns 102, 4 first oblique connecting rods 103, 4 second oblique connecting rods 104 and a first horizontal frame layer 105. The multiple first columns 101 are respectively vertically arranged on the outside of the second columns 102, the two ends of the first oblique connecting rod 103 are respectively connected to the top of the second column 102 and the middle of the first column 101, the two ends of the second oblique connecting rod 104 are respectively connected to the middle of the first column 101 and the bottom of the second column 102, and the outer side and the inner side of the first horizontal frame layer 105 are respectively connected to the multiple first columns 101 and the multiple second columns 102.

[0031] Among them, the four vertically arranged first columns 101 are used to connect with the pile foundation; the four vertically arranged second columns 102 are used to support the upper segment structure 300 and the marine platform module 500; the four obliquely arranged first connecting rods 103 are used to make the first column 101 and the second column 102 move downward and improve the structural stability between the first column 101 and the second column 102; the four obliquely arranged second connecting rods are used to connect the first column 101 and the second column 102 and the bottom horizontal layer, further improving the structural stability between the first column 101 and the second column 102; the first horizontal frame layer 105 can be arranged with a plurality of connecting rods as needed, which are used to support the anti-sinking plate and form a horizontal support frame. Therefore, this embodiment ensures the structural stability and bearing capacity of the lower segment structure 100 formed by arranging four first columns 101, four second columns 102, four first oblique connecting rods 103, four second oblique connecting rods 104 and the first horizontal frame layer 105.

[0032] Preferably, refer to the attached Figure 3The segment connector 200 includes an installation guide unit 202 and a plug-in unit 201. The installation guide unit 202 is arranged at the top of the lower segment structure 100, and the plug-in unit 201 is arranged at the bottom of the upper segment structure 300. The upper segment structure 300 is connected to the lower segment structure 100 by the cooperation of the plug-in unit 201 and the installation guide unit 202. By arranging the installation guide unit 202 at the top of the lower segment structure 100 and the plug-in unit 201 at the bottom of the upper segment structure 300, the installation guide unit 202 cooperates with the plug-in unit, which can be used to guide the installation of the upper segment structure 300, ensure that the two segments can be accurately docked, and reduce the difficulty of installation.

[0033] For further information, see Attachment Figure 4 The installation guide unit 202 includes a trumpet-shaped guide member 204, a sealing ring 202 and a rubber ring 203. The sealing ring 202 is arranged on the inner side of the top of the lower segment structure 100, the guide member 204 is fixed on the outer side of the top of the lower segment structure 100, and the rubber ring 203 is arranged on the upper surface of the sealing ring 202. The plug-in unit 201 is in contact with the guide member 204 and the rubber ring 203. By setting the trumpet-shaped guide member 204, it plays a guiding role for the plug-in unit 201 of the upper segment structure 300 during the overall installation, ensuring the accuracy of the plug-in. The sealing ring 202 and the rubber ring 203 are arranged on the inner side of the top of the lower segment structure 100 to ensure that the plug-in unit is fully in contact with the installation guide unit 202 during installation, which is convenient for the subsequent grouting work.

[0034] Furthermore, the plug tip unit 201 includes a conical plug tip 207 and a bracket structure 206. The conical plug tip 207 is arranged at the bottom of the upper segment structure 300, and the bracket structure 206 is arranged on the outside of the conical plug tip 207. The conical plug tip 207 is connected to the installation guide unit 202 through the bracket structure 206. By arranging the conical plug tip 207 at the bottom of the upper segment structure 300, the shape of the conical plug tip 207 matches the inner side of the guide member 204, which facilitates the positioning of the upper segment structure 300 during the installation process, improves the accuracy and efficiency of the installation, and reduces the difficulty of installation. After the upper segment structure 300 and the lower segment structure 100 are connected, by grouting the gap between the conical tip 207 and the sealing ring 202, an annular bracket structure 206 is formed between the conical tip 207 and the guide member 204 and the sealing ring 202, thereby achieving a fixed connection between the lower segment structure 100 and the upper segment structure 300, so that the lower segment structure 100 provides vertical support and grouting sealing for the upper segment structure 300.

[0035] For further information, see Attachment Figure 5The upper segment structure 300 includes four third columns 301 and a plurality of second horizontal frame layers 302, the plurality of second horizontal frame layers 302 are arranged alternately up and down, the four third columns 301 are arranged vertically and distributed on the outside of the second horizontal frame layer 302, a plurality of connecting rods are arranged in the second horizontal frame layer 302, and the plug-in unit 201 is arranged at the bottom of the third column 301. By arranging the four third columns 301 vertically on the outside of the second horizontal frame layer 302 and connecting the second columns 102 of the lower segment structure 100 up and down through the segment connector 200, support is provided for the second horizontal frame layer 302 and the marine platform module 500 above, and the second horizontal frame layer 302 is arranged alternately up and down, further improving the structural stability. A plurality of connecting rods can be installed in the second horizontal frame layer 302 according to the actual strength requirements to improve the stability and bearing capacity of the structure.

[0036] Preferably, refer to the attached Figure 6 The riser segment structure 400 includes a riser lower segment 401, a riser upper segment 403 and a hanging flange 402. The top of the riser lower segment 401 and the bottom of the riser upper segment 403 are both provided with hanging flanges 402, and the riser lower segment 401 and the riser upper segment 403 are connected via the hanging flanges 402. By dividing the riser segment structure 400 into the riser upper segment 403 and the riser lower segment 401, it is convenient to fix the riser upper segment 403 and the riser lower segment 401 on the upper segment structure 300 and the lower segment structure 100 respectively during segment prefabrication, and the riser upper segment 403 and the riser lower segment 401 are simultaneously connected when the upper segment structure 300 and the lower segment structure 100 are connected, and the riser upper segment 403 and the riser lower segment 401 are connected via the hanging flanges 402, which reduces the difficulty of installation.

[0037] Preferably, the riser segment structure 400 further includes a temporary suspension member 404, which is disposed at the top of the riser upper segment 403. The temporary suspension member 404 of this embodiment is a blind flange, which is disposed at the top of the riser upper segment 403 to temporarily seal the riser segment structure 400.

[0038] The specific installation method of the segmented modular offshore jacket platform of this embodiment is as follows: 1. Obtain the geological conditions, environmental loads and weight of the upper offshore platform module 500 of the installation site, preliminarily determine the jacket segmentation plan and the size of each component, and determine the final plan after performing relevant structural calculations and analysis;

[0039] 2. Prefabricate the lower segment structure 100, the segment connector 200, the upper segment structure 300 and the riser segment structure 400 respectively according to the plan at the land construction site; wherein the installation guide unit 202 is connected to the top of the lower segment structure 100 during prefabrication, and the plug-in unit 201 is connected to the bottom of the upper segment structure 300 during prefabrication, and a grouting valve is pre-set on the segment connector 200; and the riser lower section 401 is fixed to the inner side of the lower segment structure 100 by a pipe clamp and a hanging flange 402, and the riser upper section 403 is fixed to the inner side of the upper segment structure 300 by a pipe clamp and a temporary fixing hanging structure;

[0040] 3. Use a barge to transport the prefabricated lower segment structure 100, segment connector 200, upper segment structure 300 and riser segment structure 400 to the installation site;

[0041] 4. After relevant preparations, proceed with offshore installation. Note that you should select a suitable floating crane according to the maximum weight of the hoisting module in advance. The specific installation process is as follows:

[0042] 4-1. Lower the lower segment structure 100 to the seabed using a floating crane;

[0043] 4-2. The upper segment structure 300 is launched into the water by using a floating crane, and the tip units 201 correspond to the installation guide units 202 respectively, so that the upper segment structure 300 and the lower segment structure 100 are connected up and down;

[0044] 4-3. Lower the grouting pipeline and connect it to the reserved grouting valve to grout the gap between the segmented connectors 200 to form a corbel structure 206;

[0045] 5. Carry out piling of the bottom foundation of the jacket;

[0046] 6. Adjust the upper section 403 of the riser and connect and fix it with the lower section 401 of the riser through the docking flange at the lower end of the upper section 403 of the riser.

[0047] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A segmented modular offshore jacket platform, characterized in that: It includes a lower segment structure, a plurality of segment connectors, an upper segment structure and a riser segment structure. The upper segment structure is arranged above and below the lower segment structure. The upper segment structure and the lower segment structure are connected via the segment connectors. The riser segment structure is arranged on the inner side of the lower segment structure and the upper segment structure. The lower segment is used for fixed connection with the seabed, and the upper segment structure is used for supporting the marine platform module.

2. A segmented modular offshore jacket platform according to claim 1, characterized in that: The lower segment structure is a structure that is wider at the bottom and narrower at the top.

3. A segmented modular offshore jacket platform according to claim 1 or 2, characterized in that: The lower segment structure includes a plurality of first columns, a plurality of second columns, a plurality of first oblique connecting rods, a plurality of second oblique connecting rods and a first horizontal frame layer. The plurality of first columns are vertically arranged on the outside of the second columns, respectively. The two ends of the first oblique connecting rod are respectively connected to the top of the second column and the middle of the first column, respectively. The two ends of the second oblique connecting rod are respectively connected to the middle of the first column and the bottom of the second column, and the outer side and the inner side of the first horizontal frame layer are respectively connected to the plurality of first columns and the plurality of second columns.

4. The segmented modular offshore jacket platform according to claim 1, characterized in that: The segmented connector includes an installation guide unit and a tip unit, wherein the installation guide unit is arranged at the top of the lower segment structure, and the tip unit is arranged at the bottom of the upper segment structure, and the upper segment structure is connected to the lower segment structure up and down through the cooperation of the tip unit and the installation guide unit.

5. The segmented modular offshore jacket platform according to claim 4, characterized in that: The installation guide unit includes a trumpet-shaped guide member, a sealing ring and a rubber ring. The sealing ring is arranged on the inner side of the top end of the lower segment structure, the guide member is fixed on the outer side of the top end of the lower segment structure, the rubber ring is arranged on the upper surface of the sealing ring, and the plug-in unit is in contact with the guide member and the rubber ring.

6. The segmented modular offshore jacket platform according to claim 5, characterized in that: The plug tip unit includes a conical plug tip and a corbel structure, wherein the conical plug tip is arranged at the bottom of the upper segment structure, the corbel structure is arranged on the outside of the conical plug tip, and the conical plug tip is connected to the installation guide unit via the corbel structure.

7. A segmented modular offshore jacket platform according to claim 4, 5 or 6, characterized in that: The upper segmented structure includes a plurality of third columns and a plurality of second horizontal frame layers, wherein the plurality of second horizontal frame layers are alternately arranged up and down, and a plurality of third columns are vertically arranged and distributed on the outside of the second horizontal frame layers, and a plurality of connecting rods are arranged in the second horizontal frame layers, and the tip unit is arranged at the bottom end of the third column.

8. The segmented modular offshore jacket platform according to claim 1, characterized in that: The riser segment structure comprises a riser lower section, a riser upper section and a hanging flange. The top end of the riser lower section and the bottom end of the riser upper section are both provided with the hanging flange, and the riser lower section is connected to the riser upper section via the hanging flange.

9. The segmented modular offshore jacket platform according to claim 8, characterized in that: The riser segment structure also includes a temporary suspension member, which is arranged at the top end of the riser upper segment.

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