A construction method for an FPSO oil and gas processing module

Abstract

The present invention relates to the technical field of offshore oil module construction, and particularly relates to a construction method for an FPSO oil and gas processing module. This method disassembles the oil and gas processing module into multiple modules, constructs the multiple modules on site, moves the constructed modules to a position near the quay at the front of the slipway, and then hoists and assembles them onto an offshore oil and gas platform on one side of the quay. The multiple modules are assembled on the offshore oil and gas platform, thereby completing the construction of the oil and gas processing module. This method does not require the overall oil and gas processing module to be constructed on site, has relatively low requirements for the height of the site, so the upfront infrastructure investment of the module construction manufacturer is relatively small, and there is no need for a taller and larger factory building to meet the completion of the overall module construction, reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore oil module construction, and in particular to a construction method for an FPSO oil and gas processing module. Background Art

[0002] An FPSO (Floating Production Storage and Offloading), namely a floating production, storage and offloading unit, can conduct preliminary processing and storage of crude oil, and is called an "offshore oil factory".

[0003] During the module construction process, module construction manufacturers generally complete the construction of the overall module in the workshop, then transport the whole module to the transport ship through an axle vehicle, and then install it after transporting it to the destination where the main hull manufacturer is berthed by the transport ship. During the construction of each layer of the module, after quickly completing the erection of the main structure framework, the equipment, pipelines, electrical instruments, outfitting parts, etc. of each layer are installed separately.

[0004] The above construction process requires overall construction in the workshop, which has relatively high requirements for the height of the workshop. That is to say, the module construction manufacturer has a large upfront infrastructure investment and needs a higher and larger workshop to meet the overall construction of the module, resulting in increased costs. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a construction method for an FPSO oil and gas processing module to solve the problem of increased costs.

[0006] Based on the above purpose, the present invention provides a construction method for an FPSO oil and gas processing module, including,

[0007] A construction site;

[0008] Constructing multiple modules at the site: including:

[0009] Constructing a single module: including:

[0010] Constructing a layer of the main structure, including:

[0011] Constructing a first section of a layer and a second section of a layer, transporting them to the slipway erection area for positioning and erection, and positioning and erecting the first section of a layer and the second section of a layer at the module erection position for overall assembly, and continuing to install outfitting parts and equipment, thereby completing the construction of a layer of the main structure;

[0012] Constructing a second layer of the main structure, including:

[0013] Constructing a first section of the second layer and a second section of the second layer, and hoisting them onto the first layer of the main structure for overall assembly, and continuing to install outfitting parts and equipment, thereby completing the construction of the second layer of the main structure;

[0014] Construct the main structure of the flat top, including:

[0015] Construct the first section and the second section of the flat top, hoist them to the main structure on the second floor for general assembly, and continue to install outfitting parts and equipment, thus completing the construction of the main structure of the flat top;

[0016] According to the site layout plan, continue to install outfitting parts and equipment, and perform the final paint touch-up operation after all structure welding and mating are completed, thus completing the module construction;

[0017] Module transportation: Move each completed module to a position close to the dock at the front of the slideway through transportation equipment;

[0018] Module hoisting: Hoist and assemble multiple modules onto the offshore oil and gas platform on one side of the dock, thus completing the construction of the oil and gas treatment module.

[0019] Optionally, there are N - 2 layers of structures between the main structure on the second floor and the main structure of the flat top, where N > 2, and the construction method of each layer of the N - 2 layer structure is the same as that of the main structure on the second floor.

[0020] Optionally, construct the main structure on the first floor, including:

[0021] Construct the first section on the first floor: Construct the first sheet on the first floor, after completion, perform a 180-degree rollover on the slideway in sequence, perform sandblasting and painting in the normal state, transport it to the slideway mating area for positioning and mating after painting, then hoist and install columns and diagonal braces on the normal first sheet on the first floor, and continue to install some outfitting parts and equipment on the normal first sheet on the first floor for pre-outfitting;

[0022] Construct the second section on the first floor: Construct the second sheet on the first floor, after completion, perform a 180-degree rollover on the slideway in sequence, perform sandblasting and painting in the normal state, transport it to the slideway mating area for positioning and mating after painting, then hoist and install columns and diagonal braces on the normal second sheet on the first floor, and continue to install some outfitting parts and equipment on the normal second sheet on the first floor for pre-outfitting;

[0023] According to the site layout plan, the first section and the second section on the first floor are positioned and mated at the module mating position for general assembly, and continue to install outfitting parts and equipment, thus completing the construction of the main structure on the first floor.

[0024] Optionally, construct the main structure on the second floor, including:

[0025] Construct the first second - floor section: Construct the first second - floor panel. After completion, perform a 180 - degree turnover on the slideway, hoist and install the columns and diagonal braces on the normal - state first second - floor panel, carry out sandblasting and painting operations, transport the normal - state first second - floor panel to the slideway loading area and hoist it onto the first - floor main structure for installation, and continue to install outfitting parts and equipment on the normal - state first second - floor panel for pre - outfitting;

[0026] Construct the second second - floor section: Construct the second second - floor panel. After completion, perform a 180 - degree turnover on the slideway, hoist and install the columns and diagonal braces on the normal - state second second - floor panel, carry out sandblasting and painting operations, transport the normal - state second second - floor panel to the slideway loading area and hoist it onto the first - floor main structure for installation, and continue to install outfitting parts and equipment on the normal - state second second - floor panel for pre - outfitting;

[0027] According to the site layout plan, the first and second second - floor sections are assembled on the first - floor main structure, and continue to install outfitting parts and equipment, thus completing the construction of the second - floor main structure.

[0028] Optionally, construct the flat - topped main structure, including:

[0029] Construct the first flat - topped section: Construct the first flat - topped panel. After completion, perform a 180 - degree turnover on the slideway, carry out sandblasting and painting operations, transport the normal - state first flat - topped panel to the slideway loading area and hoist it onto the second - floor main structure for installation, and continue to install outfitting parts and equipment on the normal - state first flat - topped panel for pre - outfitting;

[0030] Construct the second flat - topped section: Construct the second flat - topped panel. After completion, perform a 180 - degree turnover on the slideway, carry out sandblasting and painting operations, transport the normal - state second flat - topped panel to the slideway loading area and hoist it onto the second - floor main structure for installation, and continue to install outfitting parts and equipment on the normal - state second flat - topped panel for pre - outfitting;

[0031] According to the site layout plan, the first and second flat - topped sections are assembled on the second - floor main structure, and continue to install outfitting parts and equipment, thus completing the construction of the flat - topped main structure.

[0032] Optionally, construct the top main structure, including:

[0033] Construct the top panel, hoist and install the columns and diagonal braces. After completion, perform a 180 - degree turnover on the slideway, carry out sandblasting and painting operations, transport the normal - state top panel to the slideway loading area, continue to install outfitting parts and equipment for pre - outfitting, then hoist it onto the flat - topped main structure for installation, and continue to install outfitting parts and equipment, thus completing the construction of the top main structure.

[0034] Optionally, when constructing the site, carry out corresponding site resource allocation.

[0035] Optionally, the erected columns and braces are those that have been individually painted.

[0036] Optionally, the sandblasting and painting operations are carried out in a painting workshop.

[0037] Optionally, the transportation equipment is a hydraulic trolley or an SPMT axle line vehicle.

[0038] Advantages of the present invention: The construction method of an FPSO oil and gas treatment module provided by the present invention disassembles the oil and gas treatment module into multiple modules. The multiple modules are constructed on-site, and the constructed modules are moved to the front of the slideway near the dock, and then hoisted and assembled onto the offshore oil and gas platform on one side of the dock. The multiple modules are assembled on the offshore oil and gas platform, thus completing the construction of the oil and gas treatment module. This method does not require the overall oil and gas treatment module to be constructed on-site, has relatively low requirements for the height of the site, so the upfront infrastructure investment of the module construction manufacturer is relatively small, does not require a taller and larger workshop to complete the overall construction of the module, reduces costs and avoids material waste, and improves the construction efficiency. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a schematic installation structure diagram of the first section on the first layer of the present invention;

[0041] Figure 2 It is a schematic installation structure diagram of the second section on the first layer of the present invention;

[0042] Figure 3 It is a schematic installation structure diagram of the first section on the second layer of the present invention;

[0043] Figure 4 It is a schematic installation structure diagram of the second section on the second layer of the present invention;

[0044] Figure 5 It is a schematic installation structure diagram of the first section of the flat secondary roof of the present invention;

[0045] Figure 6 It is a schematic installation structure diagram of the second section of the flat secondary roof of the present invention;

[0046] Figure 7 It is a schematic installation structure diagram of the top main structure of the present invention;

[0047] Figure 8Schematic structural diagram of the module of the present invention.

[0048] In the figure: 1. Main structure of the first layer; 11. First section of the first layer; 12. Second section of the first layer; 13. First sheet of the first layer; 14. Second sheet of the first layer; 2. Main structure of the second layer; 21. First section of the second layer; 22. Second section of the second layer; 23. First sheet of the second layer; 24. Second sheet of the second layer; 3. Main structure of the flat secondary roof; 31. First section of the flat secondary roof; 32. Second section of the flat secondary roof; 33. First sheet of the flat secondary roof; 34. Second sheet of the flat secondary roof; 4. Main structure of the top; 41. Top sheet. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0050] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings understood by those of ordinary skill in the art to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0051] As Figures 1 to 8 shown, a construction method for an FPSO oil and gas treatment module includes:

[0052] Construction site;

[0053] Constructing multiple modules at the site, including:

[0054] Constructing a single module, including:

[0055] Constructing the main structure 1 of the first layer, including:

[0056] Constructing the first section 11 and the second section 12 of the first layer, transporting them to the slideway loading area for positioning and loading, and positioning and loading the first section 11 and the second section 12 of the first layer at the module loading position for general assembly, and then continuing to install outfitting parts and equipment, so as to complete the construction of the main structure 1 of the first layer;

[0057] Construct the second - floor main structure 2, including:

[0058] Construct the first section 21 and the second section 22 of the second floor, hoist them onto the first - floor main structure 1 for general assembly, and continue to install outfitting parts and equipment, thus completing the construction of the second - floor main structure 2;

[0059] Construct the flat - top main structure 3, including:

[0060] Construct the first section 31 and the second section 32 of the flat - top, hoist them onto the second - floor main structure 2 for general assembly, and continue to install outfitting parts and equipment, thus completing the construction of the flat - top main structure 3;

[0061] According to the site layout plan, continue to install outfitting parts and equipment. After all the structural welding and outfitting are completed, carry out the final paint touch - up operation, thus completing the module construction;

[0062] Module transportation: Move each completed module to a position near the quay edge of the slipway through transportation equipment;

[0063] Module hoisting: Hoist and assemble multiple modules onto the offshore oil and gas platform on one side of the quay, thus completing the construction of the oil and gas treatment module.

[0064] This method splits the oil and gas treatment module into multiple modules. The multiple modules are constructed on the site, and the completed modules are moved to a position near the quay edge of the slipway, and then hoisted and assembled onto the offshore oil and gas platform on one side of the quay. The assembly of multiple modules is carried out on the offshore oil and gas platform, thus completing the construction of the oil and gas treatment module. This method does not require the construction of the overall oil and gas treatment module on the site, has relatively low requirements for the height of the site, so the upfront infrastructure investment of the module construction manufacturer is relatively small, and there is no need for a higher and larger factory building to meet the completion of the overall module construction. In addition, the construction sequence of multiple modules reduces the maintenance time and more likely reduces the possibility of the overall demolition and reinstallation project, reduces costs and avoids material waste, and improves the construction efficiency.

[0065] As Figures 1 to 8 shown, a construction method of an FPSO oil and gas treatment module includes:

[0066] Construct the construction site and the corresponding site resource allocation, and elaborate on the construction methods of each different - type module in detail, so as to more reasonably and efficiently achieve the smooth delivery of the module according to the planned requirements;

[0067] According to the site resources, carry out the construction of multiple modules on the site: including:

[0068] The construction of a single module; including:

[0069] Construct the first - floor main structure 1, including:

[0070] Construct the first section 11 of the first floor: Construct the first sheet 13 of the first floor (the first sheet 13 of the first floor is constructed in the reverse direction). After completion, turn it over 180 degrees on the slideway in sequence, install some outfitting parts in the normal state, transport it to the painting workshop in the normal state for sandblasting and painting operations. After painting, transport it to the slideway loading area in the site for positioning and loading. Then, hoist and install the columns and diagonal braces that have been painted separately on the normal first sheet 13 of the first floor. Continue to install some outfitting parts and equipment on the normal first sheet 13 of the first floor for pre-outfitting;

[0071] Construct the second section 12 of the first floor: Construct the second sheet 14 of the first floor (the second sheet 14 of the first floor is constructed in the reverse direction). After completion, turn it over 180 degrees on the slideway in sequence, install some outfitting parts in the normal state, transport it to the painting workshop in the normal state for sandblasting and painting operations. After painting, transport it to the slideway loading area for positioning and loading. Then, hoist and install the columns and diagonal braces that have been painted separately on the normal second sheet 14 of the first floor. Continue to install some outfitting parts and equipment on the normal second sheet 14 of the first floor for pre-outfitting;

[0072] According to the site layout plan, the first section 11 of the first floor and the second section 12 of the first floor are positioned and loaded at the module loading position for general assembly, and continue to install outfitting parts and equipment, thus completing the construction of the main structure 1 of the first floor;

[0073] Construct the main structure 2 of the second floor, including:

[0074] Construct the first section 21 of the second floor: Construct the first sheet 23 of the second floor (the first sheet 23 of the second floor is constructed in the reverse direction). After completion, turn it over 180 degrees on the slideway in sequence, install outfitting parts in the normal state, hoist and install the columns and diagonal braces that have been painted separately on the normal first sheet 23 of the second floor. Transport it to the painting workshop in the normal state for sandblasting and painting operations. Transport the normal first sheet 23 of the second floor to the slideway loading area and hoist it onto the main structure 1 of the first floor for installation. Continue to install outfitting parts and equipment on the normal first sheet 23 of the second floor for pre-outfitting;

[0075] Construct the second section 22 of the second floor: Construct the second sheet 24 of the second floor (the second sheet 24 of the second floor is constructed in the reverse direction). After completion, turn it over 180 degrees on the slideway in sequence, install outfitting parts in the normal state, hoist and install the columns and diagonal braces that have been painted separately on the normal second sheet 24 of the second floor. Transport it to the painting workshop in the normal state for sandblasting and painting operations. Transport the normal second sheet 24 of the second floor to the slideway loading area and hoist it onto the main structure 1 of the first floor for installation. Continue to install outfitting parts and equipment on the normal second sheet 24 of the second floor for pre-outfitting;

[0076] According to the site layout plan, the first section 21 of the second floor and the second section 22 of the second floor are generally assembled on the main structure 1 of the first floor, and continue to install outfitting parts and equipment, thus completing the construction of the main structure 2 of the second floor;

[0077] Construct the main structure 3 of the flat top, including:

[0078] Construct the first section 31 of the flat top: Construct the first sheet 33 of the flat top (the first sheet 33 of the flat top is constructed in reverse). After completion, perform a 180-degree turn on the slideway in sequence, install outfitting parts in the normal state, transport them to the painting workshop in the normal state for sandblasting and painting operations, transport the normal first sheet 33 of the flat top to the slideway loading area and hoist it onto the second-layer main structure 2 for installation, and continue to install outfitting parts and equipment on the normal first sheet 33 of the flat top for pre-outfitting;

[0079] Construct the second section 32 of the flat top: Construct the second sheet 34 of the flat top (the second sheet 34 of the flat top is constructed in reverse). After completion, perform a 180-degree turn on the slideway in sequence, install outfitting parts in the normal state, transport them to the painting workshop in the normal state for sandblasting and painting operations, transport the normal second sheet 34 of the flat top to the slideway loading area and hoist it onto the second-layer main structure 2 for installation, and continue to install outfitting parts and equipment on the normal second sheet 34 of the flat top for pre-outfitting;

[0080] According to the site layout plan, the first section 31 and the second section 32 of the flat top are assembled on the second-layer main structure 2, and continue to install outfitting parts and equipment, so as to complete the construction of the main structure 3 of the flat top;

[0081] Construct the main structure 4 of the top, including:

[0082] Construct the top sheet 41 (the top sheet 41 is constructed in reverse), hoist and install the columns and diagonal braces that have been painted separately. After completion, perform a 180-degree turn on the slideway in sequence, install outfitting parts in the normal state, transport them to the painting workshop in the normal state for sandblasting and painting operations, transport the normal top sheet 41 to the slideway loading area, continue to install outfitting parts and equipment for pre-outfitting, and then hoist it onto the main structure 3 of the flat top for installation, and continue to install outfitting parts and equipment, so as to complete the construction of the main structure 4 of the top;

[0083] According to the site layout plan, continue to install outfitting parts and equipment, such as module side ladder towers, top small outfitting platforms, and other small structural parts, etc. After all the structures are welded and loaded, perform the final paint touch-up operation, so as to complete the module construction;

[0084] Module transportation: Each completed module can be moved to a position close to the dock at the front of the slideway through transportation equipment such as hydraulic trolleys or SPMT axle lines;

[0085] Module hoisting onto the offshore oil and gas platform: After each module is moved to the dock area at the front of the slideway, it will be hoisted onto the offshore oil and gas platform as a whole by a floating crane. Multiple modules will be assembled onto the offshore oil and gas platform to complete the construction of the oil and gas treatment module. In addition, when selecting a floating crane, a floating crane that meets the module weight and hoisting requirements should be chosen. According to the module and main hull parameters, etc., a 5000t or 3000t large floating crane is preferred. At the same time, the sling configuration should also be selected to meet the corresponding requirements.

[0086] This module construction plan generally ensures the smooth implementation of the project as planned, optimizes the construction sequence and reasonable layout of the site, and has a beneficial effect on project cost control. In addition, there is a large range of floating cranes to choose from and many manufacturers of transportation equipment to choose from, avoiding the uniqueness of external resource selection and greatly saving the project construction cost.

[0087] Those of ordinary skill in the art should understand that: The discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples. The present invention is not limited to the above-described embodiments, that is, it does not mean that the present invention must rely on the above methods and structures to be implemented; within the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail.

[0088] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A construction method for an FPSO oil and gas processing module, characterized in that, including, construction site; carrying out construction of multiple modules at the site, including: construction of a single module, including: construction of the main structure of one layer, including: constructing the first section and the second section of one layer, transporting them to the slipway loading area for positioning and loading, positioning and loading the first section and the second section of one layer at the module loading position for overall assembly, and continuing to install outfitting parts and equipment to complete the construction of the main structure of one layer; construction of the main structure of one layer, including: constructing the first section of one layer: constructing the first sheet of one layer, after completion, successively carrying out 180-degree turning over on the slipway, sandblasting and painting in the normal state, transporting the painted one to the slipway loading area for positioning and loading, then hoisting and installing columns and diagonal braces on the normal first sheet of one layer, and continuing to install some outfitting parts and equipment on the normal first sheet of one layer for pre-outfitting; constructing the second section of one layer: constructing the second sheet of one layer, after completion, successively carrying out 180-degree turning over on the slipway, sandblasting and painting in the normal state, transporting the painted one to the slipway loading area for positioning and loading, then hoisting and installing columns and diagonal braces on the normal second sheet of one layer, and continuing to install some outfitting parts and equipment on the normal second sheet of one layer for pre-outfitting; According to the site layout plan, the first section and the second section of one layer are positioned and loaded at the module loading position for overall assembly, and continue to install outfitting parts and equipment to complete the construction of the main structure of one layer; constructing the main structure of the second layer, including: constructing the first section and the second section of the second layer, hoisting them onto the main structure of the first layer for overall assembly, and continuing to install outfitting parts and equipment to complete the construction of the main structure of the second layer; constructing the main structure of the flat top, including: constructing the first section and the second section of the flat top, hoisting them onto the main structure of the second layer for overall assembly, and continuing to install outfitting parts and equipment to complete the construction of the main structure of the flat top; According to the site layout plan, continue to install outfitting parts and equipment, and carry out the final paint touch-up operation after all the structures are welded and loaded to complete the module construction; Module transportation: Moving each completed module to a position close to the dock at the front of the slipway through transportation equipment; Module hoisting: Hoisting and assembling multiple modules onto the offshore oil and gas platform on one side of the dock to complete the construction of the oil and gas treatment module.

2. The construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that, There are N - 2 layers of structures between the main structure of the second layer and the main structure of the flat top, where N > 2, and the construction method of each layer of the N - 2 layers of structures is the same as that of the main structure of the second layer.

3. A construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that constructing the main structure of the second layer, including: constructing the first section of the second layer: constructing the first sheet of the second layer, after completion, successively carrying out 180-degree turning over on the slipway, hoisting and installing columns and diagonal braces on the normal first sheet of the second layer, carrying out sandblasting and painting operations, transporting the normal first sheet of the second layer to the slipway loading area and hoisting it onto the main structure of the first layer for installation, and continuing to install outfitting parts and equipment on the normal first sheet of the second layer for pre-outfitting; Construct the second section of the second layer: Construct the second sheet of the second layer. After completion, turn it over 180 degrees on the slideway, hoist and install the columns and diagonal braces on the second sheet of the second layer in the normal state, carry out sandblasting and painting operations, transport the second sheet of the second layer in the normal state to the slideway loading area and hoist it onto the main structure of the first layer for installation, and continue to install outfitting parts and equipment on the second sheet of the second layer in the normal state for pre-outfitting; According to the site layout plan, the first section and the second section of the second layer are assembled on the main structure of the first layer, and outfitting parts and equipment are continuously installed to complete the construction of the main structure of the second layer.

4. A construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that Construct the main structure of the flat top, including: Construct the first section of the flat top: Construct the first sheet of the flat top. After completion, turn it over 180 degrees on the slideway, carry out sandblasting and painting operations, transport the first sheet of the flat top in the normal state to the slideway loading area and hoist it onto the main structure of the second layer for installation, and continue to install outfitting parts and equipment on the first sheet of the flat top in the normal state for pre-outfitting; Construct the second section of the flat top: Construct the second sheet of the flat top. After completion, turn it over 180 degrees on the slideway, carry out sandblasting and painting operations, transport the second sheet of the flat top in the normal state to the slideway loading area and hoist it onto the main structure of the second layer for installation, and continue to install outfitting parts and equipment on the second sheet of the flat top in the normal state for pre-outfitting; According to the site layout plan, the first section and the second section of the flat top are assembled on the main structure of the second layer, and outfitting parts and equipment are continuously installed to complete the construction of the main structure of the flat top.

5. A construction method of an FPSO oil and gas treatment module according to claim 1 or 4, characterized in that Construct the main structure of the top, including: Construct the top sheet, hoist and install the columns and diagonal braces. After completion, turn it over 180 degrees on the slideway, carry out sandblasting and painting operations, transport the top sheet in the normal state to the slideway loading area, continue to install outfitting parts and equipment for pre-outfitting, then hoist it onto the main structure of the flat top for installation, and continue to install outfitting parts and equipment to complete the construction of the main structure of the top.

6. A construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that, When constructing the site, carry out corresponding site resource allocation.

7. A construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that, The hoisted and installed columns and diagonal braces are the columns and diagonal braces that have been painted separately.

8. A construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that, The sandblasting and painting operations are carried out in the painting room.

9. A construction method of an FPSO oil and gas treatment module according to claim 1, characterized in that, The transportation equipment is a hydraulic trolley or an SPMT axle line vehicle.

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