A method for installing a stand-alone turret module on an FPSO

Abstract

The application discloses a method for installing a vertical tank of an FPSO upper module, which comprises the following steps: after planning a sliding path in advance, horizontal tank equipment is slid into the module by means of a side installation platform, a slide rail, a roller trolley and the like, an eye plate is welded at the lower part of a structural beam directly above a lifting shaft and a tail lifting point of the vertical tank equipment, and the vertical tank equipment is turned over in the module by selecting appropriate cables such as a reverse chain, a steel wire rope and a lifting belt, and finally, the vertical tank equipment is accurately positioned by small-angle adjustment; when the upper space of the vertical tank equipment is sufficient, the sliding path can be selected according to the principles of convenience of field construction, less reserved bars and small construction interference, and the small-angle adjustment requirement is not needed. The angle adjustment of the equipment is completed by welding a lifting point at the structural beam directly above the center point of the vertical tank equipment and by means of a universal lifting hook, a reverse chain and the like. The method for installing the vertical tank of the FPSO upper module provided by the application effectively saves construction cost and reduces construction cost.

Description

Technical Field

[0001] This invention belongs to the field of marine oil engineering technology, and particularly relates to a method for installing a vertical tank on the top module of an FPSO. Background Technology

[0002] FPSO topside modules are characterized by multiple deck layers and relatively small vertical tank units (around 20 tons). During construction, the deck layers of the topside module are built in a manner similar to assembling building blocks. After each deck layer is hoisted and integrated, but before the upper deck layer is hoisted and integrated, the vertical tank unit for that deck layer needs to be installed. The vertical tank units are transported horizontally and then turned over and hoisted at the construction site. However, due to various factors, the delivery of the vertical tank units is often delayed. By this time, the upper deck layers have already been hoisted and integrated, and the hoisting path for the vertical tank units is obstructed.

[0003] The common practice is to create a skylight in the upper deck of the vertical tank equipment, through which the equipment is hoisted. Sometimes, however, equipment delivery is severely delayed, and the upper module's deck panels are almost fully assembled. In such cases, skylights need to be created in all the upper decks, and the equipment needs to be hoisted through multiple decks.

[0004] Therefore, a large number of structural members need to be reserved and removed. After the equipment is hoisted, the reserved and removed areas need to be restored. Construction work of all disciplines in the affected area will be suspended, which will seriously affect the integrated construction progress of the modules and increase construction costs. In addition, the turning over of the vertical tank equipment and the hoisting across the layers are time-consuming and the crane occupancy rate is high, which further increases the construction cost.

[0005] Therefore, there is an urgent need to design a method for vertical tank installation of the FPSO upper module to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a method for installing the vertical tank of the FPSO upper module, which has the advantages of not affecting the construction of other disciplines, greatly reducing the amount of pre-reserved rods, and using simple tools and equipment, thus solving the problems existing in the background technology.

[0007] To achieve the above objectives, the specific technical solution for the vertical tank installation method of the FPSO upper module of the present invention is as follows: A method for installing a vertical tank on an FPSO upper module mainly includes the following steps: S1. Plan the sliding path according to the position of the vertical tank equipment in the module, and clear the potential collision rods on the sliding path and when the vertical tank equipment is turned over in advance; when selecting the sliding path, try to ensure that after the vertical tank equipment is turned over inside the module, it does not need to rotate or only needs to rotate at a small angle to ensure that the tank nozzle is facing accurately, that is, the positioning is correct. S2. Arrange a side-loading platform with a certain load-bearing capacity on the designed sliding path, lay slide rails with sufficient strength, and place several roller trolleys with sufficient load-bearing capacity in the slide rails according to the size and distribution of the vertical tank transport saddle. S3. Select appropriate lifting slings and use a crawler crane to lift the vertical tank equipment to the side loading platform. The vertical tank transport saddle should fall precisely on the pre-arranged roller trolley. S4. Select appropriate towing slings, including hand chain hoists, slings, and shackles. Hook one end of the sling onto the vertical tank equipment and wrap the other end around the load-bearing column inside the module. By continuously shortening the length of the towing slings, the vertical tank equipment can be slid into the module. S5. Stop sliding when the line connecting the centers of the two lifting shafts of the vertical tank equipment is directly above the center line of the vertical tank structure base. S6. Weld the first lifting eye plate and the second lifting eye plate directly above the two lifting shafts of the vertical tank equipment, and weld the tail-running eye plate directly above the tail-running lifting point of the vertical tank equipment. S7. Select appropriate tail-running rigging and lifting rigging, and connect the tail-running eye plate and tail-running lifting point from top to bottom respectively, and connect the first lifting eye plate, the second lifting eye plate and the lifting shaft; S8. Loosen the bolt connection between the vertical tank transport saddle and the vertical tank equipment body; simultaneously pull the tail sling and the first and second hand chain hoists in the lifting sling, and simultaneously lift the vertical tank equipment to a certain height, then remove the vertical tank transport saddle and roller trolley. S9. Simultaneously loosen the tailing rigging, pull up the lifting rigging, and turn the tank over until the vertical tank equipment is completely vertical; S10. Disconnect the tailing sling from the tailing lifting point, simultaneously loosen the lifting sling, and slowly lower the vertical tank equipment, but without contacting the upper surface of the vertical tank structure base. S11. Use rigging to make small-angle adjustments to the equipment along the tangent of the tank body; simultaneously loosen and release the lifting rigging to lower the vertical tank equipment onto the vertical tank structure base; S12. Install anchor bolts, retrieve tools and equipment, and complete the installation of the vertical tank equipment.

[0008] Furthermore, the slide rail is composed of upper channel steel and lower H-beam steel spot welded together. The two parallel rails are connected by channel steel for reinforcement. The length of the slide rail needs to ensure that the vertical tank equipment can slide from the side loading platform to the turning position, and the width depends on the size of the vertical tank transport saddle.

[0009] Furthermore, the tail rigging consists of, from top to bottom, the first shackle, the first hand chain hoist, the second shackle, the sling, and the third shackle.

[0010] Furthermore, the lifting rigging, from top to bottom, consists of the fourth shackle, the second hand chain hoist, the fifth shackle, and the first wire rope.

[0011] Furthermore, when there is sufficient space above the vertical tank equipment, the angle adjustment does not require the selection of a sliding path as specified in S1. Instead, the selection can be made based on the principles of convenient on-site construction, minimal pre-reserved rods, and minimal construction interference.

[0012] Furthermore, when there is sufficient space above the vertical tank equipment, the vertical tank equipment can be directly placed on the vertical tank structure base in S10; after the lifting slings are released, the equipment angle can be adjusted through the intermediate lifting point and the rotating slings.

[0013] Furthermore, the intermediate lifting point is welded to the structural beam or temporary beam directly above the center of the vertical tank equipment.

[0014] Furthermore, the connection between the intermediate lifting point and the swivel rigging, from top to bottom, is as follows: intermediate lifting point, universal hook, sixth shackle, third hand chain hoist, seventh shackle, and second wire rope.

[0015] The vertical tank installation method for the FPSO upper module of the present invention has the following advantages: (1) This invention avoids the need for multiple skylights in the module, thus reducing the workload of cutting and restoring structural members.

[0016] (2) This invention reduces construction interference to other disciplines and ensures the degree of integrated construction of modules.

[0017] (3) The present invention eliminates the need for crawler cranes to turn over or pass through layers, thus reducing the occupancy rate of large cranes.

[0018] (4) The machine tool of the present invention is simple and highly feasible to operate, and can be promoted in the field of FPSO upper module construction.

[0019] (5) The present invention effectively saves construction costs and labor costs, and reduces construction costs. Attached Figure Description

[0020] Figure 1 This is a top view of the side-mounted platform and slide rail arrangement of the present invention; Figure 2 This is a schematic diagram of the arrangement of the slide rails and roller trolleys of the present invention; Figure 3 This is a top view of the device of the present invention being hoisted onto the side-mounted platform; Figure 4 This is a side view of the device of the present invention being hoisted onto the side-mounted platform; Figure 5 This is a schematic diagram of the sliding and dragging mechanism of the device of the present invention; Figure 6 This is a schematic diagram of the initial flipping of the device of the present invention; Figure 7 This is a schematic diagram of the eye plate arrangement at the bottom of the upper deck structure beam of the present invention; Figure 8This is a schematic diagram of the turning rigging connection of the equipment of the present invention; Figure 9 This is a schematic diagram of the turning process of the device of the present invention; Figure 10 This is a schematic diagram showing the device of the present invention completing its flipping process; Figure 11 This is a schematic diagram of the rotation of the single-point lifting auxiliary equipment of the present invention; Figure 12 This is a schematic diagram of the rotating rigging connection of the single-point auxiliary equipment of the present invention.

[0021] Explanation of markings in the diagram: 1. Module; 2. Side mounting platform; 3. Slide rail; 31. Upper channel steel; 32. Lower H-beam; 4. Vertical tank structure base; 5. Roller trolley; 6. Steel pad; 7. Crawler crane; 8. Vertical tank equipment; 81. Vertical tank transport saddle; 82. Equipment lifting shaft; 83. Equipment tail lifting point; 9. Lifting slings; 10. Towing slings; 11. Deck; 12. Towing load-bearing column; 13. Tail lifting plate; 14. First lifting plate; 15. Second lifting plate; 16. Temporary beam; 17. Tail-end sling; 171. First shackle; 172. First chain hoist; 173. Second shackle; 174. Sling; 175. Third shackle; 18. Lifting sling; 181. Fourth shackle; 182. Second chain hoist; 183. Fifth shackle; 184. First wire rope; 19. Intermediate lifting point; 20. Slewing sling; 201. Universal hook; 202. Sixth shackle; 203. Third chain hoist; 204. Seventh shackle; 205. Second wire rope. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0024] The following is a reference to the appendix. Figure 1 To be continued Figure 12 The present invention describes a method for vertical tank installation of the FPSO upper module.

[0025] The vertical tank installation method for the FPSO upper module in this invention mainly includes the following steps: S1. Plan the sliding path according to the position of the vertical tank equipment 8 in module 1, and clear any potential collision rods on the sliding path and when the vertical tank equipment 8 turns over. When selecting the sliding path, try to ensure that after the vertical tank equipment 8 has turned over inside module 1, it does not need to rotate or only needs to rotate at a small angle to ensure that the nozzle of the tank is facing accurately, that is, the positioning is correct.

[0026] S2, such as Figure 1 As shown, a side-mounted platform 2 with a certain load-bearing capacity is arranged on the designed sliding path, a slide rail 3 with sufficient strength is laid, and several roller trolleys 5 with sufficient load-bearing capacity are placed in the slide rail 3 according to the size and distribution of the vertical tank transport saddle 81.

[0027] like Figure 2 As shown, the slide rail 3 is composed of an upper channel steel 31 and a lower H-beam steel 32, spot-welded together. The two parallel rails are connected by channel steel for reinforcement. The length of the slide rail 3 needs to ensure that the vertical tank equipment 8 can slide from the side loading platform 2 to the overturning position, and the width depends on the dimensions of the vertical tank transport saddle 81.

[0028] like Figure 6 As shown, when the vertical tank transport saddle 81 slides to the overturning position, it is very close to the vertical tank structure base 4.

[0029] To ensure the overall stability of slide rail 3, such as Figure 2 As shown, the upper channel steel 31 will be laid on the vertical tank structure base 4, and the gaps will be filled with steel pads 6 of appropriate thickness.

[0030] S3, such as Figure 3 and 4 As shown, select appropriate slings 9 and use crawler crane 7 to lift the vertical tank equipment 8 onto the side loading platform 2. The vertical tank transport saddle 81 lands precisely on the pre-positioned roller trolley 5.

[0031] S4, such as Figure 5 As shown, a suitable towing sling 10, including a hand chain hoist, sling, and shackle, is selected. One end of the sling is hooked onto the vertical tank equipment 8, and the other end is wrapped around the towing support column 12 inside the module 1. By continuously shortening the length of the towing sling 10, the vertical tank equipment 8 is slid into the module 1.

[0032] The drag-bearing column 12 can be an existing structural column inside module 1, or a temporary structure with a certain strength composed of H-beams, etc.

[0033] S5, such as Figure 6As shown, the sliding stops when the line connecting the centers of the two lifting shafts 82 of the vertical tank equipment is directly above the center line of the base 4 of the vertical tank structure.

[0034] S6. Weld the first lifting eye plate 14 and the second lifting eye plate 15 directly above the two lifting shafts 82 of the vertical tank equipment, and weld the tail-running eye plate 13 directly above the tail-running lifting point 83 of the vertical tank equipment.

[0035] like Figure 7 As shown, sometimes there is no structural beam to support the tail-walking eye plate 13, the first lifting eye plate 14, and the second lifting eye plate 15. In this case, a temporary beam 16 with sufficient strength can be used to support their roots.

[0036] S7. Select appropriate tail-walking rigging 17 and lifting rigging 18, and connect the tail-walking eye plate 13 and tail-walking lifting point 83 from top to bottom respectively, and connect the first lifting eye plate 14, the second lifting eye plate 15 and the lifting shaft 82.

[0037] Among them, the tail-walking rigging 17 and the lifting rigging 18 are connected as follows: Figure 8 As shown; the tail rigging 17 consists of the first shackle 171, the first hand chain hoist 172, the second shackle 173, the sling 174, and the third shackle 175 from top to bottom.

[0038] The lifting sling 18 consists of the fourth shackle 181, the second hand chain hoist 182, the fifth shackle 183, and the first wire rope 184 from top to bottom. The tail-walking sling 17 is one set, and the lifting sling 18 consists of two sets. The selection of internal components such as shackles and wire ropes should be based on the actual situation to meet the turning requirements.

[0039] The first wire rope 184 is suspended by a sling on the lifting shaft 82, which helps to reduce the overall length of the lifting sling 18, ensuring that the turning can be completed and the tank erecting equipment 8 can be finally erected. In addition, it also helps to release the first wire rope 184 itself after the construction is completed.

[0040] S8. Loosen the bolt connection between the vertical tank transport saddle 81 and the vertical tank equipment 8 body. Simultaneously pull the first hand chain hoist 172 and the second hand chain hoist 182 in the tailing sling 17 and lifting sling 18 to lift the vertical tank equipment 8 to a certain height. Then remove the vertical tank transport saddle 81 and the roller trolley 5.

[0041] S9, such as Figure 9 As shown, the tailing sling 17 is released simultaneously, and the lifting sling 18 is pulled back to turn the tank over until the tank 8 is completely vertical.

[0042] S10, such as Figure 10 As shown, disconnect the tailing sling 17 from the tailing lifting point 83, and simultaneously loosen the lifting sling 18 to slowly lower the vertical tank equipment 8, but without contacting the upper surface of the vertical tank structure base 4.

[0043] S11. Using suitable tools such as rigging, make small-angle adjustments to the equipment along the tangent of the tank body of the vertical tank equipment 8. Simultaneously loosen and release the lifting rigging 18 to lower the vertical tank equipment 8 onto the vertical tank structure base 4.

[0044] When there is sufficient space above the vertical tank equipment 8, the angle adjustment does not need to select the sliding path as specified in S1. It can be selected according to the principles of convenient on-site construction, fewer pre-reserved rods, and less construction interference.

[0045] When there is sufficient space above the vertical tank equipment 8, the angle adjustment allows the vertical tank equipment 8 to be directly placed onto the vertical tank structure base 4 in step S10. After releasing the lifting sling 18, it can be... Figure 11 The appropriate intermediate suspension point 19 and rotating sling 20 shown enable equipment angle adjustment.

[0046] The intermediate lifting point 19 is welded below the structural beam or temporary beam 16 directly above the center of the vertical tank equipment 8. The connection between the intermediate lifting point 19 and the swivel rigging 20 is as follows: Figure 12 As shown, from top to bottom, they are: middle lifting point 19, universal hook 201, sixth shackle 202, third hand chain hoist 203, seventh shackle 204, and second wire rope 205.

[0047] Preferably, the universal hook 201 can rotate freely 306 degrees; there are two sets of swivel rigging 20 below the universal hook 201. The second wire rope 205 is fitted onto the lifting shaft 82, and the two sets of third hand-operated hoists 203 are pulled synchronously to lift the vertical tank equipment 8. After lifting, the nozzle orientation of the vertical tank equipment 8 is adjusted by using the universal hook 201. After the adjustment is completed, the third hand-operated hoists 203 are released synchronously to lower the vertical tank equipment 8 onto the vertical tank structure base 4.

[0048] S12. Install anchor bolts, retrieve tools and equipment, and complete the installation of vertical tank equipment 8.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method of erecting a tank on an FPSO topside module, characterised in that, The main steps include: S1. Plan the sliding path according to the position of the vertical tank equipment in the module, and clear the potential collision rods on the sliding path and when the vertical tank equipment is turned over in advance; when selecting the sliding path, try to ensure that after the vertical tank equipment is turned over inside the module, it does not need to rotate or only needs to rotate at a small angle to ensure that the tank nozzle is facing accurately, that is, the positioning is correct. S2. Arrange a side-loading platform with a certain load-bearing capacity on the designed sliding path, lay slide rails with sufficient strength, and place several roller trolleys with sufficient load-bearing capacity in the slide rails according to the size and distribution of the vertical tank transport saddle. S3. Select appropriate lifting slings and use a crawler crane to lift the vertical tank equipment to the side loading platform. The vertical tank transport saddle should fall precisely on the pre-arranged roller trolley. S4. Select appropriate towing slings, including hand chain hoists, slings, and shackles. Hook one end of the sling onto the vertical tank equipment and wrap the other end around the load-bearing column inside the module. By continuously shortening the length of the towing slings, the vertical tank equipment can be slid into the module. S5. Stop sliding when the line connecting the centers of the two lifting shafts of the vertical tank equipment is directly above the center line of the vertical tank structure base. S6. Weld the first lifting eye plate and the second lifting eye plate directly above the two lifting shafts of the vertical tank equipment, and weld the tail-running eye plate directly above the tail-running lifting point of the vertical tank equipment. S7. Select appropriate tail-running rigging and lifting rigging, and connect the tail-running eye plate and tail-running lifting point from top to bottom respectively, and connect the first lifting eye plate, the second lifting eye plate and the lifting shaft; S8. Loosen the bolt connection between the vertical tank transport saddle and the vertical tank equipment body; simultaneously pull the tail sling and the first and second hand chain hoists in the lifting sling, and simultaneously lift the vertical tank equipment to a certain height, then remove the vertical tank transport saddle and roller trolley. S9. Simultaneously loosen the tailing rigging, pull up the lifting rigging, and turn the tank over until the vertical tank equipment is completely vertical; S10. Disconnect the tailing sling from the tailing lifting point, simultaneously loosen the lifting sling, and slowly lower the vertical tank equipment, but without contacting the upper surface of the vertical tank structure base. S11. Use rigging to make small-angle adjustments to the equipment along the tangent of the tank body; simultaneously loosen and release the lifting rigging to lower the vertical tank equipment onto the vertical tank structure base; S12. Install anchor bolts, retrieve tools and equipment, and complete the installation of the vertical tank equipment.

2. The method for installing the vertical tank of the FPSO upper module according to claim 1, characterized in that, The slide rail is composed of upper channel steel and lower H-beam steel spot welded together. The two parallel rails are connected by channel steel for reinforcement. The length of the slide rail needs to ensure that the vertical tank equipment can slide from the side loading platform to the turning position, and the width depends on the size of the vertical tank transport saddle.

3. The method for installing the vertical tank of the FPSO upper module according to claim 1, characterized in that, The tail rigging consists of the first shackle, the first chain hoist, the second shackle, the sling, and the third shackle, from top to bottom.

4. The method for installing the vertical tank of the FPSO upper module according to claim 1, characterized in that, The lifting slings, from top to bottom, consist of the fourth shackle, the second hand chain hoist, the fifth shackle, and the first wire rope.

5. The method for installing the vertical tank of the FPSO upper module according to claim 1, characterized in that, When there is sufficient space above the vertical tank equipment for angle adjustment, it is not necessary to select the sliding path as specified in S1. The selection can be based on the principles of convenient on-site construction, minimal pre-reserved rods, and minimal construction interference.

6. The method for installing the vertical tank of the FPSO upper module according to claim 1, characterized in that, When there is enough space above the vertical tank equipment, the vertical tank equipment can be directly placed on the vertical tank structure base in S10; after the lifting slings are released, the equipment angle can be adjusted through the intermediate lifting point and the rotating slings.

7. The method for installing the vertical tank of the FPSO upper module according to claim 6, characterized in that, The intermediate lifting point is welded to the structural beam or temporary beam directly above the center of the vertical tank equipment.

8. The method for installing the vertical tank of the FPSO upper module according to claim 7, characterized in that, The connection between the intermediate lifting point and the swivel rigging, from top to bottom, is as follows: intermediate lifting point, universal hook, sixth shackle, third hand chain hoist, seventh shackle, and second wire rope.

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