Floating offshore structure

Abstract

A floating offshore structure of the present invention comprises: a hull; and a topside part disposed on the hull and receiving raw materials to produce a product. The hull includes: a storage part including a storage tank for storing the product produced by the topside part; a bow part disposed in front of the storage part; and a stern part disposed behind the storage part. A plurality of storage tanks are disposed in the width direction of the hull, a center cable trunk is formed on the upper portion between storage tanks adjacent to each other in the width direction in the storage part, a first side cable trunk and a second side cable trunk are formed on the upper portion of one side and the upper portion of the other side of the storage part in the width direction, respectively, and each of the center cable trunk, the first side cable trunk, and the second side cable trunk may be connected to the bow part and the stern part and a cable may be disposed thereon. According to the present invention, even if the plurality of storage tanks are disposed in the width direction of the hull, a space in which the cable is disposed is sufficiently secured, so that the connection by the cable between the equipment of the stern part of the hull, the equipment of the bow part of the hull, the equipment of the storage part of the hull, or the equipment of the topside part can be efficient and easy to maintain.

Description

Floating offshore structures

[0001] The present invention relates to a floating offshore structure.

[0002] Floating offshore structures float on the sea and produce products by receiving raw materials from land or the seabed. These floating offshore structures include FLNG (Floating Liquefied Natural Gas), which liquefies natural gas (NG) to produce, store, and offload LNG (Liquefied Natural Gas), and FPSO (Floating Production, Storage and Offloading), which processes well fluid to produce, store, and offload crude oil.

[0003] A floating offshore structure includes a hull that floats on the sea and stores products, a topside section that includes production equipment placed on the hull and receives raw materials to produce products, and a deck house placed on the hull that provides a space for an operator to control and monitor the floating offshore structure.

[0004] The hull includes a storage section comprising a storage tank for storing products produced in the topside section, a bow section positioned in front of the storage section, and a stern section positioned behind the storage section.

[0005] Utility equipment, such as generators and compressors, is installed in the hull to produce utilities like electricity and compressed air necessary for the production of products in the topside section. This utility equipment is located in the engine rooms included in the stern and bow sections of the hull, respectively. Additionally, electrical supply and distribution equipment, such as switchboards, is installed in the hull to supply and distribute electricity produced by the generators to other utility equipment or production equipment. Furthermore, instrumentation equipment is installed in the hull to connect the controllers, located in the control room within the deckhouse, to the utility and production equipment, enabling the controllers to monitor and control them. These electrical supply and distribution equipment and instrumentation equipment are installed in the electrical and instrumentation rooms located in the stern section of the hull.

[0006] Meanwhile, unloading equipment is installed in the storage tank for the unloading of products, and the unloading equipment includes an unloading pump connected to the storage tank. Additionally, multiple unloading pumps are connected to the storage tank for redundancy.

[0007] The electrical supply and distribution equipment and instrumentation equipment located in the electrical and instrumentation room at the stern of the hull are connected via cables to the utility equipment located at the bow or the production equipment at the topside. Additionally, the electrical supply and distribution equipment in the electrical and instrumentation room is connected to the cargo handling pumps via power supply cables.

[0008] Conventional floating offshore structures did not provide sufficient space for cable placement, resulting in complex cable connections between equipment at the stern, bow, storage, or topside, making maintenance difficult.

[0009] In other words, conventional floating offshore structures were not provided with a dedicated space for arranging cables that connect electrical distribution and supply equipment or instrumentation equipment to production equipment.

[0010] Meanwhile, in the event of an emergency, such as an accident like a fire or explosion, it is necessary to secure an escape route that allows workers to quickly and safely evacuate from the inside of the hull to the outside.

[0011] Multiple storage tanks included in the storage section of the hull may be arranged in the storage section in the width direction and length direction of the hull, respectively, and a lengthwise coffer dam is formed between adjacent storage tanks in the width direction.

[0012] In conventional floating offshore structures, a duct keel is formed below the longitudinal coffer dam in the height direction of the hull. Additionally, the longitudinal coffer dam and the duct keel are configured so as not to be connected to each other, and glycol lines, etc. are placed in the longitudinal coffer dam, while pipes, etc. are placed in the duct keel. Since the longitudinal coffer dam and the duct keel are not connected, workers move from the upper deck of the hull to the longitudinal coffer dam or the duct keel through separate passages to maintain glycol lines, etc. or pipes, etc.

[0013] Meanwhile, when a worker moved to the longitudinal coffer dam, they used a portable air circulator to circulate the air inside the longitudinal coffer dam before entering it. However, separate air circulation equipment was installed in the duct keel.

[0014] As such, in conventional floating offshore structures, the longitudinal coffer dam and the duct keel are not connected, so it was cumbersome for workers to move to the longitudinal coffer dam or the duct keel through separate passages. In addition, construction costs increased because a separate passage to the duct keel had to be formed and air circulation equipment had to be placed in the duct keel.

[0015] The problem that the present invention aims to solve is to provide a floating offshore structure in which, even if multiple storage tanks are arranged in the width direction of the hull, sufficient space is secured for cable placement, thereby enabling efficient cable connection between equipment in the stern of the hull, equipment in the bow of the hull, equipment in the storage section of the hull, or equipment in the topside section, and facilitating maintenance.

[0016] In addition, the problem that the present invention aims to solve is to provide a floating offshore structure equipped with a cable trunk that can be utilized as an escape route for a worker to escape from inside the hull to the outside in an emergency, wherein a cable is arranged to connect equipment placed in the bow, stern, or deck house of the hull with equipment included in the topside section.

[0017] In addition, the problem that the present invention aims to solve is to provide a floating offshore structure that facilitates the movement and maintenance of workers and reduces construction costs by extending the longitudinal coffer dam to the bottom plate of the hull and integrating the duct keel into the longitudinal coffer dam.

[0018] The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0019] One aspect of the floating offshore structure of the present invention for achieving the above objective comprises a hull; and a topside portion disposed on the hull and receiving raw materials to produce a product. The hull comprises a storage portion including a storage tank for storing the product produced in the topside portion, a bow portion disposed in front of the storage portion, and a stern portion disposed in rear of the storage portion. A plurality of the storage tanks are disposed in the width direction of the hull, and a center cable trunk is formed above the storage tanks adjacent to each other in the width direction of the storage portion. A first side cable trunk and a second side cable trunk are formed respectively on the upper portion of one side and the other side in the width direction of the storage portion, and each of the center cable trunk, the first side cable trunk, and the second side cable trunk is connected to the bow portion and the stern portion, and a cable may be disposed therein.

[0020] Another aspect of the floating marine structure of the present invention for achieving the above objective comprises a hull; and a topside portion disposed on the hull and receiving raw materials to produce a product, wherein the hull comprises a storage portion including a storage tank for storing the product produced in the topside portion, a bow portion disposed in front of the storage portion, and a stern portion disposed in rear of the storage portion, wherein the storage portion further comprises an outer portion including an upper deck and a plurality of outer plates forming an outer and inner space of the storage portion together with the upper deck, and an inner portion forming a space in which the storage tank is disposed, comprising a plurality of inner plates disposed in the inner space such that at least a portion thereof is spaced apart from the outer portion by a predetermined distance, and wherein a portion thereof may form a cable trunk connected to at least one of the bow portion and the stern portion and in which a cable is disposed.

[0021] Another aspect of the floating offshore structure of the present invention for achieving the above objective comprises: a hull; and a topside portion disposed on the hull and receiving raw materials to produce a product, wherein the hull comprises a storage portion including a storage tank for storing the product produced in the topside portion, wherein the storage portion further comprises an outer portion including an upper deck and a plurality of outer plates forming an outer and inner space of the storage portion together with the upper deck, and an inner portion forming a space in which the storage tank is disposed, comprising a plurality of inner plates disposed in the inner space such that at least a portion thereof is spaced apart from the outer portion by a predetermined distance, wherein the storage tank and the inner portion are disposed in a plurality in the width direction of the hull, and at least a portion of the inner plates facing each other of the inner portions adjacent to each other in the width direction form a longitudinal coffer dam, and the longitudinal coffer dam may extend to a bottom plate included in the outer plate in the height direction of the hull.

[0022] Specific details of other embodiments are included in the detailed description and drawings.

[0023] The floating offshore structure according to the present invention can ensure sufficient space for cables to be arranged even when multiple storage tanks are arranged in the width direction of the hull, thereby enabling efficient connection by cables between equipment in the stern of the hull, equipment in the bow of the hull, equipment in the storage section of the hull, or equipment in the topside section, and facilitating maintenance.

[0024] In addition, the floating offshore structure according to the present invention may be equipped with a cable trunk that can be utilized as an escape route for a worker to escape from inside the hull to the outside in an emergency, wherein a cable is arranged to connect equipment placed in the bow, stern, or deck house of the hull with equipment included in the topside.

[0025] In addition, the floating offshore structure according to the present invention can facilitate movement and maintenance of workers and reduce construction costs by extending the longitudinal coffer dam to the bottom plate of the hull and integrating the duct keel into the longitudinal coffer dam.

[0026] The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0027] FIG. 1 is a side view of a floating offshore structure according to some embodiments of the present invention.

[0028] Figure 2 is a plan view of the storage section of the floating offshore structure of Figure 1.

[0029] Figure 3 is a cross-sectional view along the line I-I' of Figure 2.

[0030] FIG. 4 is a drawing showing a cable rack placed in at least one of the first side cable trunk, the second side cable trunk, and the center cable trunk of the floating offshore structure of FIG. 1.

[0031] FIG. 5 is a plan view of the storage section of the floating offshore structure of FIG. 1, showing the connection of power supply cables and unloading pumps.

[0032] Figure 6 is a cross-sectional view along the line II-II' of Figure 5.

[0033] FIG. 7 is a side view of a floating offshore structure according to some embodiments of the present invention.

[0034] Figure 8 is a plan view of the storage section of the floating offshore structure of Figure 7.

[0035] Figure 9 is a cross-sectional view of the storage section of the floating offshore structure of Figure 7.

[0036] Figure 10 is a longitudinal section of the storage section of the floating offshore structure of Figure 7.

[0037] Fig. 11 is a cross-sectional view similar to Fig. 9 showing an escape path for a worker to escape from inside the hull to outside the hull in an emergency on the floating offshore structure of Fig. 7.

[0038] Fig. 12 is a longitudinal section view similar to Fig. 10, showing an escape path for a worker to escape from inside the hull to outside the hull in an emergency on the floating offshore structure of Fig. 7.

[0039] FIG. 13 is a side view of a floating offshore structure according to some embodiments of the present invention.

[0040] Fig. 14 is a cross-sectional view of the storage section of the floating offshore structure of Fig. 13.

[0041] FIG. 15 is a longitudinal section of the storage section of the floating offshore structure of FIG. 13.

[0042] FIG. 16 is a cross-sectional view of a storage section of a floating offshore structure according to some embodiments of the present invention.

[0043] FIG. 17 is a longitudinal section of the storage section of the floating offshore structure of FIG. 16.

[0044] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0045] FIG. 1 is a side view of a floating offshore structure according to some embodiments of the present invention.

[0046] Referring to FIG. 1, a floating marine structure (10) according to an embodiment of the present invention can produce a product by receiving raw materials from land or the seabed while floating on the sea.

[0047] For example, the floating offshore structure (10) may be a Floating Liquefied Natural Gas (FLNG) that produces, stores, and offloads LNG by receiving natural gas (NG) from a gas well on land or the seabed while floating on the sea. Additionally, the floating offshore structure (10) may be a Floating Production, Storage, and Offloading (FPSO) that produces, stores, and offloads crude oil by receiving and processing well fluid from an oil well on land or the seabed while floating on the sea. However, the floating offshore structure (10) is not limited to this.

[0048] A floating marine structure (10) according to an embodiment of the present invention includes a hull (100), a topside section (200), and a deck house (300), etc.

[0049] The hull (100) can float on the sea. The hull (100) may include an empty space inside to allow it to float on the sea. This space of the hull (100) may be designed to maintain the buoyancy of the hull (100) and to respond to external forces or changes in the marine environment. The hull (100) includes a storage section (110), a bow section (120), and a stern section (130), etc.

[0050] FIG. 2 is a plan view of the storage section of the floating offshore structure of FIG. 1, and FIG. 3 is a cross-sectional view along line I-I' of FIG. 2.

[0051] Referring to FIGS. 1 to 3, the storage section (110) can store products such as LNG or crude oil produced in the topside section (200). For the storage of products, the storage section (110) may include a storage tank (111). Multiple storage tanks (111) may be arranged in the storage section (110) in the width direction of the hull (100) (hereinafter referred to as the "width direction") and the length direction of the hull (100) (hereinafter referred to as the "length direction"), respectively.

[0052] For example, two storage tanks (111) may be arranged in the width direction and four in the length direction in the storage section (110). However, the number of storage tanks (111) and the configuration in which the storage tanks (111) are arranged in the storage section (110) are not limited thereto.

[0053] The storage tank (111) may be a membrane-type tank or a stand-alone tank. However, the storage tank (111) is not limited to this.

[0054] The widthwise cross-section of the storage tank (111) may be polygonal. For example, the widthwise cross-section of the storage tank (111) may be octagonal. However, the widthwise cross-section of the storage tank (111) is not limited to this.

[0055] For the placement and support of the storage tank (111), the storage section (110) may further include an outer section (112) and an inner section (113).

[0056] The outer part (112) can form an outer and inner space of the storage part (110). The outer part (112) includes an upper deck (UD) and an outer plate (OP), etc.

[0057] The upper deck (UD) can form the outer and inner space of the storage section (110) together with the outer plate (OP). The upper deck (UD) can form the upper part of the outer and inner space of the storage section (110). The upper deck (UD) can extend to the bow section (120) and the stern section (130).

[0058] A portion of the upper deck (UD) can form a center cable trunk (CC). A center cable trunk forming member (MC) can be connected to a portion of the upper deck (UD) to form a center cable trunk (CC). The cross-section in the width direction of the cable trunk forming member (MC) can have an approximate 'U' shape. Furthermore, by connecting this cable trunk forming member (MC) to a portion of the upper deck (UD), a center cable trunk (CC) can be formed. Additionally, production equipment not shown, which will be described later and is included in the topside portion (200) placed on the upper deck (UD), is positioned to correspond to the cable trunk forming member (MC), thereby allowing the cable trunk forming member (MC) to support the production equipment.

[0059] The widthwise cross-section of the center cable trunk (CC) may have a polygonal shape. For example, the widthwise cross-section of the center cable trunk (CC) may have a trapezoidal shape. However, the widthwise cross-section of the center cable trunk (CC) is not limited to this.

[0060] The outer plate (OP) can form the outer and inner space of the storage section (110) together with the upper deck (UD). The outer plate (OP) can form the side and bottom of the outer and inner space of the storage section (110). There may be multiple outer plates (OP). Multiple outer plates (OP) may include side plates (SP) and bottom plates (LP).

[0061] There are two side plates (SP), and the tops of the two side plates (SP) can be connected to each side of the upper deck (UD) in the width direction. Additionally, the bottom plate (LP) can be connected to each bottom of the two side plates (SP) whose tops are connected to each side of the upper deck (UD).

[0062] The inner portion (113) may form a space in which a storage tank (111) is disposed in the internal space of the storage portion (110). The inner portion (113) may include a plurality of inner plates (IP) disposed in the internal space of the storage portion (110) such that at least a portion thereof is spaced apart from the outer portion (112) by a predetermined distance.

[0063] The inner portion (113) may have a width direction cross-section corresponding to the width direction cross-section of the storage tank (111). For example, the storage tank (111) may have an octagonal width direction cross-section, and the inner portion (113) may have an octagonal width direction cross-section corresponding to this. Accordingly, the inner portion (113) may include eight inner plates (IP). However, the width direction cross-section of the inner portion (113) and the number of inner plates (IP) are not limited thereto.

[0064] The inner portion (113) may be placed in the storage portion (110) to correspond to the placement of the storage tank (111) in the storage portion (110). When multiple storage tanks (111) are placed in the storage portion (110) in the width direction and length direction, multiple inner portions (113) may be placed in the storage portion (110) in the width direction and length direction, respectively, to correspond to this. For example, two inner portions (113) may be placed in the width direction and four in the length direction in the storage portion (110). However, the number of inner portions (113) and the configuration in which the inner portions (113) are placed in the storage portion (110) are not limited thereto.

[0065] Meanwhile, a center cable trunk (CC) may be formed on the upper portion between adjacent storage tanks (111) in the width direction of the storage section (110). If two storage tanks (111) are arranged in the width direction of the hull (100), a center cable trunk (CC) may be formed on the upper portion of the center of the storage section (110) in the width direction. For example, as described above, a center cable trunk forming member (MC) may be connected to a part of the upper deck (UD) to form a center cable trunk (CC). If two storage tanks (111) are arranged in the width direction of the hull (100), a center cable trunk forming member (MC) may be connected to the center of the upper deck (UD) to form a center cable trunk (CC). However, the configuration in which the center cable trunk (CC) is formed is not limited to this.

[0066] In addition, a first side cable trunk (CS1) and a second side cable trunk (CS2) may be formed respectively on the upper side of one side and the upper side of the other side in the width direction of the storage unit (110).

[0067] For example, a partition plate (PP) may be connected to one side of the upper deck (UD) in the width direction and to an inner plate (IP) facing the upper deck (UD). Additionally, a partition plate (PP) may be connected to a side plate (SP) on one side in the width direction and to an inner plate (IP) facing the side plate (SP). Furthermore, a first side cable trunk (CS1) may be formed on the upper side of one side in the width direction of the storage section (110) by the upper deck (UD), side plate (SP), inner plate (IP), and partition plate (PP). Additionally, a partition plate (PP) may be connected to the other side of the upper deck (UD) in the width direction and to an inner plate (IP) facing the upper deck (UD). Additionally, a partition plate (PP) may be connected to a side plate (SP) on the other side in the width direction and to an inner plate (IP) facing the side plate (SP). And, on the upper side of the other side in the width direction of the storage section (110), a second side cable trunk (CS2) can be formed by an upper deck (UD), a side plate (SP), an inner plate (IP), and a partition plate (PP).

[0068] However, the configuration in which the first side cable trunk (CS1) and the second side cable trunk (CS2) are formed is not limited to this.

[0069] The widthwise cross-section of each of the first side cable trunk (CS1) and the second side cable trunk (CS2) may have a polygonal shape. For example, the widthwise cross-section of each of the first side cable trunk (CS1) and the second side cable trunk (CS2) may have a rectangular shape. However, the widthwise cross-section of each of the first side cable trunk (CS1) and the second side cable trunk (CS2) is not limited to this.

[0070] Each of the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2) can be connected to the bow (120) and the stern (130). Each of the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2) can be extended longitudinally and connected to the bow (120) and the stern (130). A cable (CB) can be installed in each of the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2).

[0071] With this configuration, the equipment of the stern section (130), the equipment of the bow section (120), the equipment of the storage section (110), or the equipment of the topside section (200) can be connected to each other by cables (CB) placed in the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2), respectively.

[0072] In addition, sufficient space can be secured for the cable (CB) to be placed through the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2), and the cable (CB) can be distributed.

[0073] Accordingly, the equipment of the stern section (130), the equipment of the bow section (120), the equipment of the storage section (110), or the equipment of the topside section (200) can be efficiently connected by a cable (CB).

[0074] For example, electrical distribution and supply equipment, such as a switchboard (not shown) to be described later and located in the stern section (130), or instrument equipment, etc., may be connected to utility equipment (not shown) located in the bow section (120) via a cable (CB) located in the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2). Additionally, electrical distribution and supply equipment or instrument equipment of the stern section (130) may be connected to production equipment (not shown) to be described later included in the topside section (200) via a cable (CB) located in the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2). And, electrical distribution and supply equipment or instrumentation equipment of the stern section (130) can be connected to the unloading pumps (PU1, PU2, PU3, PU4) described later, which are connected to the storage tank (111) of the storage section (110), through a cable (CB) placed in the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2).

[0075] For the placement of the cable (CB), a cable rack (CR) supporting the cable (CB) may be placed in at least one of the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2).

[0076] The cable rack (CR) may be positioned spaced apart from the center of at least one of the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2) in the width direction, either to the other side. By doing so, a space is secured where a passageway is available for a worker to move through, while the cable rack (CR) is positioned in at least one of the center cable trunk (CC), the first side cable trunk (CS1), and the second side cable trunk (CS2). Additionally, the worker can easily maintain the cables (CB), etc., during or after the construction of the floating offshore structure (10).

[0077] At least a portion of the cable rack (CR) may be formed from a galvanic material. Accordingly, the cable rack (CR) can be grounded to the hull (100) without the need to separately ground the cable rack (CR) to the hull (100) using a grounding wire not shown. Furthermore, the process of grounding the cable rack (CR) to the hull (100) is omitted, thereby improving constructability and reducing costs.

[0078] FIG. 4 is a drawing showing a cable rack placed in at least one of the first side cable trunk, the second side cable trunk, and the center cable trunk of the floating offshore structure of FIG. 1.

[0079] Referring to FIG. 4, the cable rack (CR) includes a support column member (MS), a cable tray (CT), a scaffolding member (SF), and an equipment support member (ME), etc.

[0080] The support column member (MS) may be extended in the height direction. There may be multiple support column members (MS). Additionally, multiple support column members (MS) may be spaced apart from each other in the width direction and the length direction. In the width direction, two support column members (MS) may be spaced apart from each other. However, the number of support column members (MS) spaced apart from each other in the width direction and the length direction, respectively, is not limited to this.

[0081] An upper connecting member (MT) connected to the upper part of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2) may be connected to the upper part of the support column member (MS).

[0082] A side connecting member (MM), with one end connected to the side of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2), may be connected between the top and bottom of the support column member (MS). The side connecting member (MM) may have an overall 'L' shape. However, the overall shape of the side connecting member (MM) is not limited to this. The side connecting member (MM) may be connected to each of the support column members (MS) that are spaced apart from each other in the width direction. There may be multiple side connecting members (MM). Additionally, multiple side connecting members (MM) may be spaced apart from each other in the length direction.

[0083] A lower connecting member (ML) connected to the lower part of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2) may be connected to the lower part of the support column member (MS). The lower connecting member (ML) may be adjustable in length.

[0084] When constructing a floating offshore structure (10), an upper connecting member (MT) and a side connecting member (MM) may first be connected to the upper and side of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2) by welding or the like, depending on the direction of an unillustrated block including the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2). Then, in a subsequent construction stage of the floating offshore structure (10), a lower connecting member (ML) may be connected to the lower part of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2). In this case, the length of the lower connecting member (ML) may be adjusted so that the lower connecting member (ML) comes into contact with the lower part of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2).

[0085] A cable tray (CT) can support a cable (CB). In other words, a cable (CB) can be placed in the cable tray (CT). The cable tray (CT) can be connected to a support column member (MS) so as to extend in the longitudinal direction. There may be multiple cable trays (CT). Additionally, multiple cable trays (CT) can be connected to at least some of the multiple support column members (MS) so as to be spaced apart from each other in the height direction. With this configuration, cables (CB) can be efficiently placed and management and maintenance of cables (CB) can be facilitated by classifying cables (CB) by signal, for example, and placing them in each cable tray (CT).

[0086] Meanwhile, in addition to the aforementioned multiple cable trays (CT) extending in the longitudinal direction, another cable tray (CT) extending in the height direction may be included. Furthermore, the cable tray (CT) extending in the height direction may be connected to at least a portion of the multiple cable trays (CT) extending in the longitudinal direction. Through the cable tray (CT) extending in the height direction, a cable (CB) placed in any one of the multiple cable trays (CT) extending in the longitudinal direction may be connected to equipment, etc., of the topside section (200) which can be placed on the upper deck (UD). Additionally, through the cable tray (CT) extending in the height direction, the cable (CB) may be arranged to move between the multiple cable trays (CT) extending in the longitudinal direction.

[0087] The scaffolding member (SF) may be connected to the other side of the side connecting member (MM). In other words, the scaffolding member (SF) may be connected to the side opposite to the side of the side connecting member (MM) that is connected to the side of the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2). For example, the scaffolding member (SF) may be connected to the other side of the side connecting member (MM) by means of a bolt, etc. However, the configuration in which the scaffolding member (SF) is connected to the other side of the side connecting member (MM) is not limited thereto. Meanwhile, the scaffolding member (SF) may be connected to the support column member (MS). The scaffolding member (SF) may have an overall 'L' shape. However, the overall shape of the scaffolding member (SF) is not limited thereto. The scaffolding member (SF) may be an angle member. However, the scaffolding member (SF) is not limited thereto.

[0088] There may be multiple scaffolding members (SF). Multiple scaffolding members (SF) may be spaced apart from each other in the longitudinal direction. Additionally, scaffolding platforms not shown may be placed on the multiple scaffolding members (SF). Furthermore, when there are multiple cable trays (CT), a worker can climb onto the scaffolding platforms using a ladder not shown to access cables (CB) placed on cable trays (CT) at relatively high positions. Accordingly, the worker can easily maintain the cables (CB) during or after the construction of the floating offshore structure (10).

[0089] The device support member (ME) can support electrical equipment (EE), such as lighting (LT), speakers (SK), or junction boxes (JB). The device support member (ME) can be connected to at least one of a cable tray (CT) and a support column member (MS). Meanwhile, if the electrical equipment (EE) requires separate grounding, it can be grounded to the configuration of a cable rack (CR) formed of a galvanic material using a grounding wire, etc.

[0090] In this way, by including a cable rack (CR) with a device support member (ME) that supports electrical equipment (EE), such as lighting (LT), speakers (SK), or junction boxes (JB), the electrical equipment (EE) does not need to be installed separately in the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2), thereby improving the constructability of the electrical equipment (EE) and making maintenance of the electrical equipment (EE) easier.

[0091] FIG. 5 is a plan view of the storage section of the floating offshore structure of FIG. 1, showing the connection of power supply cables and unloading pumps, and FIG. 6 is a cross-sectional view along the line II-II' of FIG. 5.

[0092] Referring to FIGS. 5 and 6, each storage tank (111) may be equipped with an unloading facility (FL) for unloading the product of the storage tank (111). Additionally, each unloading facility (FL) may include a plurality of unloading pumps (PU1, PU2, PU3, PU4) connected to the storage tank (111). For example, each unloading facility (FL) may include at least two unloading pumps (PU1, PU2, PU3, PU4) for redundancy.

[0093] When two storage tanks (111) are arranged in the width direction in the storage section (110), a plurality of unloading pumps (PU1, PU2, PU3, PU4) may be connected to each of the storage tank (111) on one side in the width direction and the storage tank (111) on the other side in the width direction.

[0094] In addition, the cable (CB) may include a plurality of power supply cables (CB1, CB2, CB3, CB4) that supply power to a plurality of unloading pumps (PU1, PU2, PU3, PU4).

[0095] And, some of the multiple power supply cables (CB1, CB2, CB3, CB4) can be connected to some of the multiple unloading pumps (PU1, PU2, PU3, PU4) through the first side cable trunk (CS1).

[0096] In addition, some of the multiple power supply cables (CB1, CB2, CB3, CB4) can be connected to other parts of the multiple unloading pumps (PU1, PU2, PU3, PU4) through the center cable trunk (CC).

[0097] And, another part of the multiple power supply cables (CB1, CB2, CB3, CB4) can be connected to another part of the multiple unloading pumps (PU1, PU2, PU3, PU4) through the second side cable trunk (CS2).

[0098] With this configuration, the power supply path can be duplicated while preventing the concentrated placement of power supply cables (CB1, CB2, CB3, CB4), thereby improving the reliability of power supply to the unloading pumps (PU1, PU2, PU3, PU4) and making maintenance easier.

[0099] For example, a plurality of unloading pumps (PU1, PU2, PU3, PU4) may include a first unloading pump (PU1), a second unloading pump (PU2), a third unloading pump (PU3), and a fourth unloading pump (PU4). Additionally, the first unloading pump (PU1) and the second unloading pump (PU2) may be connected to a storage tank (111) on one side in the width direction. Furthermore, the third unloading pump (PU3) and the fourth unloading pump (PU4) may be connected to a storage tank (111) on the other side in the width direction.

[0100] Additionally, the plurality of power supply cables (CB1, CB2, CB3, CB4) may include a first power supply cable (CB1), a second power supply cable (CB2), a third power supply cable (CB3), and a fourth power supply cable (CB4).

[0101] The first power supply cable (CB1) can be connected to the first unloading pump (PU1) through the first side cable trunk (CS1). The second power supply cable (CB2) can be connected to the second unloading pump (PU2) through the center cable trunk (CC). The third power supply cable (CB3) can be connected to the third unloading pump (PU3) through the center cable trunk (CC). The fourth power supply cable (CB4) can be connected to the fourth unloading pump (PU4) through the second side cable trunk (CS2).

[0102] However, the number of unloading pumps (PU1, PU2, PU3, PU4), the configuration in which the unloading pumps (PU1, PU2, PU3, PU4) are connected to the storage tank (111), the number of power supply cables (CB1, CB2, CB3, CB4), or the configuration in which the power supply cables (CB1, CB2, CB3, CB4) are connected to the unloading pumps (PU1, PU2, PU3, PU4) are not limited thereto.

[0103] Meanwhile, the aforementioned cable rack (CR) may be arranged to extend in the width direction between the first side cable trunk (CS1) and the unloading equipment (FL) located in the storage tank (111) on one side in the width direction so that the first power supply cable (CB1) is connected from the first side cable trunk (CS1) to the first unloading pump (PU1). Additionally, the aforementioned cable rack (CR) may be arranged to extend in the width direction between the center cable trunk (CC) and the unloading equipment (FL) located in the storage tank (111) on one side in the width direction so that the second power supply cable (CB2) is connected from the center cable trunk (CS1) to the second unloading pump (PU2). Furthermore, the aforementioned cable rack (CR) may be arranged to extend in the width direction between the center cable trunk (CC) and the unloading equipment (FL) located in the storage tank (111) on the other side in the width direction so that the third power supply cable (CB3) is connected from the center cable trunk (CS1) to the third unloading pump (PU3). Additionally, the aforementioned cable rack (CR) may be arranged to extend in the width direction between the second side cable trunk (CS2) and the unloading facility (FL) located in the storage tank (111) on the other side in the width direction so that the fourth power supply cable (CB4) is connected from the second side cable trunk (CS2) to the fourth unloading pump (PU4).

[0104] Referring again to FIGS. 1 and 2, the bow section (120) may be positioned in front of the storage section (110). The bow section (120) may be coupled to the storage section (110) so as to be positioned in front of the storage section (110). Mooring equipment not shown, such as a turret, may be placed in the bow section (120) to moor the floating offshore structure (10) in the sea. Additionally, the bow section (120) may include an unillustrated engine room. In the engine room of the bow section (120), unillustrated utility equipment, such as a generator or compressor, which produces utilities such as electricity or compressed air necessary for the production of products in the topside section (200), may be placed. Furthermore, a cable (CB) connected to the utility equipment placed in the engine room of the bow section (120) may be placed in the aforementioned center cable trunk (CC), first side cable trunk (CS1), or second side cable trunk (CS2) of the storage section (110).

[0105] The stern section (130) may be positioned at the rear of the storage section (110). The stern section (130) may be coupled to the storage section (110) so as to be positioned at the rear of the storage section (110). The stern section (130) may also include a machine room. Utility equipment may be placed in the machine room of the stern section (130). Additionally, the stern section (130) may include an electrical and instrumentation room, which is not illustrated. The electrical and instrumentation room of the stern section (130) may be placed in the machine room of the stern section (130) or outside the machine room. Electrical supply and distribution equipment, such as a switchboard that supplies and distributes electricity produced by a generator—which is utility equipment placed in the machine room of the stern section (130)—may be placed in the electrical and instrumentation room. Additionally, instrumentation equipment may be installed in the electrical and instrumentation room to enable a controller, which is placed in a control room (not shown below) included in the deck house (300), to monitor and control utility equipment or production equipment of the topside section (200). The instrumentation equipment may be connected to the controller and utility equipment or production equipment, etc. Cables (CB) connected to the electrical supply and distribution equipment or instrumentation equipment may be installed in the aforementioned center cable trunk (CC), first side cable trunk (CS1), or second side cable trunk (CS2) of the storage section (110). Furthermore, the electrical supply and distribution equipment or instrumentation equipment may be connected to the utility equipment of the bow section (120) or production equipment of the topside section (200) by cables (CB). Additionally, the electrical supply and distribution equipment or instrumentation equipment may be connected to the unloading pumps (PU1, PU2, PU3, PU4) of the storage section (110) by cables (CB). As described above, the electrical supply and distribution equipment can be connected to the unloading pumps (PU1, PU2, PU3, PU4) by power supply cables (CB1, CB2, CB3, CB4).

[0106] Meanwhile, the hull (100) may include an unillustrated unloading facility for unloading products such as LNG or crude oil stored in a storage tank (111) of a storage section (110) onto a transport vessel that transports them.

[0107] In addition, the hull (100) may be equipped with a propeller, such as a pod thruster, which is not shown, and may move on the sea.

[0108] The topside section (200) may be positioned on the hull (100). The topside section (200) may be connected to a raw material supply source, such as a gas well or oil well on land or the seabed, via a raw material supply pipe not shown, to receive raw materials such as natural gas or oil well fluid. Additionally, the topside section (200) may be connected to the machine room of the hull (100) to receive utilities such as electricity and produce products such as LNG or crude oil.

[0109] The topside section (200) may include various production equipment for producing products. For example, when LNG is produced in the topside section (200), the topside section (200) may include equipment for pre-treating natural gas (not shown), equipment for removing impurities or adjusting the composition of natural gas, and equipment for liquefying natural gas. Additionally, when crude oil is produced in the topside section (200), the topside section (200) may include equipment for separating crude oil, gas, and water, etc., from well fluid (not shown), equipment for processing and compressing gas, equipment for processing produced water, and equipment for stabilizing crude oil. However, the production equipment included in the topside section (200) for producing products is not limited thereto. In addition to production equipment, utility equipment, etc., may be installed in the topside section (200). A cable (CB) connected to production equipment or utility equipment included in the topside section (200) is placed in the center cable trunk (CC), the first side cable trunk (CS1), or the second side cable trunk (CS2) of the storage section (110), and can be connected to electrical distribution and supply equipment or instrumentation equipment, etc. of the stern section (130).

[0110] The topside section (200) is connected to the storage section (110) of the hull (100) and can store products such as produced LNG or crude oil in the storage section (110).

[0111] The deck house (300) can provide a space for a worker to control and monitor the floating offshore structure (10). To this end, the deck house (300) may include a control room. A controller that the worker can interface with may be placed in the control room.

[0112] The deck house (300) may provide a living space for workers. To this end, the deck house (300) may include a living area not shown. The deck house (300) may be placed on the hull (100). For example, the deck house (300) may be placed on the stern (130) of the hull (100). However, the placement location of the deck house (300) on the hull (100) is not particularly limited, such as the deck house (300) being placed on the bow (120) of the hull (100). The deck house (300) may receive electricity, etc., from the machine room of the hull (100).

[0113] FIG. 7 is a side view of a floating offshore structure according to some embodiments of the present invention.

[0114] Referring to FIG. 7, a floating marine structure (10) according to an embodiment of the present invention includes a hull (100), a topside section (200), and a deck house (300), etc.

[0115] The hull (100) can float on the sea. The hull (100) may include an empty space inside to allow it to float on the sea. This space of the hull (100) may be designed to maintain the buoyancy of the hull (100) and to respond to external forces or changes in the marine environment. The hull (100) includes a storage section (110), a bow section (120), and a stern section (130), etc.

[0116] FIG. 8 is a plan view of the storage section of the floating offshore structure of FIG. 7, FIG. 9 is a cross-sectional view of the storage section of the floating offshore structure of FIG. 7, and FIG. 10 is a longitudinal section of the storage section of the floating offshore structure of FIG. 7.

[0117] Referring to FIGS. 7 to 10, the storage unit (110) can store products such as LNG or crude oil produced in the topside unit (200). For the storage of products, the storage unit (110) may include a storage tank (111). Multiple storage tanks (111) may be arranged in the storage unit (110) in the width direction and the length direction, respectively.

[0118] For example, the floating offshore structure (10) can float in the sea where the significant wave height is 2m or more and 10m or less. Also, two storage tanks (111) can be arranged in the width direction and three in the length direction in the storage section (110). With this configuration, when the floating offshore structure (10) floats in the sea where the significant wave height is 2m or more and 10m or less, the construction cost of the storage section (110) can be reduced while minimizing sloshing of products in the storage tanks (111). In this case, when two storage tanks (111) are arranged in the width direction and three in the length direction in the storage section (110), the width (B) of the storage tank (111) can be 10m or more and 30m or less, the height (H) can be 20m or more and 30m or less, and the length (L) can be 50m or more and 60m or less. If the width (B) of the storage tank (111) is greater than 30m, the height (H) is greater than 30m, or the length (L) is greater than 60m, a strong sloshing load may occur. Additionally, if the width (B) of the storage tank (111) is less than 10m, the height (H) is less than 20m, or the length (L) is less than 50m, it may be difficult to place two storage tanks (111) in the width direction and three in the length direction in the storage section (110).

[0119] However, the number of storage tanks (111) and the configuration in which the storage tanks (111) are placed in the storage section (110) are not limited to this.

[0120] The storage tank (111) may be a membrane-type tank or a stand-alone tank. However, the storage tank (111) is not limited to this.

[0121] The widthwise cross-section of the storage tank (111) may be polygonal. For example, the widthwise cross-section of the storage tank (111) may be octagonal. However, the widthwise cross-section of the storage tank (111) is not limited to this.

[0122] For the placement and support of the storage tank (111), the storage section (110) may further include an outer section (112) and an inner section (113).

[0123] The outer part (112) can form an outer and inner space of the storage part (110). The outer part (112) includes an upper deck (UD) and an outer plate (OP), etc.

[0124] The upper deck (UD) can form the outer and inner space of the storage section (110) together with the outer plate (OP). The upper deck (UD) can form the upper part of the outer and inner space of the storage section (110). The upper deck (UD) can extend to the bow section (120) and the stern section (130).

[0125] Meanwhile, a portion of the upper deck (UD) may form a cable trunk (CT) connected to at least one of the bow (120) and the stern (130). A cable trunk forming member (MC) may be connected to a portion of the upper deck (UD) to form a cable trunk (CT). The cross-section in the width direction of the cable trunk forming member (MC) may have an approximate 'U' shape. Furthermore, a cable trunk (CT) may be formed by connecting such a cable trunk forming member (MC) to a portion of the upper deck (UD). Additionally, production equipment not shown, which will be described later and is included in the topside portion (200) placed on the upper deck (UD), may be positioned to correspond to the cable trunk forming member (MC), thereby allowing the cable trunk forming member (MC) to support the production equipment.

[0126] Cables (CB) connected to production equipment in the topside section (200) and electrical distribution and supply equipment, such as switchboards, or instrument equipment, which are not shown and are placed in the bow section (120), stern section (130), or deck house (300), may be placed in the cable trunk (CT). In this way, since cables (CB) are placed in the cable trunk (CT), sufficient dedicated space for wiring cables (CB) can be secured.

[0127] The widthwise cross-section of the cable trunk (CT) may have a polygonal shape. For example, the widthwise cross-section of the cable trunk (CT) may have a trapezoidal shape. However, the widthwise cross-section of the cable trunk (CT) is not limited to this.

[0128] As described below, the inner portion (113) may be arranged in the width direction in correspondence with the storage tank (111) which is arranged in the width direction in a plurality of ways and may include a plurality of inner plates (IP). Additionally, a longitudinal copper dam (CD1) may be formed by at least a portion of the inner plates (IP) facing each other among the inner plates (IP) included in each of the inner portions (113) that are adjacent to each other in the width direction. And, the cable trunk (CT) may be arranged to face the longitudinal copper dam (CD1) in the height direction.

[0129] A manhole (MH) that can be opened and closed by a manhole cover (CM) may be formed in the cable trunk (CT). A manhole (MH) may be formed in the cable trunk forming member (MC). When the manhole (MH) is opened, an escape path passing through the cable trunk (CT) may be formed between the longitudinal coffer dam (CD1) and the outside above the upper deck (UD), as described below. Accordingly, the cable trunk (CT) can be utilized as an escape path for a worker to escape from inside the hull (100) to the outside in case of an emergency such as a fire or explosion. Meanwhile, the manhole cover (CM) may be equipped with a sealing member not shown, etc., so that the inside of the cable trunk (CT) is sealed when the manhole (MH) is closed.

[0130] A partition plate (PP) may be arranged so as to be spaced apart from the cable trunk (CT) by a predetermined distance on each side in the width direction and on the upper deck (UD) and the inner plate (IP) facing the upper deck (UD). Additionally, the partition plate (PP) may be connected to the inner plates (IP) facing each other that form the longitudinal coffer dam (CD1) in the height direction to close the top of the longitudinal coffer dam (CD1). By doing so, a sealed space (SS) surrounding the cable trunk (CT) may be formed, and the cable trunk (CT) may become a safe zone protected from fire, explosion, etc.

[0131] The outer plate (OP) can form the outer and inner space of the storage section (110) together with the upper deck (UD). The outer plate (OP) can form the side and bottom of the outer and inner space of the storage section (110). There may be multiple outer plates (OP). Multiple outer plates (OP) may include side plates (SP) and bottom plates (LP).

[0132] There are two side plates (SP), and the tops of the two side plates (SP) can be connected to each side of the upper deck (UD) in the width direction. Additionally, the bottom plate (LP) can be connected to each bottom of the two side plates (SP) whose tops are connected to each side of the upper deck (UD).

[0133] The inner portion (113) may form a space in which a storage tank (111) is disposed in the internal space of the storage portion (110). The inner portion (113) may include a plurality of inner plates (IP) disposed in the internal space of the storage portion (110) such that at least a portion thereof is spaced apart from the outer portion (112) by a predetermined distance.

[0134] The inner portion (113) may have a width direction cross-section corresponding to the width direction cross-section of the storage tank (111). For example, the storage tank (111) may have an octagonal width direction cross-section, and the inner portion (113) may have an octagonal width direction cross-section corresponding to this. Accordingly, the inner portion (113) may include eight inner plates (IP). However, the width direction cross-section of the inner portion (113) and the number of inner plates (IP) are not limited thereto.

[0135] The inner portion (113) may be placed in the storage portion (110) to correspond to the placement of the storage tank (111) in the storage portion (110). The inner portion (113) may be placed in the storage portion (110) in the width direction and length direction, respectively, to correspond to the case where the storage tank (111) is placed in the storage portion (110) in multiple width directions and length directions. For example, two inner portions (113) may be placed in the storage portion (110) in the width direction and three in the length direction. However, the number of inner portions (113) and the configuration in which the inner portions (113) are placed in the storage portion (110) are not limited thereto.

[0136] When multiple inner sections (113) are arranged in the width direction, at least a portion of the inner plates (IP) facing each other of the inner sections (113) adjacent to each other in the width direction may form a longitudinal copper dam (CD1). The upper end of the longitudinal copper dam (CD1) in the height direction may be closed by a partition plate (PP) connected to the inner plates (IP) facing each other as described above. Additionally, the lower end of the longitudinal copper dam (CD1) in the height direction may also be closed by a partition plate (PP) connected to the inner plates (IP) facing each other. Furthermore, a partition plate (PP) connected to the bottom plate (LP) of the outer plate (OP) and the inner plate (IP) facing the bottom plate (LP) may be arranged at a predetermined distance from the longitudinal copper dam (CD1) in the width direction, respectively. Additionally, a duct keel (DK) can be formed by a partition plate (PP) that closes the bottom of the longitudinal coffer dam (CD1), a part of the bottom plate (LP), and a partition plate (PP) connected to the bottom plate (LP) and the inner plate (IP). Furthermore, although not illustrated, the longitudinal coffer dam (CD1) can be extended to the duct keel (DK) without a partition plate (PP) that closes the bottom of the longitudinal coffer dam (CD1), so that the longitudinal coffer dam (CD1) and the duct keel (DK) can be integrated into one. Also, an opening not illustrated can be formed in the partition plate (PP) separating the longitudinal coffer dam (CD1) and the duct keel (DK), so that the longitudinal coffer dam (CD1) and the duct keel (DK) can always be in communication.

[0137] The longitudinal copper dam (CD1) can be divided into multiple longitudinal sections by multiple partition plates (PP) corresponding to the number of storage tanks (111) arranged in the longitudinal direction. For example, if three storage tanks (111) are arranged in the longitudinal direction, the longitudinal copper dam (CD1) can be divided into three longitudinal sections by two partition plates (PP).

[0138] Meanwhile, the front and rear of the inner section (113) can each be closed by a partition plate (PP). Also, a width-direction coffer dam (CD2) can be formed between adjacent storage tanks (111) in the longitudinal direction by the partition plate (PP) closing the front of the inner section (113) and the partition plate (PP) closing the rear. Additionally, a width-direction coffer dam (CD2) can be formed between the bow section (120) and the storage tank (111) and between the storage tank (111) and the stern section (130) in the longitudinal direction.

[0139] The bow section (120) may be positioned in front of the storage section (110). The bow section (120) may be coupled to the storage section (110) so as to be positioned in front of the storage section (110). Mooring equipment not shown, such as a turret, may be placed in the bow section (120) to moor the floating offshore structure (10) in the sea. Additionally, the bow section (120) may include an unillustrated machine room. In the machine room of the bow section (120), utility equipment not shown, such as a generator or compressor, which produces utilities such as electricity or compressed air necessary for the production of products in the topside section (200), or electrical distribution and supply equipment such as a switchboard that supplies electricity to the utility equipment or the production equipment of the topside section (200), may be placed. Additionally, instrumentation equipment, etc., may be installed in the machine room of the bow section (120), connected to an unillustrated controller and utility equipment placed in a control room (not illustrated) to be described later, which is included in the deck house (300), so that the controller monitors and controls the utility equipment. Furthermore, a cable (CB) connected to electrical distribution and supply equipment or instrumentation equipment, etc., installed in the machine room of the bow section (120), may be installed in the aforementioned cable trunk (CT) of the storage section (110) and connected to production equipment of the topside section (200) or a controller of the deck house (300).

[0140] The stern section (130) may be positioned at the rear of the storage section (110). The stern section (130) may be coupled to the storage section (110) so as to be positioned at the rear of the storage section (110). The stern section (130) may also include a machine room. Utility equipment, electrical distribution and supply equipment, or instrumentation equipment may be placed in the machine room of the stern section (130). Additionally, a cable (CB) connected to the electrical distribution and supply equipment or instrumentation equipment placed in the machine room of the stern section (130) may be placed in the aforementioned cable trunk (CT) of the storage section (110) and connected to the production equipment of the topside section (200).

[0141] Meanwhile, the hull (100) may include an unillustrated unloading facility for unloading products such as LNG or crude oil stored in a storage tank (111) of a storage section (110) onto a transport vessel that transports them.

[0142] In addition, the hull (100) may be equipped with a propeller, such as a pod thruster, which is not shown, and may move on the sea.

[0143] The topside section (200) may be positioned on the hull (100). The topside section (200) may be connected to a raw material supply source, such as a gas well or oil well on land or the seabed, via a raw material supply pipe not shown, to receive raw materials such as natural gas or oil well fluid. Additionally, the topside section (200) may be connected to the machine room of the hull (100) to receive utilities such as electricity and produce products such as LNG or crude oil.

[0144] The topside section (200) may include various production equipment for producing products. For example, when LNG is produced in the topside section (200), the topside section (200) may include equipment for pre-treating natural gas (not shown), equipment for removing impurities or adjusting the composition of natural gas, and equipment for liquefying natural gas. Additionally, when crude oil is produced in the topside section (200), the topside section (200) may include equipment for separating crude oil, gas, and water, etc., from well fluid (not shown), equipment for processing and compressing gas, equipment for processing produced water, and equipment for stabilizing crude oil. However, the production equipment included in the topside section (200) for producing products is not limited thereto. In addition to production equipment, utility equipment, etc., may be installed in the topside section (200). A cable (CB) connected to production equipment or utility equipment included in the topside section (200) may be placed in the aforementioned cable trunk (CT) of the storage section (110) and connected to electrical distribution and supply equipment or instrumentation equipment of the bow section (120) or stern section (130), or connected to instrumentation equipment placed in an instrumentation room not shown later in the deck house (300).

[0145] The topside section (200) is connected to the storage section (110) of the hull (100) and can store products such as produced LNG or crude oil in the storage section (110).

[0146] The deck house (300) may provide a space for a worker to control and monitor the floating offshore structure (10). To this end, the deck house (300) may include a control room. A controller that the worker can interface with may be placed in the control room. The deck house (300) may include an instrumentation room where instrumentation equipment connected to the controller is placed. A cable (CB) connected to the instrumentation equipment of the deck house (300) may be placed in the aforementioned cable trunk (CT) and connected to utility equipment of the bow section (120), utility equipment of the stern section (130), or utility equipment of the topside section (200).

[0147] The deck house (300) can provide a living space for workers. To this end, the deck house (300) may include an unillustrated living area. The deck house (300) may be placed on the hull (100). The deck house (300) may be placed at the stern (130) of the hull (100). The deck house (300) may receive electricity, etc., from the machine room of the hull (100).

[0148] FIG. 11 is a cross-sectional view similar to FIG. 9 showing an escape path for a worker to escape from inside the hull to outside the hull in an emergency on the floating offshore structure of FIG. 7, and FIG. 12 is a longitudinal section similar to FIG. 10 showing an escape path for a worker to escape from inside the hull to outside the hull in an emergency on the floating offshore structure of FIG. 7.

[0149] Referring to FIGS. 11 and 12, a worker can perform tasks such as maintaining an unillustrated glycol line, etc., located in the longitudinal copper dam (CD1) of the storage unit (110). To do this, the worker can move to the cable trunk (CT) through an entrance (IO) that is openable and connects to the cable trunk (CT) and has an unillustrated door located on the upper deck (UD). An unillustrated ladder, etc., is placed between the entrance (IO) and the cable trunk (CT), so that the worker can move to the cable trunk (CT) using the ladder, etc. Then, the worker can open the manhole (MH) through the manhole cover (CM) of the cable trunk (CT) and move to the sealed space (SS) through the manhole (MH). A ladder, etc., is placed between the manhole (MH) and the sealed space (SS), so that the worker can move to the sealed space (SS) using the ladder, etc. A manhole that can be opened and closed by a manhole cover, although not shown, may be placed in the partition plate (PP) that closes the top of the longitudinal coffer dam (CD1). A worker can move to the longitudinal coffer dam (CD1) through the manhole placed in the partition plate (PP) that closes the top of the longitudinal coffer dam (CD1). A ladder or similar device may be placed in the longitudinal coffer dam (CD1), and a worker can move to the longitudinal coffer dam (CD1) using the ladder or similar device. Additionally, maintenance work can be performed on the longitudinal coffer dam (CD1).

[0150] In the event of an emergency such as a fire or explosion, a worker can move from the longitudinal coffer dam (CD1) where they were working to a sealed space (SS) through a closable manhole placed in a partition plate (PP) that closes the top of the longitudinal coffer dam (CD1). Additionally, from the sealed space (SS), they can move to a cable trunk (CT) by opening a manhole (MH) with a manhole cover (CM). Then, they can move outside the hull (100) through an entrance (IO) on the upper deck (UD).

[0151] Meanwhile, a manhole or similar structure that can be opened and closed with a manhole cover may be installed on the upper deck (UD) directly above the manhole (MH) of the cable trunk (CT). In addition, in an emergency, injured persons, etc., can be transported using a winch or similar device through the manhole or similar structure installed on the upper deck (UD) directly above the manhole (MH) of the cable trunk (CT) that can be opened and closed with a manhole cover.

[0152] Meanwhile, at the front and rear ends of the duct keel (DK) along the length, an unillustrated duct keel passageway connected from the upper deck (UD) may be connected. And, a worker can move between the upper deck (UD) and the duct keel (DK) through the duct keel passageway. In addition, as previously described, if the longitudinal coffer dam (D1) and the duct keel (DK) are integrated into one, there is no need to form a separate duct keel passageway. And, a worker can move from the upper deck (UD) to the longitudinal coffer dam (D1) through the cable trunk (CT) and the enclosed space (SS), or move from the longitudinal coffer dam (D1) to the upper deck (UD) through the enclosed space (SS) and the cable trunk (CT).

[0153] FIG. 13 is a side view of a floating offshore structure according to some embodiments of the present invention.

[0154] Referring to FIG. 13, a floating marine structure (10) according to an embodiment of the present invention includes a hull (100), a topside section (200), and a deck house (300), etc.

[0155] The hull (100) can float on the sea. The hull (100) may include an empty space inside to allow it to float on the sea. This space of the hull (100) may be designed to maintain the buoyancy of the hull (100) and to respond to external forces or changes in the marine environment. The hull (100) includes a storage section (110), a bow section (120), and a stern section (130), etc.

[0156] FIG. 14 is a cross-sectional view of the storage section of the floating offshore structure of FIG. 13, and FIG. 15 is a longitudinal section of the storage section of the floating offshore structure of FIG. 13.

[0157] Referring to FIGS. 13 to 15, the storage unit (110) can store products such as LNG or crude oil produced in the topside unit (200). For the storage of products, the storage unit (110) may include storage tanks (111). Multiple storage tanks (111) may be arranged in the storage unit (110) in the width direction and length direction, respectively.

[0158] However, the number of storage tanks (111) and the configuration in which the storage tanks (111) are placed in the storage section (110) are not limited to this.

[0159] The storage tank (111) may be a membrane-type tank or a stand-alone tank. However, the storage tank (111) is not limited to this.

[0160] The widthwise cross-section of the storage tank (111) may be polygonal. For example, the widthwise cross-section of the storage tank (111) may be octagonal. However, the widthwise cross-section of the storage tank (111) is not limited to this.

[0161] For the placement and support of the storage tank (111), the storage section (110) may further include an outer section (112) and an inner section (113).

[0162] The outer part (112) can form an outer and inner space of the storage part (110). The outer part (112) includes an upper deck (UD) and an outer plate (OP), etc.

[0163] The upper deck (UD) can form the outer and inner space of the storage section (110) together with the outer plate (OP). The upper deck (UD) can form the upper part of the outer and inner space of the storage section (110). The upper deck (UD) can extend to the bow section (120) and the stern section (130).

[0164] Meanwhile, a portion of the upper deck (UD) may form a cable trunk (CT) connected to at least one of the bow (120) and the stern (130). A cable trunk forming member (MC) may be connected to a portion of the upper deck (UD) to form a cable trunk (CT). The cross-section in the width direction of the cable trunk forming member (MC) may have an approximate 'U' shape. Furthermore, a cable trunk (CT) may be formed by connecting such a cable trunk forming member (MC) to a portion of the upper deck (UD). Additionally, production equipment not shown, which will be described later and is included in the topside portion (200) placed on the upper deck (UD), may be positioned to correspond to the cable trunk forming member (MC), thereby allowing the cable trunk forming member (MC) to support the production equipment.

[0165] Cables (CB) connected to production equipment in the topside section (200) and electrical distribution and supply equipment, such as switchboards, or instrument equipment, which are not shown and are placed in the bow section (120), stern section (130), or deck house (300), may be placed in the cable trunk (CT). In this way, since cables (CB) are placed in the cable trunk (CT), sufficient dedicated space for wiring cables (CB) can be secured.

[0166] The widthwise cross-section of the cable trunk (CT) may have a polygonal shape. For example, the widthwise cross-section of the cable trunk (CT) may have a trapezoidal shape. However, the widthwise cross-section of the cable trunk (CT) is not limited to this.

[0167] As described below, the inner portion (113) may be arranged in the width direction in correspondence with the storage tank (111) which is arranged in the width direction in a plurality of ways and may include a plurality of inner plates (IP). Additionally, a longitudinal copper dam (CD1) may be formed by at least a portion of the inner plates (IP) facing each other among the inner plates (IP) included in each of the inner portions (113) that are adjacent to each other in the width direction. And, the cable trunk (CT) may be arranged to face the longitudinal copper dam (CD1) in the height direction.

[0168] A manhole (MH) that can be opened and closed by a manhole cover (CM) may be formed in the cable trunk (CT). A manhole (MH) may be formed in the cable trunk forming member (MC). When the manhole (MH) is opened, an escape path passing through the cable trunk (CT) may be formed between the longitudinal coffer dam (CD1) and the outside above the upper deck (UD). Accordingly, the cable trunk (CT) can be utilized as an escape path for a worker to escape from inside the hull (100) to the outside in case of an emergency such as a fire or explosion. Meanwhile, the manhole cover (CM) may be equipped with a sealing member not shown, etc., so that the inside of the cable trunk (CT) is sealed when the manhole (MH) is closed.

[0169] A partition plate (PP) may be arranged so as to be spaced apart from the cable trunk (CT) by a predetermined distance on each side in the width direction and on the upper deck (UD) and the inner plate (IP) facing the upper deck (UD). Additionally, the partition plate (PP) may be connected to the inner plates (IP) facing each other that form the longitudinal coffer dam (CD1) in the height direction to close the top of the longitudinal coffer dam (CD1). By doing so, a sealed space (SS) surrounding the cable trunk (CT) may be formed, and the cable trunk (CT) may become a safe zone protected from fire, explosion, etc.

[0170] The outer plate (OP) can form the outer and inner space of the storage section (110) together with the upper deck (UD). The outer plate (OP) can form the side and bottom of the outer and inner space of the storage section (110). There may be multiple outer plates (OP). Multiple outer plates (OP) may include side plates (SP) and bottom plates (LP).

[0171] There are two side plates (SP), and the tops of the two side plates (SP) can be connected to each side of the upper deck (UD) in the width direction. Additionally, the bottom plate (LP) can be connected to each bottom of the two side plates (SP) whose tops are connected to each side of the upper deck (UD).

[0172] The inner portion (113) may form a space in which a storage tank (111) is disposed in the internal space of the storage portion (110). The inner portion (113) may include a plurality of inner plates (IP) disposed in the internal space of the storage portion (110) such that at least a portion thereof is spaced apart from the outer portion (112) by a predetermined distance.

[0173] The inner portion (113) may have a width direction cross-section corresponding to the width direction cross-section of the storage tank (111). For example, the storage tank (111) may have an octagonal width direction cross-section, and the inner portion (113) may have an octagonal width direction cross-section corresponding to this. Accordingly, the inner portion (113) may include eight inner plates (IP). However, the width direction cross-section of the inner portion (113) and the number of inner plates (IP) are not limited thereto.

[0174] The inner portion (113) may be placed in the storage portion (110) to correspond to the placement of the storage tank (111) in the storage portion (110). When multiple storage tanks (111) are placed in the storage portion (110) in the width direction and length direction, multiple inner portions (113) may be placed in the storage portion (110) in the width direction and length direction, respectively, to correspond to this. For example, two inner portions (113) may be placed in the width direction and three inner portions may be placed in the length direction in the storage portion (110). However, the number of inner portions (113) and the configuration in which the inner portions (113) are placed in the storage portion (110) are not limited thereto.

[0175] When multiple inner sections (113) are arranged in the width direction, at least a portion of the mutually facing inner plates (IP) of the inner sections (113) adjacent to each other in the width direction may form a longitudinal copper dam (CD1). The upper end of the longitudinal copper dam (CD1) in the height direction may be closed by a partition plate (PP) connected to the mutually facing inner plates (IP) as described above.

[0176] In the vertical direction, the longitudinal coffer dam (CD1) can be extended to the bottom plate (LP) of the outer plate (OP). In other words, the longitudinal coffer dam (CD1) and the part used as a duct keel in conventional floating offshore structures can be integrated. Additionally, the longitudinal coffer dam (CD1) can accommodate a glycol line (not shown) and piping (as placed in a conventional duct keel). Accordingly, a worker can move to the longitudinal coffer dam (CD1) to maintain the piping along with the glycol line, making movement and maintenance easier. Furthermore, since there is no need to form a separate passage connected to the duct keel and no need to place a separate air circulator, the construction cost of the floating offshore structure (10) can be reduced.

[0177] A partition plate (PP) connected to the bottom plate (LP) of the outer plate (OP) and the inner plate (IP) facing the bottom plate (LP) may be arranged at a predetermined distance from the longitudinal copper dam (CD1) on one side and the other side in the width direction, respectively. Additionally, the lower part of the longitudinal copper dam (CD1) may be formed by a part of the bottom plate (LP) and the partition plate (PP) connected to the bottom plate (LP) and the inner plate (IP).

[0178] The longitudinal copper dam (CD1) can be divided into multiple longitudinal sections by multiple partition plates (PP) corresponding to the number of storage tanks (111) arranged in the longitudinal direction. For example, if three storage tanks (111) are arranged in the longitudinal direction, the longitudinal copper dam (CD1) can be divided into three longitudinal sections by two partition plates (PP).

[0179] Meanwhile, the front and rear of the inner section (113) can each be closed by a partition plate (PP). Also, a width-direction coffer dam (CD2) can be formed between adjacent storage tanks (111) in the longitudinal direction by the partition plate (PP) closing the front of the inner section (113) and the partition plate (PP) closing the rear. Additionally, a width-direction coffer dam (CD2) can be formed between the bow section (120) and the storage tank (111) and between the storage tank (111) and the stern section (130) in the longitudinal direction.

[0180] A worker can perform maintenance work, such as maintaining glycol lines or piping, located in the longitudinal copper dam (CD1) of the storage section (110). To do this, the worker can move to the cable trunk (CT) through an entrance (IO) that is openable and connects to the cable trunk (CT) and has an unillustrated door located on the upper deck (UD). Between the entrance (IO) and the cable trunk (CT), an unillustrated ladder is placed so that the worker can move to the cable trunk (CT) using the ladder. Then, the worker can open the manhole (MH) through the manhole cover (CM) of the cable trunk (CT) and move to the sealed space (SS) through the manhole (MH). Between the manhole (MH) and the sealed space (SS), a ladder is placed so that the worker can move to the sealed space (SS) using the ladder. A manhole that can be opened and closed by a manhole cover, although not shown, may be placed in the partition plate (PP) that closes the top of the longitudinal coffer dam (CD1). A worker can move to the longitudinal coffer dam (CD1) through the manhole placed in the partition plate (PP) that closes the top of the longitudinal coffer dam (CD1). A ladder or similar device may be placed in the longitudinal coffer dam (CD1), and a worker can move to the longitudinal coffer dam (CD1) using the ladder or similar device. Additionally, maintenance work can be performed on the longitudinal coffer dam (CD1).

[0181] In the event of an emergency such as a fire or explosion, a worker can move from the longitudinal coffer dam (CD1) where they were working to a sealed space (SS) through a closable manhole placed in a partition plate (PP) that closes the top of the longitudinal coffer dam (CD1). Additionally, from the sealed space (SS), they can move to a cable trunk (CT) by opening a manhole (MH) with a manhole cover (CM). Then, they can move outside the hull (100) through an entrance (IO) on the upper deck (UD).

[0182] The bow section (120) may be positioned in front of the storage section (110). The bow section (120) may be coupled to the storage section (110) so as to be positioned in front of the storage section (110). Mooring equipment not shown, such as a turret, may be placed in the bow section (120) to moor the floating offshore structure (10) in the sea. Additionally, the bow section (120) may include an unillustrated machine room. In the machine room of the bow section (120), utility equipment not shown, such as a generator or compressor, which produces utilities such as electricity or compressed air necessary for the production of products in the topside section (200), or electrical distribution and supply equipment such as a switchboard that supplies electricity to the utility equipment or the production equipment of the topside section (200), may be placed. Additionally, instrumentation equipment, etc., may be installed in the machine room of the bow section (120), connected to an unillustrated controller and utility equipment placed in a control room (not illustrated) to be described later, which is included in the deck house (300), so that the controller monitors and controls the utility equipment. Furthermore, a cable (CB) connected to electrical distribution and supply equipment or instrumentation equipment, etc., installed in the machine room of the bow section (120), may be installed in the aforementioned cable trunk (CT) of the storage section (110) and connected to production equipment of the topside section (200) or a controller of the deck house (300).

[0183] The stern section (130) may be positioned at the rear of the storage section (110). The stern section (130) may be coupled to the storage section (110) so as to be positioned at the rear of the storage section (110). The stern section (130) may also include a machine room. Utility equipment, electrical distribution and supply equipment, or instrumentation equipment may be placed in the machine room of the stern section (130). Additionally, a cable (CB) connected to the electrical distribution and supply equipment or instrumentation equipment placed in the machine room of the stern section (130) may be placed in the aforementioned cable trunk (CT) of the storage section (110) and connected to the production equipment of the topside section (200).

[0184] Meanwhile, the hull (100) may include an unillustrated unloading facility for unloading products such as LNG or crude oil stored in a storage tank (111) of a storage section (110) onto a transport vessel that transports them.

[0185] In addition, the hull (100) may be equipped with a propeller, such as a pod thruster, which is not shown, and may move on the sea.

[0186] The topside section (200) may be positioned on the hull (100). The topside section (200) may be connected to a raw material supply source, such as a gas well or oil well on land or the seabed, via a raw material supply pipe not shown, to receive raw materials such as natural gas or oil well fluid. Additionally, the topside section (200) may be connected to the machine room of the hull (100) to receive utilities such as electricity and produce products such as LNG or crude oil.

[0187] The topside section (200) may include various production equipment for producing products. For example, when LNG is produced in the topside section (200), the topside section (200) may include equipment for pre-treating natural gas (not shown), equipment for removing impurities or adjusting the composition of natural gas, and equipment for liquefying natural gas. Additionally, when crude oil is produced in the topside section (200), the topside section (200) may include equipment for separating crude oil, gas, and water, etc., from well fluid (not shown), equipment for processing and compressing gas, equipment for processing produced water, and equipment for stabilizing crude oil. However, the production equipment included in the topside section (200) for producing products is not limited thereto. In addition to production equipment, utility equipment, etc., may be installed in the topside section (200). A cable (CB) connected to production equipment or utility equipment included in the topside section (200) may be placed in the aforementioned cable trunk (CT) of the storage section (110) and connected to electrical distribution and supply equipment or instrumentation equipment of the bow section (120) or stern section (130), or connected to instrumentation equipment placed in an instrumentation room not shown later in the deck house (300).

[0188] The topside section (200) is connected to the storage section (110) of the hull (100) and can store products such as produced LNG or crude oil in the storage section (110).

[0189] The deck house (300) may provide a space for a worker to control and monitor the floating offshore structure (10). To this end, the deck house (300) may include a control room. A controller that the worker can interface with may be placed in the control room. The deck house (300) may include an instrumentation room where instrumentation equipment connected to the controller is placed. A cable (CB) connected to the instrumentation equipment of the deck house (300) may be placed in the aforementioned cable trunk (CT) and connected to utility equipment of the bow section (120), utility equipment of the stern section (130), or utility equipment of the topside section (200).

[0190] The deck house (300) can provide a living space for workers. To this end, the deck house (300) may include an unillustrated living area. The deck house (300) may be placed on the hull (100). The deck house (300) may be placed at the stern (130) of the hull (100). The deck house (300) may receive electricity, etc., from the machine room of the hull (100).

[0191] FIG. 16 is a cross-sectional view of a storage section of a floating offshore structure according to some embodiment of the present invention, and FIG. 17 is a longitudinal section of the storage section of the floating offshore structure of FIG. 16.

[0192] Referring to FIGS. 16 and 17, a connecting plate (CP) may be arranged so as to be spaced at a predetermined height in the height direction from the bottom plate (LP) of the outer plate (OP) of the storage unit (110) and connected to an inner plate (IP) that forms a longitudinal copper dam (CD1). By doing so, the longitudinal copper dam (CD1) may be divided into a longitudinal copper dam (CD1) above the connecting plate (CP) and a longitudinal copper dam (CD1) below the connecting plate (CP).

[0193] An opening (HO) may be formed in the communication plate (CP). By doing so, the longitudinal coffer dam (CD1) above the communication plate (CP) and the longitudinal coffer dam (CD1) below the communication plate (CP), which are partitioned by the communication plate (CP), may be connected.

[0194] There may be multiple openings (HO). Additionally, multiple openings (HO) may be formed in the communication plate (CP) spaced apart from each other along the longitudinal direction of the hull (100).

[0195] The opening (HO) can be sized to allow a worker to pass through.

[0196] A floating offshore structure according to such an embodiment can ensure sufficient space for cables to be arranged even when multiple storage tanks are arranged in the width direction of the hull, thereby enabling efficient and easy maintenance of cable connections between equipment at the stern of the hull, equipment at the bow of the hull, equipment in the storage section of the hull, or equipment at the topside.

[0197] In addition, the floating offshore structure according to such an embodiment may be equipped with a cable trunk that can be utilized as an escape route for a worker to escape from inside the hull to the outside in an emergency, and which has a cable installed to connect equipment placed in the bow, stern, or deck house of the hull with equipment included in the topside.

[0198] In addition, the floating offshore structure according to this embodiment can facilitate movement and maintenance of workers and reduce construction costs by extending the longitudinal coffer dam to the bottom plate of the hull and integrating the duct keel into the longitudinal coffer dam.

[0199] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. Hull; and It includes a topside section positioned on the hull above, which receives raw materials and produces products, and The above hull is, A storage unit including a storage tank for storing products produced in the topside portion above, A front section positioned in front of the above storage section, and It includes a stern portion positioned at the rear of the above storage portion, Multiple storage tanks are arranged in the width direction of the hull, and A center cable trunk is formed on the upper portion between the storage tanks adjacent to each other in the width direction in the above storage section, and A first side cable trunk and a second side cable trunk are respectively formed on the upper part of one side and the upper part of the other side in the width direction of the storage unit, and A floating offshore structure in which the center cable trunk, the first side cable trunk, and the second side cable trunk are each connected to the bow and the stern and cables are arranged.

2. In Paragraph 1, Two storage tanks are arranged in the width direction of the hull, and A floating offshore structure in which the center cable trunk is formed at the upper part of the center of the storage section in the width direction.

3. In Paragraph 1, A floating offshore structure having a cable rack supporting the cable disposed in at least one of the center cable trunk, the first side cable trunk, and the second side cable trunk.

4. In Paragraph 3, The above cable rack is a floating offshore structure spaced apart from the center of at least one of the center cable trunk, the first side cable trunk, and the second side cable trunk to one side or the other in the width direction.

5. In Paragraph 3, The above cable rack is a floating offshore structure in which at least a portion is formed of a galvanic material.

6. In Paragraph 3, The above cable rack is A plurality of support column members extending in the height direction of the hull and spaced apart from each other in the width direction and the length direction of the hull, and A floating offshore structure comprising a cable tray connected to the support column member to extend in the above longitudinal direction and supporting the cable.

7. In Paragraph 6, The above cable trays are multiple, and A floating offshore structure in which a plurality of cable trays are connected to at least some of a plurality of support column members spaced apart from each other in the height direction.

8. In Paragraph 7, The above cable rack is A floating offshore structure further comprising a device support member connected to at least one of the cable tray and the support column member to support an electrical device.

9. In Paragraph 2, A plurality of unloading pumps are connected to each of the storage tank on one side in the width direction and the storage tank on the other side in the width direction, and The above cable includes a plurality of power supply cables that supply power to a plurality of the above unloading pumps, and Some of the plurality of power supply cables are connected to some of the plurality of unloading pumps through the first side cable trunk, and Another part of the multiple power supply cables is connected to another part of the multiple unloading pumps through the center cable trunk, and A floating offshore structure in which another part of the plurality of power supply cables is connected to another part of the plurality of unloading pumps through the second side cable trunk.

10. In Paragraph 9, The above-mentioned unloading pumps are, A first unloading pump and a second unloading pump connected to the storage tank on one side in the width direction, and It includes a third unloading pump and a fourth unloading pump connected to the storage tank on the other side in the width direction, The plurality of the above power supply cables, A first power supply cable connected to the first unloading pump through the first side cable trunk, A second power supply cable connected to the second unloading pump through the center cable trunk, A third power supply cable connected to the third unloading pump through the center cable trunk, and A floating offshore structure comprising a fourth power supply cable connected to the fourth unloading pump through the second side cable trunk.

11. Hull; and It includes a topside section positioned on the hull above, which receives raw materials and produces products, and The above hull is, A storage unit including a storage tank for storing products produced in the topside portion above, A front section positioned in front of the above storage section, and It includes a stern portion positioned at the rear of the above storage portion, The above storage unit is, An outer part comprising an upper deck and a plurality of outer plates forming the outer and inner spaces of the storage part together with the upper deck, and It further includes an inner portion forming a space in which the storage tank is disposed, comprising a plurality of inner plates, at least a portion of which is spaced apart from the outer portion by a predetermined distance from the inner portion. A floating offshore structure in which a portion of the upper deck is connected to at least one of the bow and stern and forms a cable trunk on which a cable is laid.

12. In Paragraph 11, A floating offshore structure in which a cable trunk forming member is connected to a part of the upper deck to form the cable trunk.

13. In Paragraph 11, A plurality of the storage tanks and the inner parts are arranged in the width direction of the hull, and A floating offshore structure in which at least a portion of the inner plates facing each other in the width direction adjacent to each other forms a longitudinal coffer dam.

14. In Paragraph 13, A floating offshore structure having two storage tanks and two inner parts arranged in the width direction.

15. In Paragraph 13, A floating offshore structure in which the cable trunk is positioned to face the longitudinal coffer dam and the height direction of the hull.

16. In Paragraph 15, A partition plate connected to the upper deck and the inner plate facing the upper deck is respectively arranged at a predetermined distance from the cable trunk on one side and the other side in the width direction, and A partition plate is arranged to close the top of the longitudinal coffer dam in the height direction of the hull, A floating offshore structure forming a sealed space surrounding the above cable trunk.

17. In Paragraph 16, A floating offshore structure in which a manhole is formed in the above cable trunk that can be opened and closed by a manhole cover.

18. In Paragraph 11, A floating offshore structure in which the cross-section in the width direction of the hull of the above cable trunk has a polygonal shape.

19. In Paragraph 13, A floating offshore structure in which a plurality of storage tanks and inner sections are arranged along the longitudinal direction of the hull.

20. In Paragraph 19, A floating offshore structure having three storage tanks and three inner sections arranged along the length direction.

21. In Paragraph 20, A floating offshore structure having a width of 10m or more and 30m or less, a height of 20m or more and 30m or less, and a length of 50m or more and 60m or less.

22. Hull; and It includes a topside section positioned on the hull above, which receives raw materials and produces products, and The above hull is, It includes a storage section comprising a storage tank for storing products produced in the topside section above, and The above storage unit is, An outer part comprising an upper deck and a plurality of outer plates forming the outer and inner spaces of the storage part together with the upper deck, and It further includes an inner portion forming a space in which the storage tank is disposed, comprising a plurality of inner plates, at least a portion of which is spaced apart from the outer portion by a predetermined distance from the inner portion. A plurality of the storage tanks and the inner parts are arranged in the width direction of the hull, and At least a portion of the inner plates facing each other in the width direction adjacent to each other in the width direction forms a longitudinal coffer dam, and The above-mentioned longitudinal coffer dam is a floating offshore structure extending in the height direction of the hull to a bottom plate included in the outer plate.

23. In Paragraph 22, A floating offshore structure having partition plates respectively arranged at a predetermined distance from the above-mentioned longitudinal coffer dam to one side and the other side in the width direction, connected to the bottom plate and the inner plate facing the bottom plate.

24. In Paragraph 22, A communication plate is arranged that is spaced apart by a predetermined height in the height direction of the hull from the bottom plate and is connected to each of the inner plates forming the longitudinal coffer dam, and A floating offshore structure having an opening formed in the above-mentioned communication plate to communicate with the longitudinal coffer dam above the communication plate and the longitudinal coffer dam below the communication plate.

25. In Paragraph 24, The above opening is multiple, and A floating offshore structure in which a plurality of the above-mentioned openings are formed in the above-mentioned connecting plate so as to be spaced apart from each other in the longitudinal direction of the above-mentioned hull.

26. In Paragraph 22, The above hull A front section positioned in front of the above storage section, and It further includes a stern portion positioned at the rear of the above storage portion, and A floating offshore structure in which a portion of the upper deck is connected to at least one of the bow and stern and forms a cable trunk on which a cable is laid.

27. In Paragraph 26, A floating offshore structure in which a cable trunk forming member is connected to a part of the upper deck to form the cable trunk.

28. In Paragraph 26, A floating offshore structure having two storage tanks and two inner parts arranged in the width direction.

29. In Paragraph 26, The above cable trunk is a floating offshore structure positioned to face the above longitudinal coffer dam and the above height direction.

30. In Paragraph 29, A partition plate connected to the upper deck and the inner plate facing the upper deck is respectively arranged at a predetermined distance from the cable trunk on one side and the other side in the width direction, and A partition plate is arranged to close the top of the longitudinal coffer dam in the above height direction, A floating offshore structure forming a sealed space surrounding the above cable trunk.

31. In Paragraph 30, A floating offshore structure in which a manhole is formed in the above cable trunk that can be opened and closed by a manhole cover.

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