An offshore oil hose recovery support vessel

Abstract

The utility model discloses an offshore oil hose recovery support ship, including a main hull, a traction system, a hose reeling system and a crude oil storage system; the traction system includes a towing winch, a stern drum and a shark clamp device; the hose reeling system includes a hose winch, a hose slinger and a plurality of drums; the crude oil storage system includes: an oil collecting pool, a discharge tank and an oil storage tank. The steel wire rope of the towing winch drags the oil hose onto the deck through the stern drum, and the shark clamp device clamps the steel wire rope; the hose winch continues to drag the oil hose, passes through the hose slinger and reels it on the drum; the hose winch rotates in the opposite direction, disassembles the oil hose, and pours out the crude oil in the oil hose. The offshore oil hose recovery support ship of the utility model is flexible and maneuverable when recovering and replacing the oil hose, and can recover and replace the oil hose quickly, safely and effectively. It has the function of storing the oil hose, which solves the problem that the oil hose is towed by a tugboat after the offshore platform changes its base.

Description

Technical Field

[0001] The utility model belongs to the technical field of ships, and in particular relates to an offshore oil hose recovery support ship. Background Art

[0002] The floating offshore oil hose is one of the most important accessories for offshore oil field development. It is used to transport the extracted crude oil to shuttle tankers or offshore receiving stations and other transshipment facilities. Before the crude oil is transported to the shuttle tanker, the oil hose needs to be towed to the crane hook position of the shuttle tanker. After the crude oil is transported from the oil platform, FPSO to the shuttle tanker, the auxiliary oil hose is towed back to the predetermined point and fixed with the mooring fixed cable or the auxiliary FPSO hose reel is used to recover the hose. These tasks require the assistance of the outer ship. Although the floating oil hose has sufficient pressure resistance and strong corrosion resistance, it also faces the problem of renewal after a certain period of use. More importantly, in the face of different sea conditions, the oil hose is damaged due to uneven load on the shuttle tanker and the sea surface or collision and interference with the platform. The oil hose needs to be replaced in time. The key is to flexibly recycle the old oil hose and replace it with a new one.

[0003] In the past, when the offshore platform changed its base, the oil hose was towed by tugboat. To tow the oil hose to the new base, it is necessary to apply to the Maritime Administration for sea towing operations, demarcate the safe towing operation area of ​​the floating oil hose, and other ships are not allowed to enter the towing area. At the same time, some shuttle tankers and offshore platforms do not have condensate recovery systems. Shuttle tankers and offshore platforms cannot receive the mixed oil and water generated by flushing the condensate in the hose, so an offshore oil hose recovery support ship is developed. Utility Model Content

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An offshore oil hose recovery support vessel, characterized in that it comprises a main hull, a traction system, a hose reeling system and a crude oil storage system;

[0006] The traction system comprises: a towing winch, which is arranged at a 1 / 3 length position of the main deck of the main hull; a stern roller, which is arranged at the stern of the main hull; and a shark clamp device, which is arranged at the stern of the main hull.

[0007] The hose reeling system comprises: a hose winch, a hose winch is respectively arranged on both sides of the front and rear of the main deck of the main hull; a hose reel is arranged at the tail of the hose winch; and a plurality of reels are arranged at the bow position;

[0008] The crude oil storage system comprises: an oil collecting pool, a groove structure is sunk at the stern of the ship, the groove structure serves as an oil collecting pool, the front and rear sealing plates of the groove are arc plates, the left and right sealing plates are inclined plates, and two discharge troughs are respectively arranged on the left and right sides of the oil collecting pool; an oil storage tank is located in the cabin;

[0009] The steel wire rope of the towing winch passes through the stern drum to drag the oil hose to the deck, and the shark clamp device clamps the steel wire rope; the hose winch continues to drag the oil hose, passes through the hose drainer and is rolled up on the drum; the hose winch rotates in the opposite direction to disassemble the oil hose and pour out the crude oil in the oil hose; the crude oil in the oil hose flows into the discharge tank, and the bottom of the oil collecting tank drains the crude oil in the oil collecting tank into the oil storage tank through a pipeline.

[0010] As a further solution of the utility model: the hose reeling system also includes: an electric winch, which is arranged at the stern of the ship; a marine crane, which is arranged on both sides of the oil collecting tank; the hose winch rotates in the opposite direction, and the electric winch cooperates with the hose winch to move the oil hose toward the stern, and the marine crane hoists the disassembled oil hose to the hose stacking area on the ship or hoists the hose to the area outside the ship.

[0011] As a further solution of the utility model: a flushing system is included, and the flushing system includes a flushing pump and a pressure pump arranged in the engine room. The flushing system is used to clean the oil delivery hose and is also used to flush the deck surface and the oil collecting tank.

[0012] As a further solution of the utility model: it comprises an inert gas system, and the inert gas system is used for flushing the oil delivery hose.

[0013] As a further solution of the utility model: it includes a detection sensor, which is arranged on the main deck of the main hull and is used to monitor the values ​​of hydrogen sulfide and hydrocarbons in the oil hose during the cleaning process; the alarm sound of the detection sensor covers the main deck area of ​​the ship.

[0014] As a further solution of the utility model: the hose stacking area is arranged on both sides of the stern side, for placing the oil delivery hose after disassembly and flushing, and the hose stacking area is composed of detachable fence piles.

[0015] As a further solution of the utility model: the towing winch and the hose winch are both hydraulically driven, the hydraulic power station is arranged in the engine room, and the bow is provided with a remote start and remote control operation.

[0016] As a further solution of the utility model: the main hull is made of low-carbon steel, the hull and deckhouse of the main hull are fully welded structures, and a longitudinal frame mode is adopted; the keel is connected to the center beam over the entire length, and the front end of the keel gradually becomes thinner and connected to the bow, and is connected to the left center line of the hull; the bow is made of steel plates with a straight rod, and thick steel bars are used, arranged along the waterline; except for the bow and stern which adopt a single bottom structure, the bottom of the ship is designed as a double bottom; the left and right engine beams are connected to the center beam and to the longitudinal bulkhead of the rear cabin; the frame of the main hull is welded to the hull plate with a spherical plate; the crossbeam of the superstructure deck is in the form of an angle steel.

[0017] As a further solution of the utility model: it also includes an electric power system, which is arranged in the engine room part of the main hull. The electric power system includes a diesel generator set and a diesel emergency generator set, which are used to provide power for the main hull.

[0018] As a further solution of the utility model: it also includes a propulsion system, the propulsion system is located at the bow of the main hull, the propulsion system includes a four-stroke medium-speed diesel engine, a speed change gear box and a Z-type propulsion device, and the propulsion system is centrally controlled by the driving console to form a DP2 dynamic positioning mode.

[0019] Beneficial effects of the utility model:

[0020] The offshore oil hose recovery support ship of the utility model is flexible and maneuverable when recovering and replacing the oil hose, and can recover and replace the oil hose quickly, safely and effectively.

[0021] The offshore oil hose recovery support vessel has the function of storing floating oil hoses, which solves the problem that the oil hoses are towed by tugboats after the offshore platform changes its base. When the oil hose is towed to the new base, it is necessary to apply to the Maritime Safety Administration for sea towing operations, and to define the safe towing operation area for the floating oil hose. Other ships are not allowed to enter the towing area. The offshore oil hose recovery support vessel of the utility model can store the floating oil hoses that need to be towed, and independently and efficiently complete the work task of the oil hose replacement base.

[0022] The offshore oil hose recovery support vessel is equipped with a crude oil storage system, which solves the problem that shuttle tankers and offshore platforms cannot receive the mixed oil and water produced by the condensate oil in the oil hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic front view of the structure of an offshore oil hose recovery support vessel.

[0024] Figure 2 This is a schematic diagram of the structure of an offshore oil hose recovery support vessel from an overhead view.

[0025] Figure 3This is a schematic diagram of the hose winch of the offshore oil hose recovery support vessel.

[0026] Figure 4 This is a schematic diagram of the hose stacking area of ​​the offshore oil hose recovery support vessel.

[0027] As shown in the figure: 1-main hull, 2-drag winch, 3-stern drum, 4-shark clamp device, 5-hose winch, 6-several drums, 7-oil collecting tank, 8-discharge tank, 9-oil storage tank, 10-offshore crane, 11-oil transfer hose, 12-hose stacking area. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. It should be understood that the present application is not limited to the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The technical terms involved in the embodiments of the present application are briefly explained below for ease of understanding.

[0033] The front of a ship is called the bow; the rear is called the stern; the steel plates arranged horizontally on the hull are called decks. The main deck divides the ship into two parts, the part above the main deck is collectively called the superstructure; the part below the main deck is called the main hull. The midpoint of the ship's length is called the midship. In the main hull, transverse bulkheads are used to divide it into many cabins of different sizes according to needs. These cabins are named according to their respective uses or locations.

[0034] like Figure 1-4 As shown, an offshore oil hose recovery support vessel includes a main hull 1, a traction system, a hose reeling system and a crude oil storage system.

[0035] like Figure 2 As shown, the traction system includes: a towing winch 2, which is arranged at the 1 / 3 length position of the main deck of the main hull 1; a stern roller 3, which is arranged at the stern of the main hull 1; and a shark clamp device 4, which is arranged at the stern of the main hull 1.

[0036] Specifically, the traction system is used to drag the oil hose 11 from the sea to the ship deck. The minimum static braking force, low gear dynamic braking force, and minimum dynamic tensioning force of the towing winch 2 are designed to be greater than the maximum towing force of the ship to ensure safety when towing the oil hose 11. To ensure smooth towing of the oil hose 11, a stern drum 3 is provided at the stern of the ship. Through the rotation of the stern drum 3, the cable oil hose 11 can rotate with it, thereby significantly reducing the friction resistance of sliding. This not only improves the operating efficiency, but also avoids serious wear of the rear deck caused by sliding friction. At the same time, to ensure safety during wire rope towing, the stern of the ship is equipped with two sets of shark clamp devices 4, which are used to clamp the towing wire rope and bear the load of the wire rope. The wire rope of the towing winch 2 is connected to the stern drum 3 after passing through the shark clamp.

[0037] like Figure 1-3 As shown, the hose reeling system includes: a hose winch 5, a hose winch 5 is respectively arranged on both sides of the front and rear of the main deck of the main hull 1; a hose reel is arranged at the tail of the hose winch 5; and a plurality of reels 6 are arranged at the bow position.

[0038] Specifically, the hose reeling system is used to reel and store the oil hose 11. The hose winch 5 can reel the oil hose 11 with a bending radius of 3m, a maximum diameter of 0.6m, and a length of up to 400m into a reel. In order to ensure the required static and dynamic reeling and braking capabilities, the hose winch 5 is designed to be able to reel in two layers of oil hose. In order to ensure that the two reels can smoothly meet the established reeling requirements, a set of hose slingers is provided at the rear of the winch. The hose slingers guide the oil hose 11 to be neatly and orderly arranged on the drum, ensuring that the oil hose 11 maintains appropriate tension and position during the reeling process.

[0039] Among them, the towing winch 2 and the hose winch 5 are both hydraulically driven, the hydraulic power station is arranged in the engine room, and the bow is set up with a remote start remote control operation. The hydraulic power station is equipped with a display panel on-site and at the remote control point to display the maximum working tension, dynamic tension, static braking force, dynamic braking force, oil temperature, oil pressure, limit alarm, drum rotation speed, storage hose length, pipe laying speed, etc., to ensure safety and reliability during operation.

[0040] like Figure 1 and 3 As shown, the crude oil storage system includes: an oil collecting pool 7, a groove structure is sunk at the stern of the ship, the groove structure serves as the oil collecting pool 7, the front and rear sealing plates of the groove are arc plates, the left and right sealing plates are inclined plates, and two discharge grooves 8 are respectively arranged on the left and right sides of the oil collecting pool 7; an oil storage tank 9 is located in the cabin.

[0041] Specifically, the oil collecting pool 7 is designed on the main deck, near the stern. The sunken design can save space on the main deck and ensure smooth traction of the oil hose 11. The front and rear sealing plates of the oil collecting pool 7 are designed as arc plates. The sealing plates on the left and right sides are designed as inclined plates. Two discharge troughs 8 are respectively arranged at the front and rear positions on the left and right sides of the collecting pool. The bottom of the discharge trough 8 drains the crude oil into the oil storage tank 9 through pipelines. In order to ensure the storage capacity of each oil storage tank 9, a remote-controlled electric control valve group and a liquid level alarm system are installed on the discharge pipeline respectively. At the same time, in order to ensure the isolation of large particles of crude oil impurities, the inclined sealing plates on the left and right sides are designed with holes and can be flipped for subsequent cleaning.

[0042] Recovering the oil hose 11 at sea: The steel wire rope of the towing winch 2 drags the oil hose 11 onto the deck through the stern drum 3, and the hose winch 5 continues to drag the oil hose 11 and reels it onto the drum through the hose reel.

[0043] Replace the oil delivery hose 11: The hose winch 5 is reversed, and the new oil delivery hose 11 on the reel is spread out and thrown into the sea.

[0044] Discharging the crude oil from the oil hose 11: The floating oil hose 11 is generally composed of flanged pipe sections with lengths of 12.2m and 10.7m, and the oil hose 11 contains crude oil. After the offshore oil hose is reeled into the drum by the large hose, if the oil hose in the drum needs to be removed, the hose winch 5 rotates in the opposite direction to remove the oil hose 11 and pour out the crude oil from the oil hose 11. The crude oil in the oil hose 11 flows into the discharge tank 8, and the bottom of the oil collecting tank 7 drains the crude oil from the oil collecting tank 7 into the oil storage tank 9 through a pipeline. The oil hose 11 that has been discharged of crude oil is rewound around the drum using the hose winch 5.

[0045] The offshore oil hose recovery support vessel is maneuverable and flexible when recovering and replacing the oil hose 11, and can recover and replace the oil hose quickly, safely and effectively.

[0046] The offshore oil hose recovery support vessel has the function of storing the oil hose 11, which solves the problem that the oil hose is towed by a tugboat after the offshore platform changes its base. When the oil hose 11 is towed to the new base, it is necessary to apply to the Maritime Safety Administration for sea area towing operations, and to define the towing safety operation area of ​​the floating oil hose 11. Other ships are not allowed to enter the towing area. The offshore oil hose recovery support vessel of the utility model can roll up the floating oil hose 11 that needs to be towed, and independently and efficiently complete the task of changing the base of the oil hose 11.

[0047] The offshore oil hose recovery support ship is equipped with a crude oil storage system, which solves the problem that shuttle tankers and offshore platforms cannot receive the mixed oil and water produced by the condensate oil in the oil hose 11.

[0048] Furthermore, if Figure 1-3 As shown, in order to facilitate the discharge of crude oil in the oil hose 11, the hose reeling system also includes: an electric winch, which is arranged at the stern of the ship; a marine crane 10, which is arranged on both sides of the oil collecting tank 7; the hose winch 5 rotates in the opposite direction, and the electric winch cooperates with the hose winch 5 to move the oil hose 11 toward the stern, and the marine crane 10 hoists the disassembled oil hose 11 to the hose stacking area 12 on the ship or hoists the hose to the area outside the ship.

[0049] Specifically, to cooperate with the hose winch 5, two electric winches are arranged at the stern of the ship. When the oil hose in the drum is removed, the hose winch 5 rotates in the opposite direction, the oil hose 11 is released from the drum, and the electric winch cooperates with the hose winch 5 to pull the oil hose 11 toward the stern. To ensure safety, a shark clamp is also arranged between the hose winch 5 and the electric winch to fix the wire rope and bear the load. The wire rope of the hose winch 5 is connected to the electric winch through the shark clamp. A marine crane 10 is arranged on both sides near the oil collecting tank 7. The marine crane 10 adopts a special hose hoist device, which can lift the disassembled oil hose 11 to the hose stacking area 12 on the ship or lift the hose to the area outside the ship.

[0050] Furthermore, the offshore oil hose recovery support vessel has the function of cleaning the oil hose 11. A flushing system is provided, the flushing system includes a flushing pump and a pressure pump provided in the engine room, and the flushing system is used to clean the oil hose 11 and also to flush the deck surface and the oil collecting tank 7.

[0051] Furthermore, in order to enhance the cleaning effect of the oil hose 11, a flushing function is added. An inert gas system is provided. The inert gas system is used to flush the oil hose 11. Specifically, in order to ensure that the crude oil inside the oil hose 11 can be completely discharged after disassembly, a nitrogen inert gas system is configured to flush the crude oil inside the oil hose 11, and the inert gas is used to ensure safety during the flushing process.

[0052] Furthermore, during the cleaning process of the crude oil in the oil hose 11, a monitoring device is added to prevent hydrogen sulfide and hydrocarbons from exceeding the specified values. The detection sensor is set on the main deck of the main hull 1 to monitor the values ​​of hydrogen sulfide and hydrocarbons in the oil hose 11 during the cleaning process; the alarm sound of the detection sensor covers the main deck area of ​​the ship to ensure that the deck crew can identify it in time. The sensor monitoring control panel is installed in the cab to monitor the operation in real time to ensure the safety of the operation.

[0053] Furthermore, if Figure 4 As shown, the cleaned oil hose 11 is wound around the reel again using the hose winch 5. In order to facilitate the placement of the oil hose 11 after disassembly and cleaning, a stacking area is set on both sides of the stern side. The hose stacking area 12 is set on both sides of the stern side for placing the oil hose 11 after disassembly and cleaning. The hose stacking area 12 is composed of detachable fence piles. When the ship is used to supply cargo, the detachable fence piles are removed to ensure that the deck area is maximized for placing the supply cargo.

[0054] In this embodiment, the offshore oil hose recovery support vessel of the utility model is also equipped with corresponding infrastructure to meet the operation of the vessel.

[0055] Specifically, the main hull 1 is made of low-carbon steel, and the hull and deckhouse of the main hull 1 are all welded structures, using a longitudinal frame mode; the keel is connected to the center beam over the entire length, and the front end of the keel tapers and connects to the bow and the left center line of the hull. The bow is made of steel plates with straight rods, thick steel bars, and arranged along the waterline; except for the bow and stern, which use a single bottom structure, the bottom of the ship is designed as a double bottom. In order to make the rear cabin structure continuous, the left and right engine beams are extended as much as possible together with the center beam and connected to the longitudinal bulkhead of the rear cabin. The frame of the main hull 1 adopts a spherical plate, which is welded to the hull plate, and a transverse ring frame or web is installed at the necessary position. The main deck beam or longitudinal beam adopts a spherical plate, combined with a solid beam assembled at the deck opening and other positions, and the beam of the superstructure deck is in the form of an angle steel.

[0056] Specifically, the power system is set in the engine room of the main hull 1. The power system includes 4 sets of diesel generator sets and 1 set of diesel emergency generator sets, which are used to provide power for the main hull 1. 690V, 3PH, 60Hz is used for the propulsion system, 440V, 3Ph, 60Hz is used for auxiliary power supply, and 230V, 1Ph, 60Hz is used for general lighting, emergency lighting, and navigation lighting. The whole ship is equipped with energy storage systems, power management systems, alarm systems, main engine remote control systems, etc. that meet the requirements of the specifications.

[0057] Specifically, the propulsion system is located at the bow of the main hull 1. The propulsion system includes two four-stroke medium-speed diesel engines, two speed change gear boxes and two Z-type propulsion devices. The propulsion system is centrally controlled by the bridge to form a DP2 dynamic positioning mode. It is equipped with a power pipeline system that meets international standards, a ship pipeline system, an anchoring mechanical system, an engine room automation system, etc.

[0058] Specifically, protection channels are set up on both sides of the ship. One is to protect the pipes and cable systems, and the other is to allow personnel to safely reach the observation or operation position through the protection channels when operating as deck equipment.

[0059] In addition, the offshore oil hose recovery support vessel, in addition to meeting the needs of oil hose 11 recovery, cleaning and replacement, also has the functions of towing and transporting fresh water, diesel, deck cargo, materials, equipment and external fire fighting, and can also serve as a supply ship.

[0060] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "including a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0061] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An offshore oil hose recovery support vessel, characterized in that: It includes the main hull, traction system, hose reeling system and crude oil storage system; The traction system comprises: a towing winch, which is arranged at a 1 / 3 length position of the main deck of the main hull; a stern roller, which is arranged at the stern of the main hull; and a shark clamp device, which is arranged at the stern of the main hull. The hose reeling system comprises: a hose winch, a hose winch is respectively arranged on both sides of the front and rear of the main deck of the main hull; a hose reel is arranged at the tail of the hose winch; and a plurality of reels are arranged at the bow position; The crude oil storage system comprises: an oil collecting pool, a groove structure is sunk at the stern of the ship, the groove structure serves as an oil collecting pool, the front and rear sealing plates of the groove are arc plates, the left and right sealing plates are inclined plates, and two discharge troughs are respectively arranged on the left and right sides of the oil collecting pool; an oil storage tank is located in the cabin; The steel wire rope of the towing winch passes through the stern drum to drag the oil hose to the deck, and the shark clamp device clamps the steel wire rope; the hose winch continues to drag the oil hose, passes through the hose drainer and is rolled up on the drum; the hose winch rotates in the opposite direction to disassemble the oil hose and pour out the crude oil in the oil hose; the crude oil in the oil hose flows into the discharge tank, and the bottom of the oil collecting tank drains the crude oil in the oil collecting tank into the oil storage tank through a pipeline.

2. The offshore oil hose recovery support vessel according to claim 1, characterized in that: The hose reeling system also includes: an electric winch, which is arranged at the stern of the ship; and a marine crane, which is arranged on both sides of the oil collecting tank. The hose winch rotates in the opposite direction, and the electric winch cooperates with the hose winch to move the oil hose toward the stern. The marine crane hoists the disassembled oil hose to the hose stacking area on the ship or hoists the hose to the area outside the ship.

3. The offshore oil hose recovery support vessel according to claim 1 or 2, characterized in that: It comprises a flushing system, which comprises a flushing pump and a pressure pump arranged in the engine room. The flushing system is used for cleaning the oil delivery hose and also for flushing the deck surface and the oil collecting tank.

4. The offshore oil hose recovery support vessel according to claim 3, characterized in that: An inert gas system is included, and the inert gas system is used for flushing the oil delivery hose.

5. The offshore oil hose recovery support vessel according to claim 4, characterized in that: It comprises a detection sensor, which is arranged on the main deck of the main hull and is used to monitor the values ​​of hydrogen sulfide and hydrocarbons in the oil hose during the cleaning process; the alarm sound of the detection sensor covers the main deck area of ​​the ship.

6. The offshore oil hose recovery support vessel according to claim 2, characterized in that: The hose stacking area is arranged on both sides of the stern side, and is used to place the oil delivery hose after disassembly and flushing. The hose stacking area is composed of detachable fence piles.

7. The offshore oil hose recovery support vessel according to claim 1, characterized in that: The towing winch and the hose winch are both hydraulically driven, the hydraulic power station is arranged in the engine room, and the bow is provided with a remote start and remote control operation.

8. The offshore oil hose recovery support vessel according to claim 1, characterized in that: The main hull is made of low-carbon steel, and the hull and deckhouse of the main hull are fully welded structures, adopting a longitudinal frame mode; the keel is connected to the center beam over the entire length, and the front end of the keel gradually tapers and is connected to the bow and the left center line of the hull; the bow is made of steel plates with a straight rod, thick steel bars, and arranged along the waterline; except for the bow and stern which use a single bottom structure, the bottom of the ship is designed as a double bottom; the left and right engine beams are connected to the center beam and to the longitudinal bulkhead of the rear cabin; the frame of the main hull is welded to the hull plate with a spherical plate; the crossbeam of the superstructure deck is in the form of an angle steel.

9. The offshore oil hose recovery support vessel according to claim 1, characterized in that: It also includes an electric power system, which is arranged in the engine room of the main hull. The electric power system includes a diesel generator set and a diesel emergency generator set, which are used to provide power for the main hull.

10. The offshore oil hose recovery support vessel according to claim 1, characterized in that: It also includes a propulsion system, which is located at the bow of the main hull. The propulsion system includes a four-stroke medium-speed diesel engine, a speed change gear box and a Z-type propulsion device. The propulsion system is centrally controlled by the driving console to form a DP2 dynamic positioning mode.

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