Offshore hose laying device and method

Abstract

The invention relates to the technical field of ocean engineering, in particular to a laying device and method for an offshore hose, and aims to solve the problems that a floating hose is low in installation efficiency and insufficient in reliability. The offshore hose laying device comprises a workboat, a launching track, an assembling support and a first traction winch, wherein the launching track, the assembling support and the first traction winch are installed on the workboat. The assembling support is used for assembling the hose strings, and the multiple hose strings are connected end to end to form the floating hose. The first traction winch is used for being connected with the end, away from the buoy, of the floating hose. The workboat moves in a direction away from the pontoon to move the floating hose along the launch track. A workboat is used as a moving platform and is matched with a buoy of a single-point mooring system, the offshore floating hose is assembled in a real-time assembling and dragging mode, the problems that in a land assembling mode, the occupied area is large, floating dragging can be conducted only when the sea condition is good, and the requirement for a wharf or a seaside site is high are solved, and the installation efficiency and reliability can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering technology, and in particular to a device and method for laying an offshore hose. Background Art

[0002] The single point mooring system is known as an offshore floating dock. One end of a floating hose floating on the sea surface is connected to the buoy of the single point mooring system, and the other end is connected to the tanker to carry out oil loading and unloading operations. The floating hose can be composed of a single hose, or two or more hoses. The more hoses there are, the more types of oil can be transported.

[0003] Traditional floating hose assembly is mostly carried out on land. After the entire hose is assembled, it is towed by a tugboat to a single-point mooring buoy for connection and installation. Floating hoses are generally hundreds of meters long. The assembly of the entire hose requires a large dock or other shore site with a suitable length and area. As a distribution center for ships and cargo, the dock is not only expensive to use, but also has limited space for construction. The coming and going of ships and the loading and unloading of cargo at the dock will directly affect the assembly progress. The hoisting and floating towing of the hose also have great safety risks.

[0004] At the same time, the floating hose's launching and floating towing operations at sea after being assembled on the shore are greatly affected by the shore topography and marine environmental conditions, and have high safety and technical requirements for the topography at the launching point, the water depth of the operating sea area, sea conditions, seabed obstacles, and tugboat draft. The sea areas where single-point mooring systems are built are usually shallow along the coast and have poor sea conditions. The floating hose is easily damaged during launching or floating towing, which requires shutdown and repair. Therefore, there are many uncontrollable factors in the installation of floating hoses using the floating towing method, and it is difficult to ensure installation efficiency and reliability. Summary of the invention

[0005] The object of the present invention is to provide a device and method for laying an offshore hose, so as to solve the problems of low installation efficiency and insufficient reliability of floating hoses.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] A laying device for an offshore hose comprises an operating vessel and a launching track, an assembly bracket and a first traction winch installed on the operating vessel; the assembly bracket is used for assembling a hose string, and a plurality of hose strings are connected end to end to form a floating hose; one end of the floating hose is connected to a buoy, and the first traction winch is used for connecting to an end of the floating hose away from the buoy; the operating vessel moves in a direction away from the buoy to make the floating hose move along the launching track.

[0008] Furthermore, the laying device of the offshore hose also includes a launching bridge, which is installed on the operating ship and located at the end of the launching track. The floating hose moves along the launching track and enters the water through the launching bridge.

[0009] Furthermore, the offshore hose laying device also includes a second traction winch, which is installed on the buoy; the first traction winch and the second traction winch are respectively connected to the two ends of the floating hose, and the second traction winch is used to pull the floating hose so that one end of the floating hose is connected to the buoy.

[0010] Furthermore, the offshore hose laying device also includes an auxiliary traction assembly, which is installed on the workboat and is used to be connected to an end of the floating hose away from the buoy.

[0011] Furthermore, the laying device of the offshore hose includes at least two assembly brackets, and the assembly brackets are arranged on both sides of the launching track.

[0012] Furthermore, the assembly bracket includes a frame body and a limiting rod, the frame body is installed on the work boat, and the limiting rod is connected to the frame body to limit the position of the hose string.

[0013] Furthermore, the limiting rod is inserted into the frame and is detachably connected to the frame.

[0014] Furthermore, the launching track includes supporting rollers, and a plurality of supporting rollers are arranged along the length direction of the launching track.

[0015] Furthermore, the auxiliary traction assembly includes an annular sling, a hand chain hoist and a ground bell; one end of the annular sling is connected to the floating hose, and the other end is connected to the hand chain hoist, the hand chain hoist is connected to the ground bell, and the ground bell is installed on the work boat.

[0016] Another aspect of the present invention provides a method for laying an offshore hose, using the above-mentioned offshore hose laying device, comprising the following steps:

[0017] Connecting the buoy: assembling multiple hoses into a hose string on an assembly bracket, then dropping the hose string onto a launch track and dragging the hose string launch track to move so that the hose string is connected to the buoy;

[0018] Connecting the hose string: Continue to assemble multiple hoses into a hose string on the assembly bracket, drop the hose string onto the launch track and connect it with the previous hose string to form a floating hose, and then move the work boat to move the floating hose along the launch track;

[0019] Repeat the Connect Hose String step to complete the floating hose lay.

[0020] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:

[0021] The offshore hose laying device provided by the present invention comprises an operating boat and a launching track, an assembly bracket and a first traction winch installed on the operating boat; the assembly bracket is used to assemble a hose string, and a plurality of hose strings are connected end to end to form a floating hose; one end of the floating hose is connected to a buoy, and the first traction winch is used to connect to an end of the floating hose away from the buoy; the operating boat moves in a direction away from the buoy to make the floating hose move along the launching track.

[0022] The offshore hose laying device provided by the present invention uses an operating vessel as a mobile platform, cooperates with the buoy of a single-point mooring system, and completes the assembly of the offshore floating hose by real-time assembly and towing, thereby avoiding the problems of a land assembly method that occupies a large area, requires floating towing only when the sea conditions are good, has high requirements for docks or seaside sites, and can effectively improve the installation efficiency and reliability.

[0023] During the specific installation, one end of the floating hose is connected to the buoy, and the other end is fixed to the working boat through the first traction winch. After the new hose string is assembled on the assembly bracket, it is connected to the assembled floating hose. Then the working boat moves away from the buoy to allow the corresponding part of the floating hose to enter the water to complete the laying. The launching track guides and conveys the relative movement of the floating hose and the working boat, which can avoid excessive friction between the two, affecting the movement of the hose and causing damage to the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a laying device for an offshore hose provided by an embodiment of the present invention;

[0026] Figure 2 Another schematic diagram of the structure of the laying device of the offshore hose provided by the embodiment of the present invention;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 It is a schematic diagram of the movement of the hose string;

[0029] Figure 5 This is a schematic diagram of the structure of the launch track;

[0030] Figure 6 is a structural schematic diagram of an assembly unit;

[0031] Figure 7 This is a schematic diagram of the structure of the launching bridge.

[0032] Icons: 100-operating boat; 200-launching track; 300-assembly bracket; 400-first traction winch; 500-launching bridge; 600-second traction winch; 700-auxiliary traction assembly; 210-support roller; 220-launching frame; 230-limiting plug rod; 240-limiting seat; 310-frame; 320-limiting rod; 311-diagonal rod; 312-vertical rod; 313-bottom rod; 314-pipe sleeve; 510-launching slide; 520-limiting stop rod; 530-support frame; 710-annular sling; 720-hand winch; 730-ground bell; a-buoy; b-floating hose; c-hose string. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] There are many uncontrollable factors in the installation process of floating hoses, making it difficult to ensure installation efficiency and reliability.

[0037] In view of this, the present invention provides a laying device for an offshore hose, comprising an operating vessel 100 and a launching track 200, an assembly bracket 300 and a first traction winch 400 installed on the operating vessel 100; the assembly bracket 300 is used to assemble a hose string c, and a plurality of hose strings c are connected end to end to form a floating hose b; one end of the floating hose b is connected to a buoy a, and the first traction winch 400 is used to connect to an end of the floating hose b away from the buoy a; the operating vessel 100 moves in a direction away from the buoy a to move the floating hose b along the launching track 200.

[0038] The offshore hose laying device provided by the present invention uses the work boat 100 as a mobile platform, cooperates with the buoy a of the single point mooring system, and completes the assembly of the offshore floating hose b by real-time assembly and dragging, thereby avoiding the problems of large land-based assembly area, good sea conditions for floating and dragging, high requirements for docks or seaside sites, and hose damage during the process of going to sea or floating and dragging. The installation efficiency and reliability can be effectively improved.

[0039] During the specific installation, one end of the floating hose b is connected to the buoy a, and the other end is fixed to the work boat 100 through the first traction winch 400. After the new hose string c is assembled on the assembly bracket 300, it is connected to the assembled floating hose b. Then the work boat 100 moves away from the buoy a to allow the corresponding part of the floating hose b to enter the water, and the laying is completed. The launching track 200 guides and transports the relative movement of the floating hose b and the work boat 100, which can avoid excessive friction between the two, affecting the movement of the hose and causing damage to the hose.

[0040] The following combination Figure 1-Figure 7 The structure and shape of the laying device of the offshore hose provided in this embodiment are described in detail:

[0041] In this embodiment, the laying device of the offshore hose further includes an underwater bridge, a second traction winch 600 and an auxiliary traction assembly 700. Figure 1 , Figure 2 The underwater bridge is installed on the work boat 100 to guide the floating hose b into the water, the second traction winch 600 is used to pull one end of the floating hose b to the buoy a to complete the connection between the buoy a and the floating hose b, and the auxiliary traction assembly 700 cooperates with the first traction winch 400 to maintain the tension of the floating hose b.

[0042] In this embodiment, the assembly bracket 300 includes a plurality of assembly units arranged along the length direction of the floating hose b, and the assembly unit includes a frame body 310 and a limiting rod 320. Figure 6 As shown. Among them, the frame 310 includes an inclined rod 311, a vertical rod 312, a bottom rod 313 and a pipe sleeve 314; the bottom rod 313 is installed on the deck of the work boat 100, one end of the vertical rod 312 is connected to the inclined rod 311, and the other end is connected to the bottom rod 313; the inclined rod 311 is arranged obliquely, and a plurality of vertical rods 312 of different lengths are correspondingly arranged to support the inclined rod 311; the pipe sleeve 314 is arranged vertically and connected to the bottom rod 313, and the limiting rod 320 is inserted into the pipe sleeve 314 and detachably connected to the pipe sleeve 314. When assembling the hose string c, multiple hoses can be placed on the assembly bracket 300, the inclined rod 311 is used to support the hose, and then the multiple hoses are connected to the hose string c. After the assembly is completed, the limiting rod 320 is pulled out of the pipe sleeve 314, so that the hose string c rolls along the inclined rod 311 under the action of gravity and falls into the launch track 200, as shown in FIG. Figure 4 shown.

[0043] In this embodiment, the limit rod 320 can be hinged to the frame 310, and the limit rod 320 can be controlled to swing by the telescopic rod, so that the limit rod 320 limits the hose string c or releases the hose string c. The limit rod 320 can be moved simultaneously by the control of the telescopic rod to avoid deformation caused by inconsistent rolling speeds of the hose string c. Compared with the plug-in disassembly method, the swinging method can avoid jamming and is conducive to the smooth movement of the limit rod 320. Obviously, the limit rod 320 can be controlled by the telescopic rod to move along its own axis. When the hose string c needs to be released, the telescopic rod drives the limit rod 320 to move downward. Similarly, the limit rod 320 can be synchronized by the telescopic rod.

[0044] In this embodiment, the launch track 200 includes a supporting roller 210, a launch frame 220, a limit rod 230 and a limit seat 240. Figure 5 As shown, the supporting rollers 210 are rotatably mounted on the launch frame 220, and a plurality of supporting rollers 210 are arranged along the length direction of the launch frame 220, and the launch frame 220 is mounted on the deck of the work boat 100; the limiting rods 230 are inserted into the limiting seats 240, and the limiting seats 240 are mounted on the deck of the work boat 100, and the limiting rods 230 are arranged on both sides of the launch frame 220. The supporting rollers 210 can reduce friction, so that the hose string c can move smoothly along the launch track 200, and the limiting rods 230 can prevent the hose string c from escaping from the launch track 200 due to inertia when entering the launch track 200 from the assembly bracket 300. Among them, the launching frame 220 is made of H-shaped steel and is fixed on the deck of the working ship 100 by welding during installation. The outer surface of the supporting roller 210 is covered with rubber to reduce the friction resistance of the hose string c when sliding. The plug-in limiting rod 230 is easy to open and close, which can control the position of the hose string c and facilitate the assembly of the hose string c of the bracket 300 to enter the track.

[0045] Furthermore, a V-shaped channel can be provided to facilitate the positioning and guiding of the hose string c, that is, two supporting rollers 210 are grouped together to form a V-shaped structure, and two groups of supporting rollers 210 are arranged along the length direction of the launch frame 220. The axes of the supporting rollers 210 are tilted in the vertical plane, and the axes of the two supporting rollers 210 are V-shaped. When the hose string c rolls from the assembly bracket 300 into the launch channel, the V-shaped channel can play a blocking role consistent with the limiting rod 320, and at the same time, the V-shaped structure can make the hose string c fall into the bottom of the V under the action of gravity, playing a role of positioning and guiding, and ensuring the smooth movement of the hose string c.

[0046] In this embodiment, the launching bridge 500 includes a launching slide 510, a limit stop bar 520 and a support frame 530. Figure 7As shown. The limiting stopper rod 520 is arranged on both sides of the launching slide 510, and is used to limit the floating hose b to prevent deviation. The launching slide 510 is installed on the support frame 530, and the support frame 530 is connected to the working boat 100. Specifically, the support frame 530 is fixed to the freeboard position at the rear of the working boat 100 by welding. The launching slide 510 is curved to guide the floating hose b to enter the water smoothly, avoiding the impact caused by the height difference between the deck of the working boat 100 and the water surface. The bending radius of the curved surface of the launching slide 510 is greater than 5 times the radius of the floating hose b, so as to ensure that the suspended section of the floating hose b will not be damaged due to excessive bending when the floating hose b enters the water from the stern. In addition, the launching slide 510 can also adopt an inclined structure.

[0047] In this embodiment, the auxiliary traction assembly 700 includes an annular sling 710, a hand chain hoist 720 and a ground bell 730; one end of the annular sling 710 is connected to the floating hose b, and the other end is connected to the hand chain hoist 720, the hand chain hoist 720 is connected to the ground bell 730, and the ground bell 730 is installed on the control winch of the workboat 100. The first traction winch 400 is connected to the end of the floating hose b located on the launch track 200 through a wire rope. During the period when the floating hose b slides into the water, the first traction winch 400 maintains a certain tension and can control the sliding speed of the floating hose b to ensure that it is safely connected to the buoy a; then the floating hose b is pulled by the auxiliary traction assembly 700 to replace the first traction winch 400, so that the floating hose b maintains tension, and then the connection between the first traction winch 400 and the floating hose b can be untied and connected to the newly assembled hose string c.

[0048] In this embodiment, a plurality of launching rails 200, an assembly bracket 300, and corresponding first traction winches 400 and auxiliary traction assemblies 700 may be provided, so as to realize simultaneous assembly of a plurality of hose strings c to improve laying efficiency.

[0049] The laying device of the offshore hose provided in this embodiment sets a launching bridge 500 and a launching track 200 as a hose sending channel to ensure that the hose enters the water smoothly and docks with the buoy a; the first traction winch 400 and the auxiliary traction assembly 700 are used as control devices to ensure the safety of the floating hose b during sliding; the assembly bracket 300 is used as an auxiliary operation line to pre-assemble the multi-section hose into multiple hose strings c, effectively improving the space utilization rate of the deck of the operation ship 100, and reducing the main line operation time, shortening the overall construction period. The laying device of the offshore hose provided in this embodiment can simultaneously perform multiple processes such as hose assembly, sending, and installation in a limited space, solving the problems of the floating hose b being limited by the site, the long waiting window period, and the high risk of floating and dragging on land, and realizing the safe and efficient installation of the multi-section, long-distance floating hose b at the engineering site, improving the economy and reliability.

[0050] Based on the offshore hose laying device provided in this embodiment, a offshore hose laying method is proposed, comprising the following steps:

[0051] Connecting buoy a: According to the design drawings of floating hose b, assemble the hose into hose string c on the assembly bracket 300, and pull out the limit rod 320 to drop the hose string c onto the launch track 200. Then connect the cable of the second traction winch 600 on buoy a to the front end of the hose string c on the launch track 200, connect the cable of the first traction winch 400 to the rear end of the hose string c, start the winch recovery cable of buoy a, drag the hose string c along the launch track 200 and the launching bridge 500 to slide close to buoy a, and complete the connection and installation of floating hose b and buoy a. When the hose string c slides, the first traction winch 400 maintains a small tonnage tension and releases the cable synchronously to prevent the hose from sliding too fast and causing the attitude to lose control.

[0052] Ship moving operation: The operator controls the work boat 100 to move away from the buoy a to release the floating hose b on the launch track 200 into the water. When the floating hose b on the launch track 200 reaches the position of the auxiliary traction assembly 700, the ship moving is stopped, and the floating hose b is connected to the hand chain hoist 720 using the annular sling 710. The hand chain hoist 720 is tightened to transfer the tension of the first traction winch 400 to the auxiliary traction assembly 700, and the connecting cable between the first traction winch 400 and the hose string c is released.

[0053] Connecting the hose string c: placing the subsequently assembled hose string c onto the launch track 200 and connecting it to the floating hose b on the launch track 200 to extend the floating hose b.

[0054] Repeat the steps of moving the boat and connecting the hose string c, connect all the hose strings c, release all the hoses to the water surface by moving the boat forward, and complete the installation of the entire hose. Figure 2 , which is a schematic diagram of assembling two floating hoses b. It should be noted that the first hose string c and the hose strings c assembled in sequence are floating hoses b, which are used to distinguish the hose strings c located on the assembly bracket 300 and the launching track 200 and not connected to the floating hoses b; that is, the part connected to the buoy a is the floating hose b, and the part not connected to the buoy a is the hose string c.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laying device for an offshore hose, characterized in that: It comprises an operating vessel (100), and a launching track (200), an assembling bracket (300) and a first traction winch (400) installed on the operating vessel (100); The assembly bracket (300) is used to assemble a hose string (c), and a plurality of hose strings (c) are connected end to end to form a floating hose (b); One end of the floating hose (b) is connected to the buoy (a), and the first traction winch (400) is used to connect to the end of the floating hose (b) away from the buoy (a); The work boat (100) moves in a direction away from the buoy (a) to move the floating hose (b) along the launching track (200).

2. The offshore hose laying device according to claim 1, characterized in that: It also includes a launching bridge (500), which is installed on the working ship (100) and located at the end of the launching track (200). The floating hose (b) moves along the launching track (200) and enters the water through the launching bridge (500).

3. The offshore hose laying device according to claim 2, characterized in that: It also includes a second traction winch (600), wherein the second traction winch (600) is installed on the buoy (a); The first traction winch (400) and the second traction winch (600) are respectively connected to two ends of the floating hose (b), and the second traction winch (600) is used to pull the floating hose (b) so that one end of the floating hose (b) is connected to the buoy (a).

4. The offshore hose laying device according to claim 3, characterized in that: It also comprises an auxiliary traction assembly (700), which is installed on the working boat (100) and is used to connect with an end of the floating hose (b) away from the buoy (a).

5. The offshore hose laying device according to claim 1, characterized in that: It comprises at least two assembly brackets (300), wherein the assembly brackets (300) are arranged on both sides of the launching track (200).

6. The offshore hose laying device according to claim 1, characterized in that: The assembly bracket (300) comprises a frame body (310) and a limiting rod (320), wherein the frame body (310) is installed on the working vessel (100), and the limiting rod (320) is connected to the frame body (310) to limit the position of the hose string (c).

7. The offshore hose laying device according to claim 6, characterized in that: The limiting rod (320) is inserted into the frame body (310) and is detachably connected to the frame body (310).

8. The offshore hose laying device according to claim 1, characterized in that: The launching track (200) comprises supporting rollers (210), and a plurality of the supporting rollers (210) are arranged along the length direction of the launching track (200).

9. The offshore hose laying device according to claim 4, characterized in that: The auxiliary traction assembly (700) comprises an endless sling (710), a hand chain hoist (720) and a ground bell (730); One end of the annular sling (710) is connected to the floating hose (b), and the other end is connected to the hand chain hoist (720). The hand chain hoist (720) is connected to the ground bell (730), and the ground bell (730) is installed on the work boat (100).

10. A method for laying an offshore hose, using the offshore hose laying device according to any one of claims 1 to 9, characterized in that: The steps include: Connecting the buoy (a): assembling a plurality of hoses into a hose string (c) on the assembly support (300), then dropping the hose string (c) onto the launch track (200) and dragging the hose string (c) along the launch track (200) to move the hose string (c) and the buoy (a); Connecting the hose string (c): continuing to assemble a plurality of hoses into a hose string (c) on the assembly support (300), dropping the hose string (c) onto the launch track (200) and connecting it with the previous hose string (c) to form a floating hose (b), and then moving the work boat (100) to move the floating hose (b) along the launch track (200); Repeat the step of connecting the hose string (c) to complete the laying of the floating hose (b).

Images