Ocean platform towing device

Abstract

The utility model discloses an ocean platform towing device relates to ocean engineering technical field, including towing system and wave resistance reduction device, towing system is used for connecting between tugboat and ocean platform to make tugboat can drag ocean platform sailing, wave resistance reduction device is provided on the mooring rope of towing system, and wave resistance reduction device is provided on the mooring rope of towing system. In the marine navigation process following the towing system, waves on a towing path can be broken, namely, waves facing the towing direction can be broken. According to the utility model, larger waves are broken and the wave height is reduced firstly, so that the wave resistance at the head part of the ocean platform during towing can be reduced, the stress of a towing system is reduced, the towing safety is ensured, and the capability of resisting severe sea conditions during towing of the platform is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of marine engineering, and more specifically to a marine platform towing device. Background Art

[0002] When a mobile offshore platform is operating in an offshore oil field, it often needs to be towed to move. Since the platform has no propulsion system, it must be towed by a tugboat. The tugboat is connected to the platform through a towing system. Before towing, the towing resistance that may be encountered during towing must be calculated, and the power of the tugboat required must be calculated according to the towing resistance, and then the tugboat can be selected. The towing system consists of a towing eye plate, a dragon's whisker cable, a wire rope, a shackle, etc. After calculating the towing resistance, the minimum breaking strength of the towing cable and its accessories can be calculated according to the relevant formula, and a suitable towing system can be selected according to the breaking strength.

[0003] Towing resistance has a decisive influence on the selection of tugboats and towing systems, mainly including friction resistance, residual resistance, wave resistance and wind resistance. In severe sea conditions, wave resistance will increase sharply, which may lead to dangerous safety accidents such as reverse towing and towing system breakage. With the expansion of the operating area of ​​mobile platforms, the possibility of encountering severe winds and waves during long-distance towing is increasing, which poses a major safety hazard to offshore oil field production.

[0004] The existing technology reduces wave resistance and wave-making resistance by designing the offshore platform as a streamlined ship or adding a bulbous bow to the bow, thereby reducing towing resistance. However, compared with the traditional square platform, although this design can reduce resistance to a certain extent, it also brings new problems. For example, the streamlined design reduces the deck area, making it difficult to arrange equipment and living buildings. In addition, the streamlined design also reduces the total capacity of the ballast tank, which has an adverse effect on the pre-compression capacity of the platform.

[0005] Therefore, designing an ocean platform towing device that can effectively reduce the platform towing resistance and improve the safety of platform towing has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0006] In view of this, an object of the utility model is to provide a marine platform towing device to reduce the platform towing resistance and improve the platform towing safety.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A marine platform towing device, used for towing a marine platform by a tugboat, comprising:

[0009] A towing system, used for connecting between the tugboat and the offshore platform;

[0010] The wave resistance reduction device is arranged on the towing system and is used for breaking the waves on the towing path.

[0011] Optionally, in the above-mentioned marine platform towing device, the wave resistance reduction device includes:

[0012] A water pump having a water inlet and a water outlet, wherein the water inlet is arranged below the horizontal plane and is connected to the water outlet to pump seawater to the water outlet;

[0013] The injection member is connected to the water outlet, and the nozzle faces forward in the towing direction, and is used for high-pressure injection of seawater.

[0014] Optionally, in the above-mentioned marine platform towing device, a pump mounting frame is provided on the towing system, the water pump is arranged on the pump mounting frame and is partially or completely arranged below the horizontal plane, and the injection member is arranged at the horizontal plane.

[0015] Optionally, in the above-mentioned marine platform towing device, a drag reduction shell is provided on the pump mounting frame, the drag reduction shell has a streamlined shape, the water pump is arranged in the drag reduction shell, and the water intake port and the water outlet are both exposed from the drag reduction shell.

[0016] Optionally, in the above-mentioned marine platform towing device, the wave resistance reduction device is detachably arranged on the pump mounting frame; and / or,

[0017] The pump mounting bracket is adjustably arranged on the towing system.

[0018] Optionally, in the above-mentioned marine platform towing device, one water outlet is connected to a plurality of the injection members, and each of the injection members faces a different direction; or,

[0019] The injection member is rotatably arranged at the water outlet.

[0020] Optionally, in the above-mentioned marine platform towing device, the wave resistance reduction device is connected to the marine platform through a waterproof cable so as to be powered by the marine platform.

[0021] Optionally, in the above-mentioned marine platform towing device, the towing system includes:

[0022] A tugboat towline, used for connecting to the tugboat;

[0023] A platform towline, one end of which is connected to the tugboat towline, and the other end of which is used to connect to the offshore platform, wherein the wave resistance reduction device is at least arranged on one of the platform towline and the tugboat towline.

[0024] Optionally, in the above-mentioned marine platform towing device, there are at least two platform tow cables, and there are at least two wave resistance reduction devices, which are symmetrically arranged on the platform tow cables.

[0025] Optionally, in the above-mentioned marine platform towing device, the platform tow cable and the tugboat tow cable are connected via a towing triangle, and the wave resistance reduction device is provided on the main tow cable of the towing triangle.

[0026] The marine platform towing device provided by the utility model is used for platform towing conditions, especially conditions where wave resistance accounts for a relatively large proportion of the platform towing resistance. It comprises a towing system and a wave resistance reducing device. The towing system is used to be connected between a tugboat and the marine platform so that the tugboat can tow the marine platform for navigation. The wave resistance reducing device is arranged on the cable of the towing system and can break the waves on the towing path during the sea navigation following the towing system, that is, it can break the waves facing the towing direction.

[0027] During towing, the offshore platform is connected to the tugboat through the towing system. When encountering severe sea conditions such as strong winds and waves, the resistance of the platform towing will be very large. The wave resistance reduction device can break the waves near the water surface and disturb the sea current, so that when the waves are broken and continue to reach the bow of the offshore platform, their wave height can be greatly reduced, and even the direction of the wave can be changed. According to the theory that wave resistance increases sharply with the increase of wave height, the resistance will be greatly reduced when the waves reach the bow of the offshore platform after breaking, which can reduce the potential accidents caused by excessive towing resistance in severe sea conditions, making towing safer.

[0028] Compared with the prior art, the marine platform towing device provided by the utility model can break up larger waves first and reduce wave height, thereby reducing the wave resistance of the bow of the marine platform during towing, reducing the stress on the towing system, ensuring the safety of towing, improving the ability of the platform to tow against severe sea conditions, and also increasing the range of selectable tugboats and the towing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the towing of the marine platform towing device disclosed in the embodiment of the utility model;

[0031] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0032] Among them, 1 is a distribution board, 2 is a towing eye plate, 3 is a waterproof cable, 4 is a pump mounting frame, 5 is a towing cable connecting buckle, 6 is a towing triangle, 7 is a platform towing cable, 8 is a tugboat bollard, 9 is a tugboat towing cable, 10 is a water outlet, 11 is a water suction port, 12 is an injection part, 13 is a water pump, 14 is an offshore platform, and 15 is a tugboat. DETAILED DESCRIPTION

[0033] The core of the utility model is to disclose a marine platform towing device to reduce the platform towing resistance and improve the platform towing safety.

[0034] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0035] Combination Figure 1 and Figure 2 The marine platform towing device disclosed in the embodiment of the utility model is used for the working condition of towing the marine platform 14 by the tugboat 15, that is, for the platform towing working condition, especially the working condition where the wave resistance accounts for a large proportion of the platform towing resistance. The marine platform towing device includes a towing system and a wave resistance reduction device. The towing system is used to be connected between the tugboat 15 and the marine platform 14, so that the tugboat 15 can tow the marine platform 14 for navigation. The wave resistance reduction device is arranged on the cable of the towing system, and can break the waves on the towing path during the sea navigation following the towing system, that is, it can break the waves facing the towing direction.

[0036] During towing, the ocean platform 14 is connected to the tugboat 15 through the towing system. When encountering severe sea conditions such as strong winds and waves, the resistance of the platform towing will be very large. The wave resistance reduction device can break the waves near the water surface and disturb the sea current, so that when the waves continue to reach the bow of the ocean platform 14 after being broken, their wave height can be greatly reduced, and even the direction of the wave can be changed. According to the theory that wave resistance rises sharply with the increase of wave height, the resistance will be greatly reduced when the waves reach the bow of the ocean platform 14 after breaking, thereby reducing the potential accident caused by excessive towing resistance in severe sea conditions, making towing safer.

[0037] Compared with the prior art, the marine platform towing device disclosed in the embodiment of the utility model can break up larger waves first and reduce the wave height, thereby reducing the wave resistance of the bow of the marine platform 14 during towing, reducing the stress on the towing system, ensuring the safety of towing, improving the ability of the platform to tow against severe sea conditions, and can also increase the range of selectable tugboats 15 and increase the towing speed.

[0038] Specifically, in one embodiment, the wave resistance reduction device includes a water pump 13 and a jet component 12. The water pump 13 has a water inlet 11 and a water outlet 10. The water inlet 11 is used to be arranged below the horizontal plane and communicated with the water outlet 10, and can pump seawater to the water outlet 10. The jet component 12 is arranged in communication with the water outlet 10, and its nozzle faces forward in the towing direction, that is, when the tugboat 15 is traveling forward, the jet component 12 is arranged toward the forward direction of the tugboat 15, and can perform high-pressure jetting of seawater to break the waves.

[0039] The jet component 12 may be a high-pressure jet structure such as a jet net or a nozzle, and the corresponding jet structure may be selected according to the actual situation. The jet component 12 may generate a large area of ​​high-pressure water flow for high-pressure water jetting, and the water ejected by the water pump 13 may generate a jet after passing through the jet component 12, and spray toward the oncoming waves, which may destroy the conditions for the formation of wave resistance and wave resistance, thereby achieving the effects of reducing wave amplitude, destroying the complete waveform, reducing the actual wave height, and reducing wave resistance, thereby increasing the safety of towing at sea.

[0040] In one embodiment, the jetting member 12 includes a jetting pipe and a jetting net. The jetting pipe is used to be connected to the water outlet 10 of the water pump 13, and the outlet of the jetting pipe faces the oncoming sea current. The jetting net is arranged at the outlet of the jetting pipe, and is used to generate a high-pressure jet under the action of the water pump 13 and spray it toward the oncoming sea current, thereby achieving the effect of breaking waves. Different types of jetting nets can be designed and selected according to the different types of waves encountered during towing and the size of the waves. The nozzle of the jetting net is arranged at the water surface, and the closer to the water surface, the better the effect.

[0041] Specifically, the water pump 13 is arranged on the towing system through the pump mounting frame 4. The pump mounting frame 4 is generally columnar or rod-shaped, one end of which can be fixed on the towing system, and the other end can extend below the horizontal plane, and has an installation position for the water pump 13. The water pump 13 is arranged on the pump mounting frame 4, preferably an electric submersible pump, and can be partially or completely arranged below the horizontal plane to ensure that the water suction port 11 can suck seawater. The injection member 12 is arranged at the horizontal plane or slightly above the horizontal plane, and can spray waves on the water surface.

[0042] One end of the pump mounting frame 4 may be provided with a cable through-hole for the cable of the towing system to pass through, or a separately provided connector is preferably used to realize the detachable connection between the pump mounting frame 4 and the towing system. The pump mounting frame 4 is preferably a frame structure to reduce the structural weight.

[0043] In some embodiments, the water pump 13 may not be set in the water, but a water suction pipe may be connected to the water inlet 11, and it is only necessary to ensure that the water suction pipe enters the water. For example, the bottom of the pump mounting frame 4 is set to enter the water, and the water suction pipe is fixed on the pump mounting frame 4 so that it can enter the water along with the pump mounting frame 4, or the water suction pipe is set with a certain counterweight so that it can enter the water under the action of gravity to ensure stable water absorption. In this embodiment, the water pump 13 can be replaced by a conventional other type of water suction pump with waterproof function.

[0044] The above-mentioned installation position can be a plurality of fixed holes, which is convenient for adjusting the position of the water pump 13 on the pump mounting frame 4 according to different drafts and waves of different sizes, so as to adjust the installation height and have strong adaptability. In addition, the pump mounting frame 4 is adjustably arranged on the towing system to facilitate the adjustment of the installation position of the wave resistance reduction device.

[0045] Preferably, a drag reduction housing is provided on the pump mounting frame 4, and the drag reduction housing has a streamlined shape. The water pump 13 is arranged in the drag reduction housing to reduce the resistance of the water pump 13 when moving in the water, and the water intake port 11 and the water outlet 10 are both exposed to the drag reduction housing.

[0046] It is understandable that the electric submersible pump has a built-in waterproof function. In order to further enhance its waterproofness, the drag reduction housing can be set as a waterproof housing, and the water pump 13 can be further protected.

[0047] A further optimization scheme is to set the wave resistance reduction device to spray water in multiple directions, for example, a water outlet 10 of a water pump 13 is connected to multiple injection members 12, and one of the injection members 12 is facing directly in front of the towing direction, and the remaining injection members 12 are also set in front of the towing direction, but have a certain angle with the front, so as to ensure that the wave resistance reduction device can perform high-pressure water spraying within a range of 180° (or less than the angle range) in front of the towing direction at the location of the water pump 13. According to the location and number of the water pump 13 and the actual injection distance and range of each injection member 12, the number and installation angle of the injection members 12 can be adaptively adjusted.

[0048] Alternatively, when the number of the injection members 12 is small, the injection members 12 can be arranged to rotate so as to perform injection in multiple directions. For example, a rotating shaft can be arranged on the pump mounting frame 4, and the injection member 12 can rotate together with the rotating shaft. By arranging a corresponding driving motor on the pump mounting frame 4 to drive the rotating shaft to rotate, the injection angle of the injection member 12 can be adjusted, so that during the navigation process, the wave resistance reduction device can spray and crush waves at multiple positions in front of the towing direction or at a specified position.

[0049] In addition, setting the water pump 13 or the pump mounting frame 4 as a rotatable structure relative to the towing system is also a feasible way to adjust the injection direction of the injection member 12, which will not be repeated here.

[0050] Preferably, the water pump 13 is detachably arranged on the pump mounting frame 4. When the platform towing is completed or the weather is good and the towing speed is low, and the water pump 13 does not need to work, the towing system and the water pump 13 can be folded up, and the injection component 12 and the pump mounting frame 4 can be removed for storage to reduce the occupation of the deck space.

[0051] It is understandable that the water pump 13 is preferably connected to the offshore platform 14 via the waterproof cable 3 so as to be powered by the offshore platform 14 to ensure the stability and continuity of the operation of the water pump 13. The offshore platform 14 has a platform power supply system, which has a distribution board 1, which can be connected to the waterproof cable 3 for power supply and can detect whether the wave resistance reduction device can work normally.

[0052] Combination Figure 2 The waterproof cable 3 is connected to the water pump 13 in the water at the pump mounting frame 4. The water pump 13 is powered on and starts. The water pump 13 sucks in seawater to generate a high-pressure water flow, which is sprayed toward the oncoming waves through the spraying member 12, thereby reducing the actual wave height, reducing the wave resistance of the platform, and ensuring the safety of the platform. The waterproof cable 3 can be partially fixed to the towing system and arranged along the layout of the towing system to ensure the orderliness of the layout of the waterproof cable 3.

[0053] In a specific embodiment disclosed in the present utility model, the towing system includes a tugboat tow cable 9 and a platform tow cable 7, wherein the tugboat tow cable 9 is used to connect to the tugboat 15, one end of the platform tow cable 7 is connected to the tugboat tow cable 9, and the other end is used to connect to the offshore platform 14, and the wave resistance reduction device is arranged on at least one of the platform tow cable 7 and the tugboat tow cable 9.

[0054] Among them, combined Figure 1 There are at least two platform tow cables 7, which are connected to the ocean platform 14 in an inclined and symmetrical manner to ensure the stability of the force on the ocean platform 14. The water pumps 13 are arranged at different positions on the inclined platform tow cables 7 to increase the spray range of the waves and improve the effect of breaking the waves in front of the towing direction of the ocean platform 14. And because the platform tow cables 7 are closer to the ocean platform 14 than the tugboat tow cables 9, the wave resistance reduction device is preferably arranged on the platform tow cables 7 to be able to break the waves close to the ocean platform 14. The wave resistance reduction device is preferably symmetrically arranged on the two platform tow cables 7 to further ensure the stability of the force on the ocean platform 14 and facilitate the towing of the tugboat 15.

[0055] The number of wave resistance reduction devices can be increased or decreased according to actual conditions. For example, before towing in some areas, the weather forecast and the possible sea areas to be passed should be studied to determine the possibility of severe sea conditions. When it is determined that towing is at risk of strong winds and waves, wave resistance reduction devices can be installed at three or more different locations of the towing system.

[0056] Combination Figure 2 , two platform tow cables 7 and tugboat tow cables 9 are connected through towing triangle 6. A towing eye plate 2 is provided on the offshore platform 14, the platform tow cables 7 are connected to the towing eye plate 2, the towing triangle 6 is connected to the tugboat tow cables 9 through the tow cable connecting buckle 5, a tugboat bollard 8 is provided on the tugboat 15, and the tugboat tow cables 9 are fixed to the tugboat bollard 8.

[0057] It is understandable that the platform tow cable 7 and the tugboat tow cable 9 are usually directly arranged on the ocean platform 14 and the tugboat 15 respectively. When towing is required, the platform tow cable 7 and the tugboat tow cable 9 are connected through the towing triangle plate 6 for use.

[0058] Combination Figure 1 In one embodiment, two platform towing cables 7 are connected to the towing eye plate 2 at the platform end, and are connected to the towing triangle 6 after being led out. The main towing cable of the towing triangle 6 is connected to the tugboat towing cable 9 through the towing cable connecting buckle 5, and the tugboat towing cable 9 is tied to the tugboat bollard 8 of the tugboat 15. A pump mounting bracket 4 is provided on the two platform towing cables 7 and the main towing cables of the towing triangle 6, and a water pump 13 is installed on each pump mounting bracket 4. The platform power supply distribution board 1 leads the waterproof cable 3 to the pump mounting bracket 4 and connects it to the water pump 13. The water pump 13 enters the water, and the position of the injection component 12 is approximately above or below the water surface. When the platform encounters wind and waves during towing, the waterproof cable 3 is energized to drive the water pump 13. The water pump 13 generates a high-pressure jet of water to break the waves through the injection component 12 to reduce wave resistance.

[0059] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. An offshore platform towing device, used for towing an offshore platform (14) by a tugboat (15), characterized in that: include: A towing system, used for connecting between the tugboat (15) and the offshore platform (14); The wave resistance reduction device is arranged on the towing system and is used for breaking the waves on the towing path.

2. The offshore platform towing device according to claim 1, characterized in that: The wave resistance reduction device comprises: A water pump (13) having a water inlet (11) and a water outlet (10), wherein the water inlet (11) is arranged below a horizontal plane and is in communication with the water outlet (10) so as to pump seawater to the water outlet (10); The injection member (12) is connected to the water outlet (10), and the nozzle faces forward in the towing direction, and is used for high-pressure injection of seawater.

3. The offshore platform towing device according to claim 2, characterized in that: A pump mounting frame (4) is provided on the towing system, the water pump (13) is arranged on the pump mounting frame (4) and is partially or completely arranged below a horizontal plane, and the injection member (12) is arranged on a horizontal plane.

4. The offshore platform towing device according to claim 3, characterized in that: The pump mounting frame (4) is provided with a drag reduction housing having a streamlined shape. The water pump (13) is arranged in the drag reduction housing, and the water suction port (11) and the water outlet (10) are both exposed from the drag reduction housing.

5. The offshore platform towing device according to claim 3, characterized in that: The wave resistance reduction device is detachably arranged on the pump mounting frame (4); and / or, The pump mounting frame (4) is arranged on the towing system in an adjustable manner.

6. The offshore platform towing device according to claim 2, characterized in that: One of the water outlets (10) is connected to a plurality of the injection members (12), and each of the injection members (12) faces a different direction; or, The injection member (12) is rotatably arranged on the water outlet (10).

7. The offshore platform towing device according to any one of claims 1 to 6, characterized in that: The wave resistance reduction device is connected to the offshore platform (14) via a waterproof cable (3) so as to be powered by the offshore platform (14).

8. The offshore platform towing device according to any one of claims 1 to 6, characterized in that: The towing system comprises: A tugboat towline (9) for connecting to the tugboat (15); A platform tow cable (7), one end of which is connected to the tugboat tow cable (9), and the other end of which is used to connect to the offshore platform (14), and the wave resistance reduction device is at least arranged on one of the platform tow cable (7) and the tugboat tow cable (9).

9. The offshore platform towing device according to claim 8, characterized in that: There are at least two platform tow cables (7), and there are at least two wave resistance reduction devices, which are symmetrically arranged on the platform tow cables (7).

10. The offshore platform towing device according to claim 8, characterized in that: The platform tow cable (7) and the tugboat tow cable (9) are connected via a towing triangle (6), and the wave resistance reduction device is provided on the main tow cable of the towing triangle (6).

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