CN106080976B - Air bag type buoyancy tank supporting device of SPAR platform and using method thereof - Google Patents
Air bag type buoyancy tank supporting device of SPAR platform and using method thereof Download PDFInfo
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- CN106080976B CN106080976B CN201610424928.1A CN201610424928A CN106080976B CN 106080976 B CN106080976 B CN 106080976B CN 201610424928 A CN201610424928 A CN 201610424928A CN 106080976 B CN106080976 B CN 106080976B
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- guide frame
- buoyancy tank
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- spar platform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
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- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an air bag type buoyancy tank supporting device of a SPAR platform, which is characterized by comprising the following components: an upper support guide frame; a lower support guide frame, the upper support guide frame facing the lower support guide frame; the inner walls of the upper supporting guide frame and the lower supporting guide frame are respectively provided with a plurality of supporting devices, and the supporting devices have variable volumes; the buoyancy tank is arranged in the upper supporting guide frame and the lower supporting guide frame, and a gap is reserved between the supporting devices and the outer wall of the buoyancy tank. The airbag type buoyancy tank supporting device of the SPAR platform can effectively adjust the working clearance of the buoyancy tank according to different working conditions of installation and maintenance of the buoyancy tank and normal operation of the platform, thereby increasing the convenience of installation and maintenance of the buoyancy tank and prolonging the service life of the buoyancy tank.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to an air bag type buoyancy tank supporting device of a SPAR platform.
Background
The riser system of the SPAR platform is located in the centerwell, connected up to the production equipment of the upper module and down into the seafloor. Buoyancy tanks are a common type of riser tensioner for SPAR platforms. The buoyancy tank is positioned in the central well, is filled with air, and provides riser tension by self buoyancy, so that the vertical riser is always kept in a tension state. Because SPAR platform main part and buoyancy can riser system decoupling zero, and there is the clearance between buoyancy can support the guide frame and the buoyancy can, the buoyancy can with the platform main part relative motion in-process can with the guide frame between bump. The long term repetitive effects of the crash loads can cause fatigue failure of the buoyancy can and the lead frame, which in turn leads to failure of the riser system and fatigue damage of the support structure.
Research shows that the collision force between the buoyancy tank and the guide frame increases with the increase of the gap between the buoyancy tank and the guide frame, and when the gap is zero, even no collision effect exists. Therefore, from the viewpoint of reducing the collision force and the collision fatigue damage, it is desirable that the clearance between the buoyancy tank and the guide frame is as small as possible.
However, the smaller the gap between the buoyancy tank and the guide frame, the more difficult the installation of the buoyancy tank becomes. The diameter of a buoyancy tank of the SPAR platform is usually about 3-5 m, the length of the buoyancy tank is nearly 100m, the buoyancy tank is formed by rolling and pressing thin steel plates, and the weight of the buoyancy tank reaches hundreds of tons. The buoyancy tank can only be hoisted by the aid of cranes of other ships, the offshore installation cannot be influenced by environmental loads, and the installation is quite difficult if the gap between the buoyancy tank and the guide frame is too small.
The devices such as special-shaped rubber cushion pads, spring cushion pads, compliant guide frames and the like appear in succession in the year. These devices can reduce the destruction of collision each other to buoyancy tank, guide frame and central well leg, nevertheless do not help reducing buoyancy tank installation degree of difficulty, and even the device itself also needs to occupy certain space, has reduced buoyancy tank's installation clearance on the contrary, has increased buoyancy tank's installation degree of difficulty.
In the aspect of airbag development, China is the international leading. The existing air bag product has the bursting pressure of more than 1.5MPa and is successfully used in the launching process of ships and ocean platforms.
Therefore, a new buoyancy can supporting device using an air bag is needed.
Disclosure of Invention
To the above-mentioned problem that exists among the prior art, now provide an gasbag formula buoyancy tank strutting arrangement of SPAR platform, aim at effectively adjusting the working gap of buoyancy tank according to the different operating modes of buoyancy tank installation maintenance and platform normal operation, and then increase the convenience of buoyancy tank installation maintenance and prolong the life of buoyancy tank simultaneously.
The specific technical scheme is as follows:
a bladder buoyancy can support device for a SPAR platform having features comprising:
an upper support guide frame;
a lower support guide frame, the upper support guide frame facing the lower support guide frame;
the inner walls of the upper supporting guide frame and the lower supporting guide frame are respectively provided with a plurality of supporting devices, and the supporting devices have variable volumes;
the buoyancy tank is arranged in the upper supporting guide frame and the lower supporting guide frame, and a gap is reserved between the supporting devices and the outer wall of the buoyancy tank.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that part of the supporting device is arranged around the inner wall of the upper supporting guide frame;
the rest of the supporting devices are arranged around the inner wall of the lower supporting guide frame.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that the supporting device is an airbag.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that the airbag is in a long strip shape, and the upper end surface and the lower end surface of the airbag in the upper supporting guide frame are flush with the upper end surface and the lower end surface of the upper supporting guide frame respectively.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that the upper end surface and the lower end surface of the airbag in the lower supporting guide frame are flush with the upper end surface and the lower end surface of the lower supporting guide frame respectively.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that at least four supporting devices are respectively arranged in the upper supporting guide frame and the lower supporting guide frame.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that a gap between the outer wall of the buoyancy tank and the supporting device is 8-20 mm.
The gasbag formula buoyancy can strutting arrangement of foretell SPAR platform, wherein, the gasbag passes through the trachea with an air compressor machine and is connected, the air compressor machine is used for providing high-pressure gas.
The airbag type buoyancy tank supporting device of the SPAR platform is characterized in that a vertical pipe is arranged at the lower end of the buoyancy tank.
The use method of the air bag type buoyancy tank supporting device of the SPAR platform comprises the air bag type buoyancy tank supporting device of the SPAR platform, and has the characteristics that,
when the buoyancy tank is installed or overhauled, the air bags are deflated, so that the volume of the air bags is reduced, the inner spaces of the upper supporting and guiding frame and the lower supporting and guiding frame are increased until the gap between the outer wall of the buoyancy tank and the supporting device is 20mm, and the installation or the overhaul of the buoyancy tank is facilitated;
after the installation or the maintenance is finished, the air bag is inflated, so that the volume of the air bag is increased, the inner space of the upper supporting guide frame and the inner space of the lower supporting guide frame are reduced until the gap between the buoyancy tank and the supporting device is 8mm, and the SPAR platform performs normal operation.
The positive effects of the technical scheme are as follows:
the airbag type buoyancy tank supporting device of the SPAR platform is provided with the supporting device with the variable volume in the supporting guide frame, so that the gap between the buoyancy tank and the supporting device can be adjusted, and the airbag type buoyancy tank supporting device is flexibly suitable for different working conditions of installation of the buoyancy tank and normal operation of the platform. When the buoyancy tank is installed, high-pressure gas does not exist in the air bag and does not expand, the gap between the buoyancy tank and the supporting device is relatively large, and the hoisting difficulty of the buoyancy tank can be reduced. When the platform is in an operation state, high-pressure gas is filled to expand the air bag so as to reduce the gap between the supporting device and the buoyancy tank, and the air bag has certain pressure bearing capacity under the action of the internal high-pressure gas and can reduce the structural fatigue damage caused by the collision of the buoyancy tank. When the buoyancy tank is overhauled, high-pressure gas in the air bag is discharged, the working clearance of the buoyancy tank is increased, and therefore the hoisting difficulty of the buoyancy tank is reduced. Thereby can effectively adjust the working clearance of buoyancy jar according to the different operating modes of buoyancy jar installation maintenance and the normal operation of platform, and then increase the convenience of buoyancy jar installation maintenance and prolong the life of buoyancy jar simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the airbag type buoyancy can supporting device of the SPAR platform.
Fig. 2 is a schematic view of another angle of the bladder support device of the SPAR platform of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments specifically describe the technical solutions provided by the invention with reference to fig. 1 to 2.
Fig. 1 is a schematic structural diagram of the airbag type buoyancy can supporting device of the SPAR platform. Fig. 2 is a schematic view of another angle of the bladder support device of the SPAR platform of the present invention. Referring to fig. 1 to 2, there is shown a bladder support apparatus for a SPAR platform, having the following features: an upper supporting guide frame 1, a lower supporting guide frame 2, a buoyancy tank 3 and a plurality of supporting devices 4.
Specifically, the lower support guide frame 2 is disposed below the upper support guide frame 1. The upper supporting guide frame 1 and the lower supporting guide frame 2 are communicated in the vertical direction, and the communicating direction of the upper supporting guide frame 1 and the lower supporting guide frame 2 is opposite. The buoyancy tank 3 is arranged in the upper support guide frame 1 and the lower support guide frame 2 with a gap. The inner walls of the upper supporting guide frame 1 and the lower supporting guide frame 2 are respectively provided with a plurality of supporting devices 4, and the volumes of the supporting devices 4 are variable. Gaps are reserved between the plurality of supporting devices 4 and the outer wall of the buoyancy tank 3.
Through the arrangement, the size of the supporting device can be changed, so that the gap between the buoyancy tank and the supporting device can be adjusted according to different working conditions. When the buoyancy tank is installed, the size of the supporting device is reduced, so that the gap between the buoyancy tank and the supporting device is relatively large, and the hoisting difficulty of the buoyancy tank can be reduced. When the platform is in an operation state, the volume of the supporting device is increased to reduce the gap between the supporting device and the buoyancy tank, so that the structural fatigue damage caused by collision of the buoyancy tank is reduced. When the buoyancy tank is overhauled, the size of the supporting device is reduced, and the gap between the buoyancy tank and the supporting device is increased, so that the hoisting difficulty of the buoyancy tank is reduced.
Further, in a preferred embodiment, the support devices 4 are uniformly arranged around the circumference of the buoyancy tank 3.
Through the arrangement, the periphery of the buoyancy tank can be uniformly supported, so that the buoyancy tank can be prevented from being locally collided to cause structural fatigue damage.
In addition, in a preferred embodiment, the support device 4 is an airbag with high burst strength.
As a preferable scheme, the bursting pressure of the air bag is 1.5MPa, the safety factor is 1.5, and the air bag is filled with high-pressure gas of 1.0MPa in the normal operation state of the platform. The gasbag has certain bearing capacity under inside high-pressure gas effect, compares other materials, can effectively reduce the structure fatigue damage that the buoyancy tank collision arouses more.
Meanwhile, in a preferred embodiment, the airbag is elongated, and an upper end surface and a lower end surface of the airbag respectively exceed an upper end surface and a lower end surface of the upper support guide frame 1 or the lower support guide frame 2.
Through the arrangement, the contact area of the buoyancy tank and the air bag in the height direction can be increased, so that the buoyancy tank is uniformly stressed when in contact with the air bag, and the buoyancy tank is prevented from deforming.
Preferably, the effective contact surface of the air bag and the buoyancy tank 3 is rectangular with the height of 3.0m and the width of 0.5m, and the single-layer air bag can provide the supporting force of at least 150 t.
Meanwhile, in a preferred embodiment, at least four supporting devices 4 are respectively arranged in the upper supporting guide frame 1 and the lower supporting guide frame 2.
Preferably, the airbag may be disposed at a boundary between each two adjacent sidewalls of the support guide frame.
In addition, in a preferred embodiment, the gap between the outer wall of the buoyancy tank 3 and the support device 4 is 8mm-20 mm.
Through the arrangement of the embodiment, when the SPAR platform is in a normal operation state, the gap between the supporting device and the buoyancy tank is 8mm, which is beneficial to reducing the collision force of the buoyancy tank. When the SPAR platform is installed or overhauled in the buoyancy tank state, the gap between the support device and the buoyancy tank is 20mm after the support device is contracted, and the hoisting difficulty of the buoyancy tank can be reduced.
Also, in a preferred embodiment, the air bag is connected to an air compressor (not shown) through an air pipe, and the air compressor is used for providing high-pressure air.
As a preferable scheme, the high-pressure gas in the above embodiment can be provided by a special air compressor, or can be provided by other air compressors of the SPAR platform.
In addition, in a preferred embodiment, the buoyancy tank 3 is provided with a riser 5 at its lower end.
With the above arrangement, the buoyancy tank provides tension to the riser through its own benefits.
In addition, the invention also comprises a use method of the airbag type buoyancy tank supporting device of the SPAR platform, which comprises the following specific steps:
when the buoyancy tank is installed or overhauled, the air bags are deflated, so that the volume of the air bags is reduced, the inner spaces of the upper supporting and guiding frame and the lower supporting and guiding frame are increased until the gap between the outer wall of the buoyancy tank and the supporting device is 20mm, and the installation or the overhaul of the buoyancy tank is facilitated;
after the installation or the maintenance is finished, the air bag is inflated, so that the volume of the air bag is increased, the inner space of the upper supporting guide frame and the inner space of the lower supporting guide frame are reduced until the gap between the buoyancy tank and the supporting device is 8mm, and the SPAR platform performs normal operation.
The gasbag formula buoyancy tank strutting arrangement of SPAR platform that this embodiment provided sets up changeable strutting arrangement of volume through in supporting the guide frame to can realize that the clearance between buoyancy tank and the strutting arrangement is adjustable, the different operating modes of nimble buoyancy tank installation and the normal operation of platform of adaptation. When the buoyancy tank is installed, high-pressure gas does not exist in the air bag and does not expand, the gap between the buoyancy tank and the supporting device is relatively large, and the hoisting difficulty of the buoyancy tank can be reduced. When the platform is in an operation state, high-pressure gas is filled to expand the air bag so as to reduce the gap between the supporting device and the buoyancy tank, and the air bag has certain pressure bearing capacity under the action of the internal high-pressure gas and can reduce the structural fatigue damage caused by the collision of the buoyancy tank. When the buoyancy tank is overhauled, high-pressure gas in the air bag is discharged, the working clearance of the buoyancy tank is increased, and therefore the hoisting difficulty of the buoyancy tank is reduced. Thereby can effectively adjust the working clearance of buoyancy jar according to the different operating modes of buoyancy jar installation maintenance and the normal operation of platform, and then increase the convenience of buoyancy jar installation maintenance and prolong the life of buoyancy jar simultaneously.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a SPAR platform with gasbag formula buoyancy can strutting arrangement which characterized in that includes:
an upper support guide frame;
a lower support guide frame, the upper support guide frame facing the lower support guide frame;
the inner walls of the upper supporting guide frame and the lower supporting guide frame are respectively provided with a plurality of supporting devices, and the supporting devices have variable volumes;
the supporting device is an air bag;
the buoyancy tank is arranged in the upper supporting guide frame and the lower supporting guide frame, and gaps are reserved between the supporting devices and the outer wall of the buoyancy tank;
when the buoyancy tank is installed or overhauled, the air bags are deflated, so that the volume of the air bags is reduced, the inner spaces of the upper supporting and guiding frame and the lower supporting and guiding frame are increased until the gap between the outer wall of the buoyancy tank and the supporting device is 20mm, and the installation or the overhaul of the buoyancy tank is facilitated;
after the installation or the maintenance is finished, the air bag is inflated, so that the volume of the air bag is increased, the inner space of the upper supporting guide frame and the inner space of the lower supporting guide frame are reduced until the gap between the buoyancy tank and the supporting device is 8mm, and the SPAR platform performs normal operation.
2. The SPAR platform with bladder buoyancy can support device of claim 1, wherein part of the support device is disposed around the inner wall of the upper support guide frame;
the rest of the supporting devices are arranged around the inner wall of the lower supporting guide frame.
3. The SPAR platform with a bladder-type buoyancy can support device of claim 2, wherein the bladder is elongated and the upper and lower end surfaces of the bladder within the upper support guide frame are flush with the upper and lower end surfaces of the upper support guide frame, respectively.
4. The SPAR platform with a bladder type buoyancy can support device of claim 3, wherein the upper and lower end surfaces of the bladder in the lower support guide frame are flush with the upper and lower end surfaces of the lower support guide frame, respectively.
5. The SPAR platform with bladder type buoyancy can support device of claim 2, wherein at least four support devices are respectively disposed in the upper support guide frame and the lower support guide frame.
6. The SPAR platform with bladder buoyancy can support device of claim 1, wherein the gap between the outer wall of the buoyancy can and the support device is 8mm-20 mm.
7. The SPAR platform with bladder type buoyancy can support device of claim 2, wherein the bladder is connected to an air compressor through an air pipe, the air compressor is used for providing high pressure air.
8. The SPAR platform with bladder type buoyancy can support device of claim 1, wherein the buoyancy can is provided with a riser at its lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424928.1A CN106080976B (en) | 2016-06-15 | 2016-06-15 | Air bag type buoyancy tank supporting device of SPAR platform and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610424928.1A CN106080976B (en) | 2016-06-15 | 2016-06-15 | Air bag type buoyancy tank supporting device of SPAR platform and using method thereof |
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| CN106080976A CN106080976A (en) | 2016-11-09 |
| CN106080976B true CN106080976B (en) | 2020-09-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107187557B (en) * | 2017-05-26 | 2020-04-24 | 中国船舶工业集团公司第七0八研究所 | Cellular elastic supporting device of SPAR ocean platform buoyancy tank |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002084068A1 (en) * | 2001-04-11 | 2002-10-24 | Cso Aker Maritime, Inc. | Compliant buoyancy can guide |
| EP1398267A1 (en) * | 2002-09-11 | 2004-03-17 | Mentor Subsea Technology Services, Inc. | Compliant buoyancy cans and guides for stem pipe of risers |
| CN101657351A (en) * | 2007-04-13 | 2010-02-24 | 国际壳牌研究有限公司 | Spar structures |
| CN101821158A (en) * | 2007-10-12 | 2010-09-01 | 霍顿深水发展系统有限公司 | Tube buoyancy can system |
| CN103112555A (en) * | 2013-01-04 | 2013-05-22 | 中国石油大学(华东) | Typhoon-resistant drilling riser buoyancy tank device |
-
2016
- 2016-06-15 CN CN201610424928.1A patent/CN106080976B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002084068A1 (en) * | 2001-04-11 | 2002-10-24 | Cso Aker Maritime, Inc. | Compliant buoyancy can guide |
| EP1398267A1 (en) * | 2002-09-11 | 2004-03-17 | Mentor Subsea Technology Services, Inc. | Compliant buoyancy cans and guides for stem pipe of risers |
| CN101657351A (en) * | 2007-04-13 | 2010-02-24 | 国际壳牌研究有限公司 | Spar structures |
| CN101821158A (en) * | 2007-10-12 | 2010-09-01 | 霍顿深水发展系统有限公司 | Tube buoyancy can system |
| CN103112555A (en) * | 2013-01-04 | 2013-05-22 | 中国石油大学(华东) | Typhoon-resistant drilling riser buoyancy tank device |
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| CN106080976A (en) | 2016-11-09 |
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