CN106828782B - The tension type anchor leg floating drum of single-point unloading system - Google Patents
The tension type anchor leg floating drum of single-point unloading system Download PDFInfo
- Publication number
- CN106828782B CN106828782B CN201710016925.9A CN201710016925A CN106828782B CN 106828782 B CN106828782 B CN 106828782B CN 201710016925 A CN201710016925 A CN 201710016925A CN 106828782 B CN106828782 B CN 106828782B
- Authority
- CN
- China
- Prior art keywords
- floating drum
- anchor leg
- tension type
- type anchor
- unloading system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
- B63B27/25—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines for fluidised bulk material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
Abstract
The present invention relates to offshore oil unloading pipe mooring technical field more particularly to the tension type anchor leg floating drums of single-point unloading system.It includes tension type anchor leg floating drum, the tension type anchor leg floating drum includes buoyancy mooring part, structure and it is characterized in that, buoyancy mooring part is cylindrical, damping ballast portion is arranged at the bottom of buoyancy mooring part, and the damping ballast portion includes the annular canister and ballast tank being mounted at buoyancy mooring section bottom center.Invention increases scantling drafts and wet structure area, to increase the additional mass and additional damping of structure.
Description
Technical field
The present invention relates to offshore oil unloading pipe mooring technical field more particularly to the tension type anchors of single-point unloading system
Leg floating drum.
Background technique
Single-point unloading system is the emptying method of currently used offshore oil transport, it is instead of traditional harbour emptying
Mode, its advantage is that: it can build in any desired offshore position, not limited by navigation channel and the depth of water.The disadvantage is that: due to floating
The size of cylinder is smaller, its movement often results in the oil hose of floating drum lower end during the motion under the effect of marine environment load
Biggish curvature is generated, especially in the biggish sea area of tidal range, maximum dynamic curvature is greater than 1.2, and current hose technology
It can only accomplish 0.5 curvature allowable, so as to cause excessive hose damage, greatly reduce the service life of hose, in engineering not
Obtain the normal operation for not using the method for frequent (about one year period) replacement hose to keep system.
Since oil hose to be guaranteed is under the conditions of extreme high water level and maximum wave height, length is met the requirements.Therefore,
Under conditions of extreme low water level and maximum wave height, when floating drum is in trough, oil hose is in lantern-shaped, and curvature is maximum quiet
State curvature.In the biggish sea area of tidal range, maximum static state curvature have reached or close to hose curvature allowable, therefore, the water of floating drum
Power performance just becomes the key that can the dynamic curvature of hose meet the requirements.Currently, there are two types of structure-circles of form for floating drum
Tubular and rectangular, two kinds of structures are all made of catenary anchor leg mooring (CALM), since floating drum size is smaller, shallower draft (about 2 meters),
Motion amplitude is larger under the action of wind, wave, stream, therefore, it is necessary to meet wanting for catenary mooring system using longer anchor chain
It asks, i.e. for anchor not by the effect of vertical force, the horizontal distance of anchor point and floating drum is far longer than the 3 of common catenary mooring system
Times depth of water, has been more than 5 times of depth of waters.
Due to floating drum top and it is not equipped with heavy equipment, lifting capacity is mainly the weight of spar structures, therefore, in shallow draft
Under the conditions of, the stability of floating drum can be obtained by satisfaction.In addition, limited by underwater hose curvature, current spar structures are not yet
Hydrodynamic can be reduced by increasing drinking water.Importantly, since single-point unloading system usually build deep water in less than 50
The offshore position of rice, can not be general using the deep drinking water of Spar platform and marine wind electric field foundation structure in offshore platform
Thought-center of gravity is lower than centre of buoyancy.So current single-point floating drum still uses cylinder or direction structure, always without solving hose early stage
The problem of damage.
Existing single-point unloading system oil hose is under the conditions of most of design conditions, greater than hose in dynamic curvature formula
Curvature allowable causes the replacement cycle of hose to greatly shorten to cause the early damage of hose, domestic only several single-points
Unloading system requires replacement hose every year.
Summary of the invention
The technical problem to be solved by the present invention is to how overcome the deficiencies of the prior art and provide the tensioning of single-point unloading system
Formula anchor leg floating drum.
The present invention to achieve the above object the technical solution adopted is that: the tension type anchor leg floating drum of single-point unloading system, packet
Include catenary suspension type continuous vulcanization anchor leg floating drum, the catenary suspension type continuous vulcanization anchor leg floating drum includes buoyancy mooring part, structure and it is characterized in that, the buoyancy
Mooring part is cylindrical, and damping ballast portion is arranged at the bottom of buoyancy mooring part, and the damping ballast portion includes peace
Annular canister at buoyancy mooring section bottom center, the inner cavity of the annular canister form ballast tank and press to be formed to floating drum
Load is acted on regional stability state.
Further, the lower end at the annular canister central through hole is equipped with heave plate, the edge of the heave plate and the ring
The inner wall of shape cylinder is sealedly and fixedly connected.
Further, the bottom of the heave plate is equipped with several evenly arranged through-holes.
Further, the vias rate in the heave plate is 20~30%.
Further, the height of the annular canister be underwater mooring hose interface height and hose minimum bending radius it
It is 3.5~4.5m with, value.
Advantages of the present invention:
1. scantling draft and wet structure area are increased, to increase the additional mass and additional damping of structure；
2. reducing structural focus, increasing center of gravity at a distance from centre of buoyancy, to improve restoring moment；
3. using tension type anchoring system, mooring rigidity is improved to further decrease the dynamic response of floating drum.
Detailed description of the invention
Fig. 1 overall structure of the present invention.
Fig. 2 moored condition schematic diagram of the present invention.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
As shown in Figure 1, the present invention is based on the tension type anchor leg floating drums of traditional single-point unloading system comprising catenary suspension type continuous vulcanization anchor
Leg floating drum 1, the catenary suspension type continuous vulcanization anchor leg floating drum 1 include buoyancy mooring part 11, this hair can be guaranteed by being divided by buoyancy mooring portion 11
Bright rests on the water surface, and can carry out mooring operation to oil hose, and buoyancy mooring part 11 is cylindrical, floats
Damping ballast portion 12 is arranged at the bottom of power mooring part 11, and the damping ballast portion 12 includes being mounted on buoyancy mooring part 11
The annular canister 121 of bottom center, the inner cavity of the annular canister form ballast tank and act on to form ballast to floating drum with region
Stable state.
The present invention is also fully utilized by heaving plate technique, at the inner cavity keel of damping ballast portion 12, i.e. annular canister 121
Central through hole lower end is equipped with heave plate 122, and the edge of heave plate 122 and the inner wall of the annular canister 121 are sealedly and fixedly connected.No
Be same as Spar platform heave plate or deep draft semi-submersible platform heave plate: heave plate 122 of the invention is hung down using semiclosed
Plate is swung, the edge of heave plate 122 is connect with the inner wall of annular canister 121, and is equipped with several uniform arrangements in the bottom of 122 plate of heaving
Through-hole 123.Due to the semiclosed effect of heave plate 122, so that the intracavitary water body that annular canister 121 and heave plate 122 are formed
It can not freely be exchanged with external seawater.Therefore, heave plate 122 has dual heaving damping action, first is that intracavitary water
The damping action that body and external exchange of seawater generate；Second is that intracavitary water body and external exchange of seawater produce inner cavity top when being obstructed
Raw drag effect.In addition, heave plate 122 is by its specific position and characteristic, so that the intracavitary water body of annular canister 121 is with floating drum
Movement also have the function of that vertical (cross) swings damping.
In order to reach above-mentioned damping, the vias rate in heave plate 122 is 20~30%, since the present invention defines
Heave plate 122 effect and principle be different from existing heaving plate technique, therefore, influence of the percent opening to damping also with
And it is different.
About the height value of damping ballast portion 12, theoretically it is the bigger the better.But due to being present in underwater hose collision
The problem of, it therefore, should be determined according to the bending property of underwater hose, the interface height and hose minimum for the bottom hose that should fetch water are curved
The sum of bilge radius, currently, the hose connection height of common single-point floating drum is 2 meters, the minimum bending radius of hose is 2 meters, therefore,
The height for damping ballast portion 12 is 4 meters.
For the Hydrodynamic for further decreasing floating drum, present invention employs tension type anchoring systems, and the anchoring system is not
Only with the effect of contraction in horizontal plane, and the mooring effect with vertical direction.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment
Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
It is changes or modifications equivalent made by the essence of content according to the present invention, should be covered by the scope of protection of the present invention.
Claims (5)
1. the tension type anchor leg floating drum of single-point unloading system, including tension type anchor leg floating drum, the tension type anchor leg floating drum include
Buoyancy mooring part, which is characterized in that buoyancy mooring part is cylindrical, and damping is arranged at the bottom of buoyancy mooring part
Ballast portion, the damping ballast portion includes the annular canister being mounted at buoyancy mooring section bottom center, the annular canister
Inner cavity formed ballast tank to floating drum formed ballast act on so that floating drum tends towards stability state.
2. the tension type anchor leg floating drum of single-point unloading system according to claim 1, it is characterised in that: in the annular canister
The lower end of heart through hole is equipped with heave plate, and the edge of the heave plate and the inner wall of the annular canister are sealedly and fixedly connected.
3. the tension type anchor leg floating drum of single-point unloading system according to claim 2, it is characterised in that: the heave plate
Bottom is equipped with several evenly arranged through-holes.
4. the tension type anchor leg floating drum of single-point unloading system according to claim 2, it is characterised in that: in the heave plate
Vias rate be 20~30%.
5. the tension type anchor leg of single-point unloading system according to claim 1 pays floating drum, it is characterised in that: the annular canister
Height be underwater mooring hose interface height and the sum of hose minimum bending radius, value is 3.5~4.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016925.9A CN106828782B (en) | 2017-01-11 | 2017-01-11 | The tension type anchor leg floating drum of single-point unloading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016925.9A CN106828782B (en) | 2017-01-11 | 2017-01-11 | The tension type anchor leg floating drum of single-point unloading system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106828782A CN106828782A (en) | 2017-06-13 |
| CN106828782B true CN106828782B (en) | 2019-01-29 |
Family
ID=59118257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710016925.9A Expired - Fee Related CN106828782B (en) | 2017-01-11 | 2017-01-11 | The tension type anchor leg floating drum of single-point unloading system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106828782B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931226B (en) * | 2017-12-15 | 2021-03-23 | 上海海事大学 | Vertical resistance-increasing combined type offshore wind turbine supporting structure system |
| WO2020259638A1 (en) * | 2019-06-25 | 2020-12-30 | 合肥浔光科技有限责任公司 | Main float and water photovoltaic power station |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3641602A (en) * | 1969-09-09 | 1972-02-15 | Exxon Research Engineering Co | Single anchor leg single point mooring system |
| US3922992A (en) * | 1974-05-29 | 1975-12-02 | Texaco Inc | Single point vessel mooring system |
| US5651709A (en) * | 1995-11-09 | 1997-07-29 | Nortrans Engineering Group Pte Ltd. | Cantenary anchor leg mooring buoy |
| CN201580543U (en) * | 2009-12-02 | 2010-09-15 | 中国海洋大学 | Pipe bundle type stand column platform |
| CN202098536U (en) * | 2011-04-21 | 2012-01-04 | 天津市海王星海上工程技术有限公司 | Flexible buoy type mooring system with single anchor leg |
| CN105416521B (en) * | 2015-12-14 | 2017-06-23 | 江苏科技大学 | Platform moon pool damping device |
| CN205396440U (en) * | 2016-03-02 | 2016-07-27 | 中国港湾工程有限责任公司 | Single point moored system |
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2017
- 2017-01-11 CN CN201710016925.9A patent/CN106828782B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN106828782A (en) | 2017-06-13 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Huang Weiping Inventor after: Chang Shuang Inventor after: Guan Jian Inventor after: Fu Xuepeng Inventor before: Huang Weiping Inventor before: Chang Shuang Inventor before: Fu Xuepeng |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190129 Termination date: 20200111 |