CN106828782A - 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
- CN106828782A CN106828782A CN201710016925.9A CN201710016925A CN106828782A CN 106828782 A CN106828782 A CN 106828782A CN 201710016925 A CN201710016925 A CN 201710016925A CN 106828782 A CN106828782 A CN 106828782A
- 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 single-point unloading system tension type anchor leg floating drum.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, the buoyancy mooring part is in cylinder, damping ballast portion is arranged at the bottom of the buoyancy mooring part, and the damping ballast portion includes the annular canister and ballast tank installed in buoyancy mooring section bottom center.Invention increases scantling draft and wet structure area, so as 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 single-point unloading system tension type anchor
Leg floating drum.
Background technology
Single-point unloading system is the emptying method of offshore oil transport conventional at present, and it instead of traditional harbour emptying
Mode, its advantage is：Can build in any desired offshore position, not limited by navigation channel and the depth of water.It has the disadvantage：Due to floating
The size of cylinder is smaller, and the oil hose that its motion often results in floating drum lower end under the effect of marine environment load is in motion process
Larger curvature is produced, particularly in the marine site that tidal range is larger, its maximum dynamic curvature is more than 1.2, and current hose technology
0.5 curvature allowable can only be accomplished, so as to cause excessive hose to damage, the usage cycles of flexible pipe are greatly reduced, in engineering not
The method of frequent (about one year cycle) replacing flexible pipe must not be used to keep the normal operation of system.
Because oil hose to be ensured is under the conditions of extreme high water level and maximum wave height, its length meets requirement.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 its curvature is maximum quiet
State curvature.In the marine site that tidal range is larger, maximum static state curvature has reached or close to the curvature allowable of flexible pipe, therefore, the water of floating drum
Just can the dynamic curvature as flexible pipe meet the key of requirement to power performance.At present, floating drum has two kinds of structure-circles of form
Tubular and square, two kinds of structures use catenary anchor leg mooring (CALM), because floating drum size is smaller, shallower draft (about 2 meters),
Motion amplitude is larger in the presence of wind, wave, stream, therefore, it is necessary to meet wanting for catenary mooring system using anchor chain more long
Ask, i.e., anchor is not acted on by vertical force, its anchor point is far longer than the 3 of conventional catenary mooring system with the horizontal range of floating drum
Times depth of water, has exceeded 5 times of depth of waters.
Due to floating drum top and be not equipped with jumbo, 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 meeting.Additionally, limited by underwater hose curvature, current spar structures are not yet
Hydrodynamic can be reduced by increasing drinking water.Importantly, because single-point unloading system generally build deep water in less than 50
The offshore position of rice, it is impossible to which the deep drinking water using the Spar platforms in offshore platform and marine wind electric field foundation structure is general
Thought-center of gravity is less than centre of buoyancy.So current single-point floating drum still uses cylinder or direction structure, flexible pipe is not solved in early days all the time
The problem of damage.
Existing single-point unloading system oil hose is more than flexible pipe under the conditions of most of design conditions in dynamic curvature formula
Curvature allowable, so as to cause the early damage of flexible pipe, causes the replacement cycle of flexible pipe to greatly shorten, domestic only several single-points
Unloading system is required for changing flexible pipe every year.
The content of the invention
The technical problem to be solved in the present invention is how to overcome the deficiencies in the prior art, there is provided the tensioning of single-point unloading system
Formula anchor leg floating drum.
The technical scheme that uses to achieve the above object of the present invention is：The tension type anchor leg floating drum of single-point unloading system, bag
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 characterized in that, the buoyancy
There is damping ballast portion mooring part in cylinder, the bottom of the buoyancy mooring part, and the damping ballast portion includes peace
Mounted in the annular canister of buoyancy mooring section bottom center, the inner chamber of the annular canister forms ballast tank and is used to form pressure to floating drum
Load is acted on regional stability state.
Further, the lower end at the annular canister central through hole is provided with heave plate, the edge of the heave plate and the ring
The inner wall sealing of shape cylinder is fixedly connected.
Further, the bottom of the heave plate is provided with the through hole of some uniform arrangements.
Further, the vias rate in the heave plate is 20~30%.
Further, the height of the annular canister be mooring flexible pipe under water interface height and flexible pipe minimum bending radius it
With value is 3.5~4.5m.
Advantages of the present invention：
1. scantling draft and wet structure area are increased, so as to increase the additional mass and additional damping of structure；
2. reduce structural focus, increase the distance of center of gravity and centre of buoyancy, so as to improve restoring moment；
3. tension type anchoring system is employed, improves mooring rigidity further to reduce the dynamic response of floating drum.
Brief description of the drawings
Fig. 1 overall structure diagrams of the present invention.
Fig. 2 moored condition schematic diagrames of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
As shown in figure 1, tension type anchor leg floating drum of the present invention based on traditional single-point unloading system, it includes catenary suspension type continuous vulcanization anchor
Leg floating drum 1, the catenary suspension type continuous vulcanization anchor leg floating drum 1 includes buoyancy mooring part 11, and by buoyancy mooring portion, 11 points ensure that this hair
Bright is rested on the water surface, and mooring operation can be carried out to oil hose, and the buoyancy mooring part 11 is floated in cylinder
Damping ballast portion 12 is arranged at the bottom of power mooring part 11, and the damping ballast portion 12 includes being arranged on buoyancy mooring part 11
Annular canister 121 at bottom centre, the inner chamber of the annular canister forms ballast tank and is used to form floating drum ballast effect with region
Stable state.
The present invention is also fully utilized by heaving plate technique, at the inner chamber keel of damping ballast portion 12, i.e. annular canister 121
Central through hole lower end is provided with heave plate 122, and the edge of heave plate 122 is fixedly connected with the inner wall sealing of the annular canister 121.No
Be same as Spar platforms heave plate or deep draft semi-submersible platform heave plate is：Heave plate of the invention 122 is hung down using semiclosed
Plate is swung, the edge of heave plate 122 is connected with the inwall of annular canister 121, and is provided with some uniform arrangements in the bottom of the plate of heaving 122
Through hole 123.Due to the semiclosed effect of heave plate 122 so that the water body in chamber that annular canister 121 is formed with heave plate 122
Can not freely be exchanged with outside seawater.Therefore, heave plate 122 has dual heaving damping action, and one is the water in chamber
The damping action that body is produced with outside exchange of seawater；Two are, inner cavity top is produced when water body is obstructed with outside exchange of seawater in chamber
Raw drag effect.Additionally, heave plate 122 is by its specific position and characteristic so that water body is with floating drum in the chamber of annular canister 121
Motion also there is vertical (horizontal stroke) to swing the effect of damping.
In order to reach above-mentioned damping, the vias rate in heave plate 122 is 20~30%, because the present invention is defined
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.
Height value on damping ballast portion 12, is the bigger the better in theory.But due to being present in underwater hose collision
Problem, therefore, should be determined according to the bending property of underwater hose, the interface of the bottom hose that should fetch water height is curved with flexible pipe minimum
Bilge radius sum, at present, the hose connection for commonly using single-point floating drum is highly 2 meters, and the minimum bending radius of flexible pipe is 2 meters, therefore,
The height for damping ballast portion 12 is 4 meters.
Further to reduce the Hydrodynamic of floating drum, present invention employs tension type anchoring system, the anchoring system is not
Only there is the effect of contraction in horizontal plane, and the effect of the mooring with vertical direction.
Above-described embodiment simply to illustrate that technology design of the invention and feature, the purpose is to be to allow in the art
Those of ordinary skill will appreciate that present disclosure and implement according to this that it is not intended to limit the scope of the present invention.It is all
It is the equivalent change or modification according to done by the essence of present invention, should all covers within the scope 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 includes
Buoyancy mooring part, it is characterised in that in cylinder, damping is arranged at the bottom of the buoyancy mooring part for the buoyancy mooring part
Ballast portion, the damping ballast portion includes the annular canister installed in buoyancy mooring section bottom center, the annular canister
Inner chamber formed ballast tank be used to floating drum formed ballast act on regional 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 provided with heave plate, and the edge of the heave plate is fixedly connected with the inner wall sealing of the annular canister.
3. the tension type anchor leg floating drum of single-point unloading system according to claim 1, it is characterised in that：The heave plate
Bottom is provided with the through hole of some uniform arrangements.
4. the tension type anchor leg floating drum of single-point unloading system according to claim 1, 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 mooring flexible pipe under water interface height and flexible pipe minimum bending radius sum, value be 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 true CN106828782A (en) | 2017-06-13 |
| CN106828782B 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 |
|---|---|
| CN (1) | CN106828782B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931226A (en) * | 2017-12-15 | 2019-06-25 | 上海海事大学 | A kind of vertical resistance-enlarging-type combined type marine windmill Bracing Systems |
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1959622A1 (en) * | 1969-09-09 | 1971-03-11 | Exxon Research Engineering Co | One-point anchor 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 |
| CN105416521A (en) * | 2015-12-14 | 2016-03-23 | 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 |
-
2017
- 2017-01-11 CN CN201710016925.9A patent/CN106828782B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1959622A1 (en) * | 1969-09-09 | 1971-03-11 | Exxon Research Engineering Co | One-point anchor 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 |
| CN105416521A (en) * | 2015-12-14 | 2016-03-23 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931226A (en) * | 2017-12-15 | 2019-06-25 | 上海海事大学 | A kind of vertical resistance-enlarging-type combined type marine windmill Bracing Systems |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106828782B (en) | 2019-01-29 |
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| PB01 | Publication | ||
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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 |