CN204846279U - A fairing for inside moon pool - Google Patents
A fairing for inside moon pool Download PDFInfo
- Publication number
- CN204846279U CN204846279U CN201520584176.6U CN201520584176U CN204846279U CN 204846279 U CN204846279 U CN 204846279U CN 201520584176 U CN201520584176 U CN 201520584176U CN 204846279 U CN204846279 U CN 204846279U
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- CN
- China
- Prior art keywords
- moon pool
- pool structure
- triangle
- length
- wedge
- 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.)
- Withdrawn - After Issue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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- Earth Drilling (AREA)
Abstract
The utility model provides a fairing for inside moon pool, including the vertical through open -ended moon pool structure of setting on drill ship ship midships section divides the place ahead of moon pool structure is provided with the tilting wedge and leads stream block, and the perpendicular that stream block was led to the tilting wedge coincides with the forward position of moon pool structure, the rear of moon pool structure is provided with the wedge grooving, just the perpendicular of wedge grooving and the coincidence of the back -porch of moon pool structure, be provided with two triangle -shaped on the back -porch of moon pool structure and hinder and swing the device, and two triangle -shaped hinder and swing the device and set up the top at the perpendicular of wedge grooving one on the other. The utility model discloses the resistance of drill ship can be reduced, the economic nature of drill ship at the navigation in -process is improved.
Description
Technical field
The utility model relates to a kind of fairing, particularly relates to a kind of fairing for drilling ship moon pool inside, belongs to Naval Architecture and Ocean Engineering field.
Background technology
With the consumption of the landing field energy, the sight of people starts to turn to ocean from land.Exploitation Marine oil and gas resource, needs to carry out exploring, the work of drilling well and production.Wherein, drilling ship plays an important role in marine oil and gas drilling well work.
Drilling ship is a kind of ship type floating offshore drilling platform, and navigation mode mainly contains self-propulsion type and towage formula two kinds, can assemble the equipment needed for multiple drilling well.With conventional ship type unlike, drilling ship generally has a larger vertical through opening near ship midship, and this structure is referred to as moon pool structure, can produce many adverse influences to the structure of drilling ship, motion with oneself aspects such as resistance of navigating of migration.The vibration of moon pool inner fluid mainly contains two kinds of forms, and a kind of is along vertical the moving of hull, is referred to as piston movement; Another kind is moving along captain direction, is referred to as sloshing motion.Moon pool inner fluid is in the process of motion, first whirlpool is produced at the forward position place of moon pool, this whirlpool develops gradually, and move towards the Hou Yanchu of moon pool, time after arriving moon pool along place, will form the large whirlpool that occupies moon pool inner most space, the forward position of moon pool continues to produce whirlpool afterwards, and constantly repeats this process.
With regard to resistance, have resistance during moon pool can obviously be greater than without the resistance that certainly navigates during moon pool, this is caused by the additional damping that produces due to the vibration of moon pool inner fluid.Analyze from energisation mode, cause the liquid motion in moon pool to mainly contain two kinds of reasons.The first, when drilling ship is at quiet underwater exercise, the motion of fluid in moon pool, fluid, through moon pool bottom, due to the unexpected interruption of hull structure, makes fluid flow towards moon pool internal direction, and with the generation of whirlpool, again due to the existence of whirlpool, exacerbate the fugitiveness of moon pool inner fluid flowing, and create larger additional resistance.The second, when drilling ship is in Motion Waves, the induction that the fluid in moon pool is subject to wave produces motion.Corresponding with the reason that initiation moon pool inner fluid vibrates, the method reducing drilling ship resistance mainly contains two kinds.The principle of first method mainly, by changing and guiding the state of kinematic motion of moon pool mouth place fluid to reach the effect of drag reduction.The principle of second method, mainly by installing the device of plate class in moon pool additional, increasing the damping of flowing, hindering the motion of fluid, thus reach the object of drag reduction.
Summary of the invention
The purpose of this utility model is the resistance in order to reduce drilling ship, improves the economy of drilling ship in navigation process and provides a kind of fairing for drilling ship moon pool inside.
The purpose of this utility model is achieved in that the moon pool structure comprising and be arranged on the vertical through opening that drilling ship ship midships section divides, tilting wedge-shape diversion block is provided with in the front of described moon pool structure, the vertical surface of tilting wedge-shape diversion block overlaps with the forward position of moon pool structure, the rear of described moon pool structure is provided with wedge shaped cuts, and the vertical surface of described wedge shaped cuts overlaps with the rear edge of moon pool structure, the rear edge of described moon pool structure is provided with two triangle form drags and swings device, and two triangle form drags swing the top that device is arranged on the vertical surface of wedge shaped cuts one on the other.
The utility model also comprises some architectural features like this:
1. the key groove of tilting wedge-shape diversion block described in is the acute angle of 8 ° to 12 °, during the length of tilting wedge-shape diversion block moon pool structure length 15% to 25%, the width of tilting wedge-shape diversion block is identical with the width of moon pool structure.
2. the key groove of wedge shaped cuts described in is the acute angle of 8 ° to 12 °, during the length of wedge shaped cuts moon pool structure length 15% to 25%, the width of wedge shaped cuts is identical with the width of moon pool structure.
3. it is isosceles right triangle that triangle form drag described in swings the cross section of device, and the length of side of isosceles right triangle is 7% to 10% of the length of moon pool structure, the width that triangle form drag swings device is identical with the width of moon pool structure, the distance that the triangle form drag of below is swung along intersection after the level right angle limit of device and wedge shaped cuts and moon pool structure is 0% to 50% of the length of side of isosceles right triangle, the distance that the triangle form drag on the triangle form drag level right angle limit and below of swinging device of top swings the level right angle limit of device is 125% to 175% of the length of side of isosceles right triangle.
Compared with prior art, the beneficial effects of the utility model are: 1, guided the fluid near moon pool to flow by tilting wedge-shape diversion block and wedge shaped cuts actv., efficiently reduce the whirlpool at moon pool forward position place to the impact of moon pool inner fluid.The flat limit of 2, swinging device bottom by triangle form drag hinders the flowing of moon pool internal flow effectively, the hypotenuse on top can when moon pool internal liquid level changes, fluid can flow back into initial position smoothly, reaches the effect reducing drilling ship resistance with the principle increasing flow damping.3, lower resistance swings device installation site above wedge shaped cuts, can as the extension of wedge shaped cuts, increases the effect guided, and upper resistance is swung device and is arranged on the fluctuation that top that lower resistance swings device effectively can hinder fluid, and drilling ship resistance is reduced.4, verified by the drag-reduction effect of method to this kind of fairing of CFD, analog result display with do not install compared with this kind of fairing, the resistance installing the drilling ship of fairing reduces 4.24%.5, this design is a kind of passive-type fairing, and the normal operation and the equipment that do not affect drilling ship are thrown in, simple and convenient, is a kind of drag reduction scheme of practicality.
Accompanying drawing explanation
Fig. 1 is elevation profile of the present utility model schematic side view;
Fig. 2 is upward view of the present utility model;
Fig. 3 is the structural representation of tilting wedge-shape diversion block of the present utility model;
Fig. 4 is the structural representation (device is swung in upper triangular resistance) that triangle form drag of the present utility model swings device;
Fig. 5 is the structural representation (device is swung in lower triangular resistance) that triangle form drag of the present utility model swings device.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail.
Composition graphs 1 to Fig. 5, the utility model relates to the fairing of drilling ship in a kind of moon pool, swings device and a wedge shaped cuts forms by a tilting wedge-shape diversion block, two triangle form drags, according to the state of kinematic motion of fluid in moon pool, proposes the device of drag reduction.First the front of the installation site of tilting wedge-shape diversion block moon pool bottom drilling ship, the square edge of baffle vertical direction overlaps with the forward position of moon pool, by the direction that the Angulation changes fluid of device flows, guide the flowing of moon pool surrounding fluid, the eddy current reducing moon pool outside, on the impact of moon pool internal flow, reaches drag-reduction effect.But the existence of this tilting wedge-shape diversion block also can be with and be served reverse effect, the flowing of meeting convection cell produces and hinders effect, this obstruction effect can cause the increase of drilling ship resistance, when inhibition is greater than guiding function, the effect of drag reduction can be lost, therefore get a less angle (8 ° ~ 12 °), length is 15% ~ 25% of moon pool length, and width and moon pool are with wide.Arrange that the thought of wedge shaped cuts is the flowing by guiding fluid after moon pool along the angled grooving in place, make a part of fluid through the guiding of grooving to the flows outside of moon pool, reduce moon pool external fluid to the impact of moon pool internal flow, reach drag-reduction effect, angle is 8 ° ~ 12 °, length is 15% ~ 25% of moon pool length, and width and moon pool are with wide.Two triangle form drags swing the Hou Yanchu that device is arranged in moon pool, upper resistance is divided into swing device and device is swung in lower resistance by different from installation site, the distance that device horizontal direction square edge and limit, wedge shaped cuts moon pool boundary are swung in lower resistance is hinder to swing 0% ~ 25% of device square edge size, upper resistance swing device horizontal direction square edge apart from lower resistance swing device horizontal direction square edge distance for resistance swing 125% ~ 175% of device square edge size.The measure-alike of device is swung in two resistances, and angle is 45 °, and length is 7% ~ 10% of moon pool length with highly equal, and width and moon pool are with wide.Arrange that the thinking of triangle retaining means mainly stops the fluid of moon pool inside to flow by the flat limit of triangle damping block bottom, and the hypotenuse on its top is in order to when moon pool internal liquid level changes, fluid can flow back into initial position smoothly.Lower resistance swings the installation site of device above wedge shaped cuts, can regard the extension to the chamfering of edge excision after moon pool as, and that is lower resistance swings device except having the effect of the motion hindering fluid, also has the effect of guiding.The installation site that device is swung in upper resistance is swung above device in lower resistance, mainly by hindering the flowing of fluid to reach the effect reducing drilling ship resistance.
In the flowing of reality, a part of fluid swings device through tilting wedge-shape diversion block, wedge shaped cuts and lower triangle form drag, and (guiding is flowed out the scope of moon pool, is not produced excessive impact to moon pool inner fluid.Another part fluid not directed going out, continue to moon pool internal flow, and drive the fluid in moon pool to move, swing through upper triangle form drag the obstruction that device and lower triangle form drag swing device, reduce the motion amplitude of fluid, thus reach the effect reducing drilling ship resistance.
Claims (5)
1. the fairing for drilling ship moon pool inside, comprise the moon pool structure being arranged on the vertical through opening that drilling ship ship midships section divides, it is characterized in that: be provided with tilting wedge-shape diversion block in the front of described moon pool structure, the vertical surface of tilting wedge-shape diversion block overlaps with the forward position of moon pool structure, the rear of described moon pool structure is provided with wedge shaped cuts, and the vertical surface of described wedge shaped cuts overlaps with the rear edge of moon pool structure, the rear edge of described moon pool structure is provided with two triangle form drags and swings device, and two triangle form drags swing the top that device is arranged on the vertical surface of wedge shaped cuts one on the other.
2. a kind of fairing for drilling ship moon pool inside according to claim 1, it is characterized in that: the key groove of described tilting wedge-shape diversion block is the acute angle of 8 ° to 12 °, during the length of tilting wedge-shape diversion block moon pool structure length 15% to 25%, the width of tilting wedge-shape diversion block is identical with the width of moon pool structure.
3. a kind of fairing for drilling ship moon pool inside according to claim 1 and 2, it is characterized in that: the key groove of described wedge shaped cuts is the acute angle of 8 ° to 12 °, during the length of wedge shaped cuts moon pool structure length 15% to 25%, the width of wedge shaped cuts is identical with the width of moon pool structure.
4. a kind of fairing for drilling ship moon pool inside according to claim 1 and 2, it is characterized in that: the cross section that described triangle form drag swings device is isosceles right triangle, and the length of side of isosceles right triangle is 7% to 10% of the length of moon pool structure, the width that triangle form drag swings device is identical with the width of moon pool structure, the distance that the triangle form drag of below is swung along intersection after the level right angle limit of device and wedge shaped cuts and moon pool structure is 0% to 50% of the length of side of isosceles right triangle, the distance that the triangle form drag on the triangle form drag level right angle limit and below of swinging device of top swings the level right angle limit of device is 125% to 175% of the length of side of isosceles right triangle.
5. a kind of fairing for drilling ship moon pool inside according to claim 3, it is characterized in that: the cross section that described triangle form drag swings device is isosceles right triangle, and the length of side of isosceles right triangle is 7% to 10% of the length of moon pool structure, the width that triangle form drag swings device is identical with the width of moon pool structure, the distance that the triangle form drag of below is swung along intersection after the level right angle limit of device and wedge shaped cuts and moon pool structure is 0% to 50% of the length of side of isosceles right triangle, the distance that the triangle form drag on the triangle form drag level right angle limit and below of swinging device of top swings the level right angle limit of device is 125% to 175% of the length of side of isosceles right triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520584176.6U CN204846279U (en) | 2015-08-06 | 2015-08-06 | A fairing for inside moon pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520584176.6U CN204846279U (en) | 2015-08-06 | 2015-08-06 | A fairing for inside moon pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204846279U true CN204846279U (en) | 2015-12-09 |
Family
ID=54736854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520584176.6U Withdrawn - After Issue CN204846279U (en) | 2015-08-06 | 2015-08-06 | A fairing for inside moon pool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204846279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105015698A (en) * | 2015-08-06 | 2015-11-04 | 哈尔滨工程大学 | Damping device for interior of moon pool of drilling ship |
-
2015
- 2015-08-06 CN CN201520584176.6U patent/CN204846279U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105015698A (en) * | 2015-08-06 | 2015-11-04 | 哈尔滨工程大学 | Damping device for interior of moon pool of drilling ship |
| CN105015698B (en) * | 2015-08-06 | 2018-02-09 | 哈尔滨工程大学 | A kind of damping device for inside drill ship moon pool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151209 Effective date of abandoning: 20180209 |