CN201635671U - Passive flow control device capable of suppressing vortex-induced vibration of long and thin flexible riser - Google Patents
Passive flow control device capable of suppressing vortex-induced vibration of long and thin flexible riser Download PDFInfo
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- CN201635671U CN201635671U CN2009202470186U CN200920247018U CN201635671U CN 201635671 U CN201635671 U CN 201635671U CN 2009202470186 U CN2009202470186 U CN 2009202470186U CN 200920247018 U CN200920247018 U CN 200920247018U CN 201635671 U CN201635671 U CN 201635671U
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- standpipe
- induced vibration
- riser
- vortex
- flow control
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Abstract
The utility model relates to a passive flow control device capable of suppressing the vortex-induced vibration of a long and thin flexible riser, which is characterized by comprising four control levers and a plurality of fixing devices, wherein all the four control levers are arranged outside a riser and form an angle of 90 degrees therewith, and the fixing devices are used for fixing the riser and the control levers, and are arranged along the length direction of the riser and the control levers at equal interval; and the control levers can be not only the existing auxiliary pipelines along the periphery of the riser but also the added rod pieces around the riser. The coverage of the existing auxiliary pipelines outside the riser is 100%, the added control levers are discontinuously distributed along the axis direction of the riser at equal interval, and the total coverage is 40% of the length of the riser. The distance from the four levers to the circle center of the riser can be adjusted according to the practical condition so as to achieve the optimal suppressing effect. Compared with the vortex-induced vibration suppressing device of a deep sea riser used in the past, the utility model is more safe and reliable, has wide application scope and better vortex-induced vibration suppressing effect, simultaneously, can effectively save the investment, and can be widely used for suppressing and reducing the engineering damage to the long and thin deep sea flexible riser by the vortex-induced vibration.
Description
Technical field
The utility model relates to a kind of passive flow control device, particularly about a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe.
Background technology
At present, the deep-sea has progressively been moved towards in the exploitation of marine oil and gas resource, under the marine environment of deep-sea, the depth of water often surpasses several kms, ocean water such as ocean current and wave dynamic environment is also complicated more, the riser systems slenderness ratio that connects subsea wellheads and upper brace is very big, and structure has tangible flexible characteristic.When ocean current is flowed through elongate cylinder tee section standpipe structure, tend to alternately form vortex shedding in the standpipe both sides, standpipe is produced the alternation active force of one-period, so make standpipe with flow to vertical direction on significantly oscillation crosswise takes place significantly; Simultaneously, the vibration of standpipe can exert an influence by stream field again conversely, and the aggravation current are to the damaging effect of structure.When the intrinsic frequency of vortex shedding frequency and standpipe structure relatively near the time, the shedding frequence of whirlpool might be caught by the excited vibrational frequency of standpipe, and " locking " phenomenon takes place, and causes the judder of structure, form and flow the vortex-induced vibration that is coupled admittedly, the fatigue failure of aggravation standpipe.When vortex-induced vibration takes place, except meeting has tangible oscillation crosswise, standpipe also can streamwise generation following current to crooked and small size dither, though following current to vibration amplitude than the often little order of magnitude of oscillation crosswise, but its vibration frequency is higher, the standpipe large deformation bending that the power of current drag is simultaneously caused makes standpipe be in high-stress state always, and these also all can aggravate the fatigue failure of standpipe.In a single day deep-sea slender compliant riser system destroys, maintenance difficulty is big, and the expense height not only can make the exploitation of marine oil and gas resource stand enormous economic loss, also can cause serious marine environmental pollution simultaneously.
Current, in the deep-sea oil gas resource exploitation, use vortex-induced vibration braking measure more widely to mainly contain barber-pole stripes, radome fairing and control lever etc.Wherein, barber-pole stripes and radome fairing all need extra manufacturing, and cost is than higher, and practical project operation and installation technology is more complicated also.And the control lever cost is relatively cheap, and construction, install also comparatively convenient.Chinese scholars has obtained many achievements in research aspect the control lever FLOW CONTROL utilizing, for example, (2008) such as Ming Zhao have studied the field characteristic that streams at main cylinder (standpipe) small column of arranged around (control lever), and master and slave cylinder spacing and relative angle have been discussed to the stressed influence of main cylinder; (2009) such as Md.Mahbub Alam etc. (2007) and Hyun Sik Yoon have studied two identical hydrodynamic characterisitics of (side-by-side) cylinders side by side in the uniform flow field, and (2006) such as Sangil Kim etc. (2009) and Jian Deng have then studied the bicylindrical stressed problem of tandem (tandem).But above these representative research work are primarily aimed at the suffered drag force of cylinder, and less relatively at the achievement in research that how to reduce active lateral force in standpipe structure generation vortex-induced vibration, rarely have especially about the achievement of vortex-induced vibration braking measure aspect to relate to.Recently, Dalian University of Technology's seashore and offshore engineering National Key Laboratory have carried out and adopt three control levers to carry out the experimental study work of riser vortex excited vibration inhibition aspect, and applied for that name is called the Chinese patent of " a kind of inhibition method and device of vortex-induced vibration by underwater pipeline ", its application number is 200810225715.1.This patent is that three control levers are arranged in around the riser model by the circumference five equilibrium, guarantee the angle between flow path direction and the control lever can be above 60 °, make that there is one to two control lever in total energy in the burble point upstream and downstream flow field in boundary layer, come flow path direction can both play certain vortex-induced vibration to suppress effect to different like this.But three above-mentioned attachment tube inhibition methods exist the situation of existing attached pipeline just to be suitable for around being primarily aimed at general drilling riser pipe.For production riser more widely in the marine oil and gas industry, there is not attached pipeline around it, at this moment, declare method in the patent according to this, attached control lever is installed in requirement in the length range around the standpipe, this is that construction costs or difficulty of construction are all bigger for the practical project problem.
Summary of the invention
At the problems referred to above, the purpose of this utility model provide a kind of safe and reliable, the scope of application is more extensive, vortex-induced vibration suppresses better effects if, the passive flow control device of the inhibition vortex induced vibration of slender flexible standpipe that can effectively reduce investment outlay again simultaneously.
For achieving the above object, the utility model is taked following technical scheme: a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe, it is characterized in that: it comprises four control levers and a plurality of described standpipes and four fastening devicess that control lever is used of fixing that are arranged on 90 ° at the circumferential interval of standpipe, and described fastening devices uniformly-spaced is provided with along the length direction of described standpipe and control lever.
Described control lever is the existing attached pipeline around the described standpipe.
When around described standpipe, not having attached pipeline, described control lever suppresses bar for the isometric vortex-induced vibration of uniformly-spaced additionally setting up along described standpipe length direction, and described vortex-induced vibration to suppress bar be 40% of described standpipe total length along the length summation of described standpipe length direction.
Described fastening devices comprises the center hole that is divided into two parts and uses by bolted semicircle block, a fixing described standpipe, radially offers the four fixing rectangular slots used of control lever, the side of the described fastening devices that each described rectangular slot is corresponding with it is communicated with, and each end face that is communicated with described rectangular slot is provided with one and withstands the bolt hole of described control lever by bolt.
Each described semicircle block be symmetrically arranged with an ear clip that has a screw hole respectively in conjunction with end face both sides upper and lower, the described ear clip of symmetry links into an integrated entity by the bolt that is arranged in the described screw hole.
In described rectangular slot, be provided with and regulate the pad that spacing is used between described control lever and standpipe.
Described fastening devices adopts aluminum to make, and offers a plurality of holes on described fastening devices.
Offer some sulculuses on the side of described center hole.
The utility model is owing to take above technical scheme, it has the following advantages: 1, since the utility model standpipe circumferentially with uniformly-spaced 90 ° arrange four control levers, therefore can guarantee that the flow path direction that comes of current is only had 45 ° dependence, having avoided in the past, single control rod has the shortcoming of obvious directional sensitivity, can also avoid simultaneously when actual ocean current comes flow path direction that bigger change takes place, single control rod even the problem that may aggravate the riser vortex excited vibration, therefore on the inhibition effect of vortex-induced vibration, adopt present equal angles to arrange that the scheme of four control levers is more safe and reliable.2, because the utility model can make full use of attached pipeline existing around the drilling riser pipe in the actual deep-sea drilling engineering as control lever, therefore can reduce engineering cost greatly.3, do not exist near the production riser of deep-sea under the situation of attached pipeline owing to the utility model, can suppress vortex-induced vibration by additionally set up vortex-induced vibration inhibition bar in the standpipe periphery, the vortex-induced vibration of setting up suppresses bar only to be needed outside standpipe according to certain regularity of distribution, length overall reaches 40% of person in charge's length can obtain good vortex-induced vibration inhibition effect, the cost of therefore reducing investment outlay.4, since the utility model taken into full account the control lever diameter and be responsible for the influence of spacing to vortex-induced vibration in the different in flow rate scope, therefore can in bigger flox condition scope, play good vortex-induced vibration and suppress effect.5, because four control lever equal angles that the utility model adopts are arranged in around the standpipe, therefore can in to a certain degree, increase the bulk strength of standpipe structure, improve structural safety.6, because the utility model is being provided with a plurality of fastening devicess along the standpipe length direction according to certain intervals, the fastening devices that is adopted comprises the bolted semicircle block of two parts, a center hole, four rectangular slots and bolt hole, therefore control lever being fixed in the process of deep-sea standpipe only needs the circular block of two halves is pressed abd fixed on the standpipe surface, simultaneously control lever is penetrated in the rectangular slot, utilizing bolt passing through bolt hole that the control lever extruding is fixed in the rectangular slot again gets final product, therefore installation, fixing, unloading process convenience are convenient to engineering construction.7, since the utility model each semicircle block be provided with two ear clips that have a screw hole in conjunction with the end face bilateral symmetry, therefore further facilitated installation and removal.8, because the utility model is provided with pad in rectangular slot, the therefore spacing between lever for adjusting oil and the standpipe neatly.9, because the utility model fastening devices adopts aluminum to make, on fastening devices, offer a plurality of holes, so fastening devices is in light weight, can obviously not change the local stiffness condition of structure.10, owing to also offer some sulculuses on the side of center hole of the present utility model, therefore after standpipe is inserted in fastening devices, can in sulculus, insert high fluff material, be beneficial to the solid and reliable of standpipe.In sum, the utility model is safe and reliable, the scope of application is extensive, vortex-induced vibration suppresses that effect is good, construction costs is cheap, can be widely used in to suppress and reduce riser vortex excited vibration engineering harm in the deep-sea oil gas resource exploitation.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is the general illustration of the control lever of 40% coverage scale in the utility model
Fig. 3 is the structural representation of the fastening devices of control lever in the utility model
Fig. 4 is the structural representation of fastening devices 1/2 part of control lever in the utility model
Fig. 5 is the front view of Fig. 3
Fig. 6 is the lateral view of Fig. 3
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1 and Figure 2, the utility model comprises four control levers 2 that are arranged on 90 ° at standpipe 1 circumferential interval, and the benefit of She Zhiing is like this: the first, can make full use of and be responsible for existing attached pipeline on every side in the petroleum production engineering of actual deep-sea; The second, the equal angles distribution mode of four attachment tubes can make riser systems that the compliance of incoming flow angle is obviously strengthened, and having avoided in the past, single control rod has the shortcoming of obvious directional sensitivity; Three, three control lever schemes relatively before, the dependence of coming flow path direction to have 60 ° to current further is reduced to 45 ° (effect is better under the more situation of attached pipeline), and has further considered the convenience of construction and the safety in the operation aspect the mounting process of attached pipeline and method.
Shown in Fig. 2～6, every a segment distance one fastening devices 3 is set in standpipe 1 upper edge length of tube direction, it is one to be made into by aluminum and to form, it is used for four control levers 2 are fixedly secured a distance outside standpipe 1.Standpipe 1 can be drilling water-separation pipe or production riser, control lever 2 be the satisfactory existing attached pipeline (such as: the drilling well attached pipeline that refluxes) around the standpipe 1 or additionally set up be specifically designed to the rod member (hereinafter referred " vortex-induced vibration inhibition bar ") that suppresses vortex-induced vibration.When control lever 2 was existing attached pipeline, the length of control lever 2 was the total length of standpipe 1, and promptly coverage scale reaches 100%.Do not exist under the situation of attached pipeline around standpipe 1, control lever 2 suppresses bar for four isometric vortex-induced vibrations additionally setting up, and vortex-induced vibration inhibition bar uniformly-spaced is provided with along standpipe 1 length direction.Vortex-induced vibration suppresses bar not to be needed to arrange along standpipe 1 total length, reaches 40% of standpipe 1 total length as long as each section vortex-induced vibration suppresses bar along the length summation of standpipe 1 length direction, and promptly coverage scale is 40% can obtain to suppress preferably effect.Concrete mode is as follows: suppose that actual riser 1 length overall is L, can be divided into n (n=1,2,3 ...) section, the length of each section is L/n; The length that every vortex-induced vibration suppresses bar is h, every group of four vortex-induced vibration is suppressed bar be arranged in the outside of standpipe 1 according to equally spaced form segmentation, and guarantee mh/L=40%, and wherein m is the vortex-induced vibration actual arrangement hop count that suppresses bar (m＜n).Suppressing bar for every section vortex-induced vibration of setting up still adopts fastening devices 3 to be fixed on the standpipe 1.
Fastening devices 3 comprises that two parts pass through bolted semicircle block 31, each semicircle block 31 be provided with two ear clips 4 in conjunction with the end face bilateral symmetry, bolt is combined the circular block 31 of two halves by the screw hole on the ear clip 45.The center of fastening devices 3 is provided with a circular hole 6, the diameter of this circular hole and standpipe 1 coupling; Corresponding, radially offer four rectangular slots 7 on the fastening devices 3, the angle between adjacent two grooves 7 is set to 90 °, is used for fixing standpipe 1 four control levers 2 on every side.The side of the fastening devices 3 that each groove 7 is corresponding with it is communicated with, and the end face corresponding with each groove 7 is provided with a bolt hole 8, utilizes bolt control lever 2 can be compressed and is fixed in the groove 7 by bolt hole 8.
In the foregoing description, can also in groove 7 pad be set, make things convenient for the spacing between lever for adjusting oil 2 and the standpipe 1, pad can adopt multilayer aluminium matter or rubber spacer, but is not limited thereto.
In the various embodiments described above, can on fastening devices 3, offer a plurality of holes 9, thereby can reduce the weight of fastening devices 3, and then can make the Mass Distribution influence of 3 pairs of standpipe 1 structures of fastening devices less.
In the various embodiments described above, in order to make the fixing more firm of vortex-induced vibration suppression device and standpipe 1, prevent to be moved after restraining device and standpipe 1 from fixing and to rotate, also offer some sulculuses 61 on the side of circular hole 6, on standpipe, during fixing device for installing 3, can insert high fluff material in the sulculus 61, in the present embodiment, sulculus 61 numbers are 4, and circumferentially the interval is 90 °.
In the various embodiments described above; the structure of each parts, the position is set and connects and all can change to some extent; on the basis of technical solutions of the utility model,, should not get rid of outside protection domain of the present utility model improvement and the equivalents that individual component is carried out.
Claims (10)
1. passive flow control device that suppresses vortex induced vibration of slender flexible standpipe, it is characterized in that: it comprises four control levers and a plurality of described standpipes and four fastening devicess that control lever is used of fixing that are arranged on 90 ° at the circumferential interval of standpipe, and described fastening devices uniformly-spaced is provided with along the length direction of described standpipe and control lever.
2. a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe as claimed in claim 1 is characterized in that: described control lever is the existing attached pipeline around the described standpipe.
3. a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe as claimed in claim 1, it is characterized in that: when around described standpipe, not having attached pipeline, described control lever suppresses bar for the isometric vortex-induced vibration of uniformly-spaced additionally setting up along described standpipe length direction, and described vortex-induced vibration to suppress bar be 40% of described standpipe total length along the length summation of described standpipe length direction.
4. as claim 1 or 2 or 3 described a kind of passive flow control devices that suppress vortex induced vibration of slender flexible standpipe, it is characterized in that: described fastening devices comprises the center hole that is divided into two parts and uses by bolted semicircle block, a fixing described standpipe, radially offers the four fixing rectangular slots used of control lever, the side of the described fastening devices that each described rectangular slot is corresponding with it is communicated with, and each end face that is communicated with described rectangular slot is provided with one and withstands the bolt hole of described control lever by bolt.
5. a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe as claimed in claim 4, it is characterized in that: each described semicircle block be symmetrically arranged with an ear clip that has a screw hole respectively in conjunction with end face both sides upper and lower, the described ear clip of symmetry links into an integrated entity by the bolt that is arranged in the described screw hole.
6. a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe as claimed in claim 4 is characterized in that: be provided with in described rectangular slot and regulate the pad that spacing is used between described control lever and standpipe.
7. as claim 1 or 2 or 3 or 5 or 6 described a kind of passive flow control devices that suppress vortex induced vibration of slender flexible standpipe, it is characterized in that: described fastening devices adopts aluminum to make, and offers a plurality of holes on described fastening devices.
8. a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe as claimed in claim 4 is characterized in that: described fastening devices adopts aluminum to make, and offers a plurality of holes on described fastening devices.
9. as claim 1 or 2 or 3 or 5 or 6 or 8 described a kind of passive flow control devices that suppress vortex induced vibration of slender flexible standpipe, it is characterized in that: offer some sulculuses on the side of described center hole.
10. a kind of passive flow control device that suppresses vortex induced vibration of slender flexible standpipe as claimed in claim 4 is characterized in that: offer some sulculuses on the side of described center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202470186U CN201635671U (en) | 2009-11-18 | 2009-11-18 | Passive flow control device capable of suppressing vortex-induced vibration of long and thin flexible riser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202470186U CN201635671U (en) | 2009-11-18 | 2009-11-18 | Passive flow control device capable of suppressing vortex-induced vibration of long and thin flexible riser |
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| CN201635671U true CN201635671U (en) | 2010-11-17 |
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| CN2009202470186U Expired - Fee Related CN201635671U (en) | 2009-11-18 | 2009-11-18 | Passive flow control device capable of suppressing vortex-induced vibration of long and thin flexible riser |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134972A (en) * | 2010-12-31 | 2011-07-27 | 上海交通大学 | Device for inhibiting vortex-induced vibration of underwater standpipe of fish-tail imitating cowling |
| CN102943634A (en) * | 2012-11-16 | 2013-02-27 | 西南石油大学 | Free-rotation impeller device for inhibiting eddy induced vibration of marine riser |
| CN102967429A (en) * | 2012-11-06 | 2013-03-13 | 上海交通大学 | Device for simulating bidirectional self-oscillation under mutual interference of two stand column models under uniform flow |
| CN104179183A (en) * | 2014-08-29 | 2014-12-03 | 浙江海洋学院 | Recyclable protecting device for inhibiting vortex-induced vibration of deepwater steel pipe pile |
| CN106958426A (en) * | 2017-03-03 | 2017-07-18 | 中国石油大学(华东) | That assembles rotary blade revolves vortex-induced vibration of marine riser restraining device and method |
-
2009
- 2009-11-18 CN CN2009202470186U patent/CN201635671U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134972A (en) * | 2010-12-31 | 2011-07-27 | 上海交通大学 | Device for inhibiting vortex-induced vibration of underwater standpipe of fish-tail imitating cowling |
| CN102134972B (en) * | 2010-12-31 | 2013-01-09 | 上海交通大学 | Device for inhibiting vortex-induced vibration of underwater standpipe of fish-tail imitating cowling |
| CN102967429A (en) * | 2012-11-06 | 2013-03-13 | 上海交通大学 | Device for simulating bidirectional self-oscillation under mutual interference of two stand column models under uniform flow |
| CN102967429B (en) * | 2012-11-06 | 2015-07-08 | 上海交通大学 | Device for simulating bidirectional self-oscillation under mutual interference of two stand column models under uniform flow |
| CN102943634A (en) * | 2012-11-16 | 2013-02-27 | 西南石油大学 | Free-rotation impeller device for inhibiting eddy induced vibration of marine riser |
| CN104179183A (en) * | 2014-08-29 | 2014-12-03 | 浙江海洋学院 | Recyclable protecting device for inhibiting vortex-induced vibration of deepwater steel pipe pile |
| CN106958426A (en) * | 2017-03-03 | 2017-07-18 | 中国石油大学(华东) | That assembles rotary blade revolves vortex-induced vibration of marine riser restraining device and method |
| CN106958426B (en) * | 2017-03-03 | 2018-04-20 | 中国石油大学(华东) | Assembling rotary blade revolves vortex-induced vibration of marine riser restraining device and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Research Institute Patentee after: Dalian University of Technology Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Research Center Patentee before: Dalian University of Technology |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20151118 |