CN105485428A - Deepwater pipe-in-pipe buckle arrestor based on WX section deformation elements - Google Patents
Deepwater pipe-in-pipe buckle arrestor based on WX section deformation elements Download PDFInfo
- Publication number
- CN105485428A CN105485428A CN201610041152.5A CN201610041152A CN105485428A CN 105485428 A CN105485428 A CN 105485428A CN 201610041152 A CN201610041152 A CN 201610041152A CN 105485428 A CN105485428 A CN 105485428A
- Authority
- CN
- China
- Prior art keywords
- pipe
- pipeline
- buckle arrestor
- deformation element
- section deformation
- 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.)
- Pending
Links
- 229920000642 polymer Polymers 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 239000011810 insulating material Substances 0.000 claims abstract description 5
- 125000006850 spacer group Chemical group 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 238000005452 bending Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009931 pascalization Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats, weights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
Abstract
The invention relates to a deepwater pipe-in-pipe buckle arrestor based on WX section deformation elements. The buckle arrestor is characterized in that the WX section deformation elements are additionally arranged in an annular space between an inner pipe and an outer pipe of a pipe-in-pipe pipeline. The WX section deformation elements enable the pipeline to have certain flexibility through interlocking according to concave-convex characteristics of W type elements and X type elements, the WX section deformation elements can bear certain radial pressure of the pipeline due to strength, the pipeline is partially strengthened, and the buckling arresting function is realized. According to the pipe-in-pipe buckle arrestor based on the WX section deformation elements, the size of the pipe-in-pipe pipeline does not need to be changed, and the WX section deformation elements are directly arranged between the inner pipe and the outer pipe and cannot influence thermal insulation devices in the pipe-in-pipe pipeline. The buckle arrestor further has universality, can be cut according to a pipe-in-pipe pipeline in any size and can be directly mounted on the outer pipe by a pipe-in-pipe pipeline manufacturer, and the thermal insulation performance of the buckle arrestor can be further improved due to use of a polymer casing made from a thermal insulating material. The buckle arrestor can prevent a deepwater pipe-in-pipe pipeline from buckling and buckling spreading in the storage, mounting and operation processes, meanwhile, the pipeline has certain bending performance, the laying and buckling efficiency of the deepwater pipe-in-pipe pipeline can be improved, and the cost is saved.
Description
Technical field
The invention belongs to submarine pipeline facility laying technology field, be specifically related to a kind of WX of utilization section deformation element to prevent the buckle arrestor of buckle propagation.
Background technique
Submarine pipeline is the Main Means of offshore oil and gas conveying, and under seabed particular surroundings particularly high hydrostatic pressure force environment, for a long time, buckling problem hampers the development of submarine pipeline always.
Flexing generating process can be divided into two stages: first: outer partial pressure is greater than this place's pipeline strength, makes pipeline, at this place, conquassation phenomenon occur; The second, after conquassation phenomenon locally occurs pipeline, if close vicinity tube wall strength is less than critical pressure, buckle propagation phenomenon will be there is.Research finds, maintains the pressure minimum of pipeline buckle propagation, i.e. the critical pressure of flexing, only has about 15% of the pressure minimum that buckling failure occurs.Therefore, once produce cripling unstability, flexing will be propagated from local damage position vertically with the speed of hundreds of meters, thus causes the large-scale damage of submarine pipeline, causes huge economic loss.
Two processes of corresponding buckle propagation, solving buckling problem has the following two kinds method.The first, increase pipeline wall thickness completely, general increase pipeline strength, ensure that pipeline strength is always greater than external pressure.The second, Yan Guandao arranges buckle arrestor at a certain distance, increases pipeline local strength, buckle propagation is limited between two buckle arrestors, thus the conquassation avoiding whole piece pipeline destroys.Two kinds of methods compare, and first method significantly adds steel consumption, economical not, and add the weight of pipeline simultaneously, and installing to the laying of pipeline makes troubles.Second method is using pipeline between buckle arrestor as cost, and steel consumption is significantly reduced, and pipeline weight also significantly alleviates, very economical.In addition, balanced economy and anti-bend requirement can be come by the spacing adjusting buckle arrestor, more flexibly.Therefore, buckle arrestor technology is widely used in engineering practice.
The buckle arrestor main Types of current use has integrated type, sliding, jacketed type and interior ring type.
Integrated buckle arrestor internal diameter is identical with internal diameter of the pipeline, but wall thickness is greater than pipeline wall thickness, is connected with pipeline by welding.
Sliding buckle arrestor internal diameter is identical with outer diameter tube, is enclosed within pipeline to increase the hoop rigidity of pipeline local.
Jacketed type buckle arrestor principle is similar to sliding, and it is made up of two and half shells, is fastened by bolts on pipeline outer wall during use.
Inner ring buckle arrestor is similar to sliding buckle arrestor principle, is suitable for for pipe-in-pipe.Buckle arrestor pipe ring is placed in inner and outer pipes pipe seam, and is close to outer tube.
Integrated type, buckle arrestor that is sliding and jacketed type three kinds of forms all significantly increase local caliber, and this brings inconvenience to the transport of pipeline and storage.Integrated buckle arrestor adopts the form of welding to be connected with pipeline, and easily generation weld defects and stress are concentrated.And although sliding and jacketed type does not need welding, structure is comparatively simple, and install more convenient, anti-bend efficiency is low, " U-shaped pass through " easily occurs, is thus only applicable to the dark pipeline of shallow water.
The buckle arrestor that interior ring type buckle arrestor compares above three kinds of forms does not change outer diameter tube, and anti-bend efficiency is higher, but making and installation is not too convenient, and financial cost is also higher than the buckle arrestor of above three kinds of forms.In addition, because the major component strengthened is be close to the pipe ring of outer tube, the local damage caused in process of deployment operationally can not restore.
Summary of the invention
Main purpose of the present invention is the problems referred to above overcoming prior art existence, a kind of pipe-in-pipe buckle arrestor based on WX section deformation element that can improve deep water pipe-in-pipe bending properties is provided, can prevents deep water pipe-in-pipe from bearing in storage, transport, installation and operation process and bend and the flexing of generation and buckle propagation.
For achieving the above object, the present invention takes following technological scheme:
Along pipe lengths, every a segment distance (100m-500m), the caryogram buckle arrestor based on WX cross section described in this patent is installed.This caryogram buckle arrestor is by spacer ring, and the deformation element in WX cross section and polymer shell form.WX section deformation element is chain mutually according to the concavo-convex characteristic of W type element and X-type element, is assemblied in the annular space between inner and outer pipes, near outer pipe internal surface.Polymer shell is fixed on inside WX sectional element, there is a fixed gap with inner tube outer surface; Spacer ring is arranged in the annular region at caryogram buckle arrestor two ends, and its outer surface is outer pipe internal surface closely, but there is a gap.Deformation element internal surface contacts with polymer shell, and polymer shell and inner tube outer surface have gap, in order to the installation of heat-proof device.Polymer shell itself also can have heat-insulating capability, thus ensure that the thermal insulation property of pipeline.Spacer ring is arranged in the annular region at caryogram buckle arrestor two ends, and its outer surface is outer pipe internal surface closely, but there is a gap.Gap between deformation element can make pipeline can hettocyrtosis, facilitates it to store transport.Himself can bear radial pressure thus prevent buckle propagation, realizes anti-bend function.
This patent, owing to have employed technique scheme, has the following advantages:
1. the buckle arrestor main body based on WX section deformation element is wrapped in the annular space of pipe-in-pipe, and himself intensity can bear radial pressure, resists external pressure well, plays the effect preventing flexing and buckle propagation.Simultaneously, buckle arrestor main body is formed axially chain according to the concavo-convex characteristic of W type and X-type element, space is had at chain place, this gap makes pipe-in-pipe buckle arrestor deformation element when bending relative movement can occur thus need not bear moment of flexure, there is good flexibility, facilitate tube storage to transport, the stress of bending tube section in pipe laying process (as the upper bend section in S type pipe laying and lower horizontal section) can be effectively reduced, improve pipe laying efficiency.
2. the buckle arrestor based on WX section deformation element is installed in pipe-in-pipe inner and outer pipes annular space, does not increase its external diameter, does not affect original pipe-in-pipe device (as heat-proof device etc.).In addition, select the material with thermal insulation property to manufacture polymer shell, the thermal insulation property of pipeline can also be increased.
3. the buckle arrestor based on WX section deformation element has versatility.Producer only need produce a kind of deformation element of WX cross section of specification, just can be assemblied in the pipe-in-pipe of different tube diameters.Take this kind of assembling mode, process without the need to scene during pipe laying, can greatly improve pipe laying efficiency, thus save production management expense.
4. groove is set on X-type section deformation element, can be used for placing pipeline monitoring device, as optical fiber or the temperature transducer of monitoring strain, also can be used for placing pipe heating device.
Accompanying drawing explanation
Fig. 1: be the structural representation that in the present invention, pipe-in-pipe installs buckle arrestor
Fig. 2: the schematic cross-section being caryogram anti-bend device in the present invention
Fig. 3: the structural representation being WX section deformation element in the present invention
Fig. 4: the another kind of structural representation being WX section deformation element in the present invention
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, pipe-in-pipe 1 is made up of interior pipe 2 and outer tube 4.WX section deformation element 10 is spirally wound in the annular space between inner and outer pipes with pipe lengths close to the angle of 90 degree, and its outer surface and outer tube wall have two-point contact at least, and internal surface separates with inner tube outer surface and do not contact.
As shown in Figure 2, the central shaft of pipe-in-pipe 1 is AA.In the annular space 6 of interior pipe 2 and outer tube 4, the caryogram buckle arrestor described in this patent is installed.This caryogram buckle arrestor is made up of spacer ring 7, one or more deformation element 10 (Fig. 1, its cross section is as shown in Fig. 2 18,19) and polymer shell 15.
In pipe-in-pipe 1, at a certain distance spacer ring 7 will be installed.Spacer ring 7 defines the axial length of buckle arrestor.The internal surface of spacer ring 7 is fixed (welding or other means of fixation), and on interior pipe 2 outer surface 14, there is a gap 8 and make outer tube 4 can be inserted in interior pipe 2 in outer surface and outer tube 4 internal surface 12.Spacer ring 7 can be made up of the thermal insulating material with some strength.Make if not by thermal insulating material, heat-proof device can be installed between spacer ring 7 and interior pipe 2 to ensure the thermal insulation property of pipeline.
The material of polymer shell 15 normally has the polymer of thermal insulation property, to ensure the thermal insulation property of pipeline.Space 16 is left between the internal surface 17 of polymer shell 15 and the outer surface 14 of interior pipe 2.Polymer shell 15 is attached on the internal surface of deformation element, and for ensureing effect of heat insulation, polymer shell is sealing, selects thermal insulating material to manufacture polymer shell and can improve its thermal insulation property.
The core main body of buckle arrestor is made up of one or more deformation element 10, is formed axially chain, and have deformation gap 20 at chain place by the concavo-convex characteristic of W type element and X-type element.Realize slight distortion by gap 20, himself can bear radial pressure thus prevent the propagation of flexing.The outer surface 11 of deformation element 10 has 2 point cantact at least with the internal surface 12 of outer tube 4, all contacts along its length as much as possible, in order to axial limiting.Its internal surface 13 contacts with shell 15.The ideal material of deformation element 10 is carbon steel, but also can be made up of the other materials with some strength.The sectional dimension of deformation element 10 is adjustable, between 0.01m-10m.
As shown in Figure 3, the core main body of W type element 18 and the mutual chain formation buckle arrestor of X-type original paper 19.Gap 20 is there is between them.The width in this gap can change when tubulation according to concrete deformation requirements.This gap can in pipe auxiliary deformation during pipe laying.
As shown in Figure 4, the X-type member top surface (or other surfaces) in WX section deformation element has the groove 21 an of circle (or other shapes), for alleviating own wt or laying monitoring device or heating equipment.Buckle arrestor own wt can be alleviated by the method designing groove.Also can put into Monitoring Pinpelines device in a groove, as the optical fiber, temperature transducer etc. of monitoring strain, or put into the area heating installation of pipeline.
Claims (7)
1., based on a deep water pipe-in-pipe buckle arrestor for WX section deformation element, it adds the caryogram anti-bend device be made up of WX section deformation element, polymer shell and spacer ring in pipe-in-pipe inner and outer pipes annular space; WX section deformation element is chain mutually according to the concavo-convex characteristic of W type element and X-type element, is assemblied in the annular space between inner and outer pipes, near outer pipe internal surface; Polymer shell is fixed on inside WX sectional element, there is a fixed gap with inner tube outer surface; Spacer ring is arranged in the annular region at caryogram buckle arrestor two ends, and its outer surface is outer pipe internal surface closely, but there is a gap.
2. a kind of deep water pipe-in-pipe buckle arrestor based on WX section deformation element as claimed in claim 1, is characterized in that: its caryogram anti-bend device is made up of deformation element, polymer shell and spacer ring, and the sectional dimension of deformation element is adjustable, between 0.01m-10m.
3. a kind of deep water pipe-in-pipe buckle arrestor based on WX section deformation element as claimed in claim 1 or 2, it is characterized in that: WX deformation element is spirally wound in the annular space between inner and outer pipes with pipe lengths close to the angle of 90 degree, its outer surface and outer tube wall have two-point contact at least, and internal surface separates with inner tube outer surface and do not contact.
4. a kind of deep water pipe-in-pipe buckle arrestor based on WX section deformation element as claimed in claim 1 or 2, it is characterized in that: polymer shell is attached on the internal surface of deformation element, for ensureing effect of heat insulation, polymer shell is sealing, selects thermal insulating material to manufacture polymer shell and can improve its thermal insulation property.
5. a kind of deep water pipe-in-pipe buckle arrestor based on WX section deformation element as claimed in claim 1 or 2, it is characterized in that: the spacer ring separated for caryogram anti-bend device two ends, there is a gap and make outer tube can be inserted in interior pipe in outer surface and outer pipe internal surface, can install heat-proof device to ensure the thermal insulation property of pipeline between spacer ring and interior pipe.
6. a kind of deep water pipe-in-pipe buckle arrestor based on WX section deformation element as claimed in claim 1 or 2, is characterized in that: WX section deformation element is formed axially chain by the concavo-convex characteristic of W type element and X-type element, and has deformation gap at chain place.
7. a kind of deep water pipe-in-pipe buckle arrestor based on WX section deformation element as claimed in claim 1 or 2, it is characterized in that: the X-type member top surface (or other surfaces) in WX section deformation element has the groove an of circle (or other shapes), for alleviating own wt or laying monitoring device or heating equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610041152.5A CN105485428A (en) | 2016-01-21 | 2016-01-21 | Deepwater pipe-in-pipe buckle arrestor based on WX section deformation elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610041152.5A CN105485428A (en) | 2016-01-21 | 2016-01-21 | Deepwater pipe-in-pipe buckle arrestor based on WX section deformation elements |
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| Publication Number | Publication Date |
|---|---|
| CN105485428A true CN105485428A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610041152.5A Pending CN105485428A (en) | 2016-01-21 | 2016-01-21 | Deepwater pipe-in-pipe buckle arrestor based on WX section deformation elements |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630755A (en) * | 2018-12-29 | 2019-04-16 | 天津新星科能源技术有限公司 | A kind of submarine pipeline and installation method with monitoring optical fiber installation coating |
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| US20150060589A1 (en) * | 2012-04-12 | 2015-03-05 | National Oilwell Varco Denmark I/S | Method of producing an unbonded flexible pipe and an unbonded flexible pipe |
| CN204704479U (en) * | 2014-11-03 | 2015-10-14 | 中国石油大学(北京) | Based on C type section deformation element deep water pipe-in-pipe buckle arrestor |
| CN204704478U (en) * | 2014-11-03 | 2015-10-14 | 中国石油大学(北京) | Based on the deep water pipe-in-pipe buckle arrestor of T-shaped section deformation element |
-
2016
- 2016-01-21 CN CN201610041152.5A patent/CN105485428A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040221907A1 (en) * | 1998-12-16 | 2004-11-11 | Kristian Glejbol | Armoured flexible pipe and use of same |
| WO2010136801A1 (en) * | 2009-05-26 | 2010-12-02 | Pipeline Engineering & Supply Company Limited | Bend restrictor |
| US20120273080A1 (en) * | 2009-12-16 | 2012-11-01 | National Oilwell Varco Denmark I/S | Flexible pipe and a method of producing a flexible pipe |
| CN104254724A (en) * | 2011-12-30 | 2014-12-31 | 韦尔斯特里姆国际有限公司 | Flexible pipe body and method of producing same |
| US20150060589A1 (en) * | 2012-04-12 | 2015-03-05 | National Oilwell Varco Denmark I/S | Method of producing an unbonded flexible pipe and an unbonded flexible pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109630755A (en) * | 2018-12-29 | 2019-04-16 | 天津新星科能源技术有限公司 | A kind of submarine pipeline and installation method with monitoring optical fiber installation coating |
| CN109630755B (en) * | 2018-12-29 | 2024-02-06 | 天津新星科能源技术有限公司 | Submarine pipeline with monitoring optical fiber installation coating and installation method |
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