CN105626964A - Deepwater pipe-in-pipe buckle arrestor based on F-type section deformation element - Google Patents
Deepwater pipe-in-pipe buckle arrestor based on F-type section deformation element Download PDFInfo
- Publication number
- CN105626964A CN105626964A CN201610041151.0A CN201610041151A CN105626964A CN 105626964 A CN105626964 A CN 105626964A CN 201610041151 A CN201610041151 A CN 201610041151A CN 105626964 A CN105626964 A CN 105626964A
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- China
- Prior art keywords
- pipe
- deformation element
- type section
- section deformation
- buckle arrestor
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- Pending
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- 229920000642 polymer Polymers 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 3
- 125000006850 spacer group Chemical group 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000012806 monitoring device Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract 2
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000005452 bending Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 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
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009931 pascalization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 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 an F-type section deformation element. The deepwater pipe-in-pipe buckle arrestor based on the F-type section deformation element is characterized in that the F-type section deformation element is added in an annular space between an inner pipe and an outer pipe of a pipe-in-pipe assembly, and forms axial interlocking according to the concave-convex characteristic of the F-type section deformation element, so that the pipe-in-pipe assembly has certain flexibility, the strength of the F-type section deformation element can improve the strength of the pipe-in-pipe assembly, and the buckle arresting function is realized. As for the pipe-in-pipe buckle arrestor composed of the F-type section deformation element and a polymer shell, the size of the pipe-in-pipe assembly does not need to be changed, and the pipe-in-pipe buckle arrestor is directly installed between the inner pipe and the outer pipe and does not affect a heat insulation device in the pipe-in-pipe assembly. The buckle arrestor has universality, can be cut according to pipe-in-pipe assemblies in different sizes, and can be directly installed on the outer pipe by a pipe-in-pipe assembly manufacturer, and the polymer shell made of heat-preservation materials can further improve the heat-preservation performance of the buckle arrestor. The pipe-in-pipe assembly has certain flexibility, buckling and buckling spreading of the deepwater pipe-in-pipe assembly can be effectively prevented during storage, installation and operation, the installation efficiency and buckle arresting efficiency of the deepwater pipe-in-pipe assembly are improved, and the cost is reduced.
Description
Technical field
The invention belongs to submarine pipeline facility laying technology field, be specifically related to a kind of F of utilization type section deformation element to prevent the buckle arrestor of buckle propagation.
Background technology
China's submarine oil resources is very abundant, and therefore submarine pipeline particularly deep-water subsea pipeline has very vast potential for future development. Under seabed special environment particularly high hydrostatic pressure effect, for a long time, buckling problem hampers the development of submarine pipeline always.
Flexing has two processes: first: outer partial pressure is more than this place's pipeline strength so that conquassation phenomenon occurs pipeline at this place; Second, after conquassation phenomenon locally occurs pipeline, if close vicinity tube wall strength is less than the critical pressure of buckle propagation, buckle propagation phenomenon will be there is. Research finds, maintains the minimum pressure of pipeline buckle propagation, the i.e. critical pressure of buckle propagation, about the 15% of buckling failure minimum pressure only occurs. Therefore, once produce cripling unstability, flexing will be propagated from local damage position vertically with the speed of hundreds of meters, thus causing the large-scale damage of submarine pipeline, causes huge economic loss.
Two processes of corresponding buckle propagation, solving buckling problem has two kinds of methods. First, increase pipeline wall thickness, general increase pipeline strength, it is ensured that pipeline strength is always more than external pressure completely. Second, Yan Guandao arranges buckle arrestor at a certain distance, increases pipeline local strength so that buckle propagation is limited between two buckle arrestors, thus the conquassation avoiding whole piece pipeline destroys. Two kinds of methods compare, and first method is added significantly to 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 so that steel consumption is greatly reduced, and pipeline weight also significantly alleviates, very economical. Furthermore, it is possible to come balanced economy and anti-bend requirement by adjusting the spacing of buckle arrestor, relatively flexibly. Therefore, buckle arrestor technology is widely used in engineering practice.
Currently used buckle arrestor main Types has monoblock type, sliding, jacket type and interior ring type.
Integrated buckle arrestor internal diameter is identical with internal diameter of the pipeline, but wall thickness is more 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.
Jacket type buckle arrestor principle is similar to sliding, and it is made up of two half-shell, is fastened by bolts on pipeline outer wall during use.
Internal ring buckle arrestor is similar to sliding buckle arrestor principle, is suitable for for tube-in-tube. Buckle arrestor pipe ring is placed in inner and outer pipes pipe seam, and is close to outer tube.
Monoblock type, sliding and three kinds of forms of jacket type buckle arrestor all significantly increase local caliber, and this brings constant to the transport of pipeline and storage. Integrated buckle arrestor adopts the form of welding to be connected with pipeline, it is easy to produce weld defect and stress is concentrated. And although sliding and jacket type need not weld, structure is relatively simple, installs more convenient, but anti-bend efficiency is low, it is easy to occurs " U-shaped pass through ", thus is only applicable to the deep pipeline of shallow water.
Interior ring type buckle arrestor is compared the buckle arrestor of three of the above form and is not changed outer diameter tube, and anti-bend efficiency is higher, but it is less convenient to manufacture installation, and Financial cost is also above the buckle arrestor of three of the above form. Additionally, due to the major part 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
Present invention is primarily targeted at the problems referred to above overcoming prior art to exist, there is provided a kind of pipe-in-pipe buckle arrestor based on F type section deformation element that can improve deep water tube-in-tube bending property, it is possible to prevent deep water tube-in-tube from bearing the flexing and buckle propagation that bend and occur in storage, transport, installation and operation process.
For achieving the above object, the present invention takes techniques below scheme:
Along pipe lengths, every a segment distance (100m-500m), the caryogram buckle arrestor based on F type cross section described in this patent is installed. This caryogram buckle arrestor is by spacer ring, the deformation element in F type cross section and polymer shell composition. F type section deformation element is formed chain by himself concavo-convex characteristic, is assemblied in the annular space between inner and outer pipes, near outer pipe internal surface; Polymer shell is fixed on inside F type 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 inner surface contacts with polymer shell, and polymer shell and inner tube outer surface have gap, can be used for the installation of heat ray filter. Polymer shell itself can also have heat-insulating capability, thus strengthening the heat-insulating property of pipeline. Gap between deformation element can so that pipeline can hettocyrtosis, it is curling in order to store transport that this can assist it to complete. Himself can bear radial pressure thus preventing buckle propagation, it is achieved anti-bend function.
This patent, owing to have employed technique scheme, has the following advantages
1. the buckle arrestor main body based on F section deformation element is wrapped in the annular space of tube-in-tube, 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 deformation element self, space is had at chain place, this gap makes tube-in-tube buckle arrestor deformation element when bending that relative motion can be occurred from without bearing moment of flexure, there is good flexibility, facilitate tube storage to transport, the stress of bending tube section in pipe laying process (upper curved section and lower horizontal section) in S type pipe laying can be effectively reduced, improve pipe laying efficiency.
2. it is installed in tube-in-tube inner and outer pipes annular space based on the buckle arrestor of F section deformation element, does not increase its external diameter, do not affect original tube-in-tube device (such as heat ray filter etc.). Additionally, select the polymer shell that the material with heat-insulating property manufactures, it is also possible to increase the heat-insulating property of pipeline.
3. the buckle arrestor based on F section deformation element has versatility. Producer only need to produce the deformation element in the F cross section of a kind of specification, it is possible to is assemblied in the tube-in-tube of different tube diameters. Take this kind of assembling mode, processing without scene during pipe laying, being greatly improved pipe laying efficiency, thus saving production management's expense.
4. groove is set on F type section deformation element, can be used for placing Monitoring Pinpelines device, such as optical fiber or the temperature sensor of monitoring strain, it is also possible in placing pipe heating device.
Accompanying drawing explanation
Fig. 1: be the structural representation that in the present invention, tube-in-tube installs buckle arrestor
Fig. 2: be the schematic cross-section of caryogram anti-bend device in the present invention
Fig. 3: be the structural representation of F type section deformation element in the present invention
Fig. 4: be the another kind of structural representation of F type section deformation element in the present invention
Fig. 5: be the another kind of structural representation of F type section deformation element in the present invention
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
As it is shown in figure 1, tube-in-tube 1 is made up of interior pipe 2 and outer tube 4. F type section deformation element 10 is spirally wound in the annular space between inner and outer pipes close to the angle of 90 degree with pipe lengths, and its outer surface and outer tube wall have at least two-point contact, and inner surface separates with inner tube outer surface and do not contact.
As in figure 2 it is shown, the central shaft of tube-in-tube 1 is AA. In the annular space 6 of interior pipe 2 and outer tube 4, it is mounted with the caryogram buckle arrestor described in this patent. This caryogram buckle arrestor is made up of spacer ring 7, one or more deformation element 10 (Fig. 1, in its cross section such as Fig. 2 shown in 18,19) and polymer shell 15.
In tube-in-tube 1, spacer ring 7 will be installed at a certain distance. The axial length of buckle arrestor delimited by spacer ring 7. The inner surface of spacer ring 7 fixes (welding or other fixed forms) on interior pipe 2 outer surface 14, and outer surface and outer tube 4 inner surface 12 exist a gap 8 and make outer tube 4 can be inserted in interior pipe 2. Spacer ring 7 can be made up of the insulation material with some strength. Make if not by insulation material, heat ray filter can be installed between spacer ring 7 and interior pipe 2 to ensure the heat-insulating property of pipeline.
The material of polymer shell 15 usually has the polymer of heat-insulating property, to ensure the heat-insulating property of pipeline. Space 16 is left between inner surface 17 and the outer surface 14 of interior pipe 2 of polymer shell 15. This space can be used for the installation of the heat-preserving equipment of former tube-in-tube. Polymer shell 15 is attached on the inner surface of deformation element, and for ensureing effect of heat insulation, polymer shell is to seal, and selects the polymer shell that insulation material is made can improve its heat-insulating property.
The core main body of buckle arrestor is made up of one or more F type section deformation elements 10, and F type section deformation element is formed axially chain by self concavo-convex characteristic, and has deformation gap 20 at chain place. Realizing slight deformation by gap 20, himself can bearing radial pressure thus preventing the propagation of flexing. The outer surface 11 of deformation element 10 has at least 2 point cantact with the inner surface 12 of outer tube 4, all contacts along its length as much as possible, in order to axial limiting. Its inner 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 it is shown on figure 3, the core main body of the chain composition buckle arrestor of F type element. Gap 20 is there is between them. The width in this gap can change when tubulation according to concrete deformation requirements. This gap can when tube-in-tube pipe laying auxiliary deformation.
As shown in Figure 4, F type section deformation member top surface (or other surfaces) has the groove 21 of one circular (or other shapes), is used for alleviating own wt or laying monitoring device or heater. Buckle arrestor own wt can be alleviated by designing the method for groove. Also can put into Monitoring Pinpelines device in a groove, as monitored the optical fiber of strain, temperature sensor etc., or put into the area heating installation of pipeline.
As it is shown in figure 5, there is small inclination gradient �� (less than 15 degree) in F type section deformation element chain place upper surface (or lower surface), in order to avoid stress to concentrate on chain place, thus preventing chain characteristic to lose efficacy.
Claims (8)
1., based on a deep water pipe-in-pipe buckle arrestor for F type section deformation element, it adds the caryogram anti-bend device being made up of F type section deformation element, polymer shell and spacer ring in tube-in-tube inner and outer pipes annular space; F type section deformation element is formed chain by himself concavo-convex characteristic, is assemblied in the annular space between inner and outer pipes, near outer pipe internal surface; Polymer shell is fixed on inside F type 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 F type section deformation element as claimed in claim 1, it is characterised 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 F type section deformation element as claimed in claim 1 or 2, it is characterized in that: F type deformation element is spirally wound in the annular space between inner and outer pipes close to the angle of 90 degree with pipe lengths, its outer surface and outer tube wall have at least two-point contact, and inner surface separates with inner tube outer surface and do not contact.
4. a kind of deep water pipe-in-pipe buckle arrestor based on F type section deformation element as claimed in claim 1 or 2, it is characterized in that: polymer shell is attached on the inner surface of deformation element, for ensureing effect of heat insulation, polymer shell is to seal, and selects the polymer shell that insulation material is made can improve its heat-insulating property.
5. a kind of deep water pipe-in-pipe buckle arrestor based on F type 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 ray filter to ensure the heat-insulating property of pipeline between spacer ring and interior pipe.
6. a kind of deep water pipe-in-pipe buckle arrestor based on F type section deformation element as claimed in claim 1 or 2, it is characterised in that: F type section deformation element forms axial self-locking by self concavo-convex characteristic, and has deformation gap at chain place.
7. a kind of deep water pipe-in-pipe buckle arrestor based on F type section deformation element as claimed in claim 1 or 2, it is characterized in that: F type section deformation member top surface (or other surfaces) has the groove of one circular (or other shapes), be used for alleviating own wt or laying monitoring device or heater.
8. a kind of deep water pipe-in-pipe buckle arrestor based on F type section deformation element as claimed in claim 1 or 2, it is characterized in that: F type section deformation element chain place upper surface (or lower surface) exists the small inclination gradient, in order to avoid stress to concentrate on chain place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610041151.0A CN105626964A (en) | 2016-01-21 | 2016-01-21 | Deepwater pipe-in-pipe buckle arrestor based on F-type section deformation element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610041151.0A CN105626964A (en) | 2016-01-21 | 2016-01-21 | Deepwater pipe-in-pipe buckle arrestor based on F-type section deformation element |
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| Publication Number | Publication Date |
|---|---|
| CN105626964A true CN105626964A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610041151.0A Pending CN105626964A (en) | 2016-01-21 | 2016-01-21 | Deepwater pipe-in-pipe buckle arrestor based on F-type section deformation element |
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| CN (1) | CN105626964A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010136801A1 (en) * | 2009-05-26 | 2010-12-02 | Pipeline Engineering & Supply Company Limited | Bend restrictor |
| CN101970923A (en) * | 2008-01-07 | 2011-02-09 | 韦尔斯特里姆国际有限公司 | Flexible pipe having pressure armour layer |
| CN102272505A (en) * | 2008-11-12 | 2011-12-07 | 韦尔斯特里姆国际有限公司 | Flexible pipe having pressure armour layer and components thereof |
| CN103411048A (en) * | 2013-08-23 | 2013-11-27 | 中国海洋石油总公司 | F-shaped cross section pressure-resistant armor layer of composite hose |
| CN204176133U (en) * | 2014-07-10 | 2015-02-25 | 中国石油大学(北京) | Based on the deep water pipe-in-pipe buckle arrestor of dentation section deformation element |
| 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 CN201610041151.0A patent/CN105626964A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101970923A (en) * | 2008-01-07 | 2011-02-09 | 韦尔斯特里姆国际有限公司 | Flexible pipe having pressure armour layer |
| CN102272505A (en) * | 2008-11-12 | 2011-12-07 | 韦尔斯特里姆国际有限公司 | Flexible pipe having pressure armour layer and components thereof |
| WO2010136801A1 (en) * | 2009-05-26 | 2010-12-02 | Pipeline Engineering & Supply Company Limited | Bend restrictor |
| CN103411048A (en) * | 2013-08-23 | 2013-11-27 | 中国海洋石油总公司 | F-shaped cross section pressure-resistant armor layer of composite hose |
| CN204176133U (en) * | 2014-07-10 | 2015-02-25 | 中国石油大学(北京) | Based on the deep water pipe-in-pipe buckle arrestor of dentation section deformation element |
| 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 |
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Application publication date: 20160601 |
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