CN205745646U - Based on CX section deformation element deep water pipe-in-pipe buckle arrestor - Google Patents
Based on CX section deformation element deep water pipe-in-pipe buckle arrestor Download PDFInfo
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- CN205745646U CN205745646U CN201620058870.9U CN201620058870U CN205745646U CN 205745646 U CN205745646 U CN 205745646U CN 201620058870 U CN201620058870 U CN 201620058870U CN 205745646 U CN205745646 U CN 205745646U
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Abstract
This utility model relates to deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it is characterised in that: in the inner and outer pipes annular space of tube-in-tube, add CX section deformation element.CX section deformation element is formed according to the concavo-convex characteristic of c-type element and X-type element and chain makes pipeline have certain bending property, and himself intensity can play the effect of opposing external pressure simultaneously.The pipe-in-pipe buckle arrestor constituted based on CX section deformation element need not change tube-in-tube size, is directly mounted between inner and outer pipes, and does not interferes with the heat ray filter in tube-in-tube.This buckle arrestor also has versatility, for various sizes of tube-in-tube cutting, and can be directly installed on outer tube by tube-in-tube manufacturer, selects the polymer shell of insulation material can also improve the heat-insulating property of buckle arrestor.This utility model is possible to prevent deep water tube-in-tube at storage, installation, operating flexing and buckle propagation, the most also makes pipeline have certain flexibility, can improve pipe laying and the anti-bend efficiency of deep water tube-in-tube, cost-effective.
Description
Technical field
This utility model belongs to submarine pipeline facility laying technology field, is specifically related to a kind of CX of utilization section deformation element to prevent the buckle arrestor of buckle propagation.
Background technology
Submarine pipeline, as a kind of fluid media (medium) means of delivery, has the advantages such as economy, quick, conveying capacity is big, is aorta and the life line of exploitation of offshore oil and gas.Under seabed special environment particularly high hydrostatic pressure force environment, for a long time, flexing conquassation and propagation problem hamper the development of submarine pipeline always.
Flexing has two processes: first: outer partial pressure is more than pipeline strength at this so that pipeline occurs conquassation phenomenon in this place；Second, after pipeline locally occurs conquassation phenomenon, if close vicinity tube wall strength is less than critical pressure, buckle propagation phenomenon will occur.Research find, maintain pipeline buckle propagation minimum pressure, i.e. the critical pressure of flexing, only occur buckling failure minimum pressure about 15%.Therefore, once producing cripling unstability, flexing from local damage position with the speed Propagation of hundreds of meters, thus will cause the large-scale damage of submarine pipeline, cause huge economic loss.
Setting about from the two of buckle propagation processes, solving buckling problem has two kinds of methods.First, increase pipeline wall thickness, general increase pipeline strength completely, it is ensured that pipeline strength is always more than external pressure.Second, Yan Guandao arrange buckle arrestor at a certain distance, increase 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 the most significantly alleviates, very economical.Furthermore, it is possible to come balanced economy and anti-bend requirement by the spacing adjusting buckle arrestor, the most flexibly.Therefore, buckle arrestor technology is widely used in engineering practice.
The main Types of currently used buckle arrestor 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 uses the form of welding to be connected with pipeline, easily produces weld defect and stress is concentrated.And although sliding and jacket type need not welding, structure is relatively simple, installs more convenient, but anti-bend efficiency is low, is susceptible to " U-shaped pass through ", thus is only applicable to the deep pipeline of shallow water.
Interior ring type buckle arrestor does not change outer diameter tube for comparing the buckle arrestor of three of the above form, and anti-bend efficiency is higher, but manufactures and install the most convenient, and Financial cost is also above the buckle arrestor of three of the above form.Additionally, due to the major part strengthened is to 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
For the problems referred to above overcoming prior art to exist, this utility model provides a kind of pipe-in-pipe buckle arrestor based on CX section deformation element that can improve deep water tube-in-tube bending property, is possible to prevent deep water tube-in-tube to bear the flexing and buckle propagation bent and occur during storage, transport, installation and operation.
For achieving the above object, this utility model takes techniques below scheme:
Along pipe lengths, every a segment distance (100m-500m), the caryogram buckle arrestor based on CX cross section described in this patent is installed.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it adds the caryogram buckle arrestor being made up of CX section deformation element, polymer shell and spacer ring in tube-in-tube inner and outer pipes annular space；CX section deformation element is the most chain according to the concavo-convex characteristic of c-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 CX 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, the outer pipe internal surface of its outer surface, but there is a gap.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, 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.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it is characterized in that: CX 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 at least two-point contact, inner surface separates with inner tube outer surface and does not contact.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it is characterised in that: polymer shell is attached on the inner surface of deformation element, and for ensureing effect of heat insulation, polymer shell is to seal, and the polymer shell selecting insulation material to make can improve its heat-insulating property.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, 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 inner tube 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 inner tube.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it is characterised in that: CX section deformation element is formed the most chain by the concavo-convex characteristic of c-type element and X-type element, and has deformation gap at chain place.Deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it is characterised in that: the X-type member top surface in CX section deformation element has the groove of a circle, is used for alleviating own wt or laying monitoring device or heater.
This patent, owing to have employed technique scheme, has the advantage that
1. buckle arrestor main body based on CX 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 the most chain according to the concavo-convex characteristic of c-type and X-type element, space is had at chain place, this gap makes tube-in-tube buckle arrestor deformation element when bending relative motion can occur thus need not bear moment of flexure, there is good flexibility, facilitate tube storage to transport, the stress of bending tube section (such as the upper curved section in S type pipe laying and lower horizontal section) during pipe laying can be effectively reduced, improve pipe laying efficiency.
2. buckle arrestor based on CX section deformation element is installed in tube-in-tube inner and outer pipes annular space, does not increase its external diameter, does 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. buckle arrestor based on CX section deformation element has versatility.Producer only need to produce the deformation element in the CX 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, process without scene during pipe laying, be greatly improved pipe laying efficiency, thus save production management's expense.
4. groove is set on X-type section deformation element, is used for placing Monitoring Pinpelines device, if optical fiber or the temperature sensor of monitoring strain is it can also be used to place pipe heating device.
Accompanying drawing explanation
Fig. 1: be the structural representation that in this utility model, tube-in-tube installs buckle arrestor
Fig. 2: be the schematic cross-section of caryogram anti-bend device in this utility model
Fig. 3: be the structural representation of CX section deformation element in this utility model
Fig. 4: be the another kind of structural representation of CX section deformation element in this utility model
Detailed description of the invention
With embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, tube-in-tube 1 is made up of inner tube 2 and outer tube 4.CX 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, its outer surface and outer tube wall at least two-point contact, and inner surface separates with inner tube outer surface and do not contacts.
As in figure 2 it is shown, the central shaft of tube-in-tube 1 is AA.In the annular space 6 of inner tube 2 and outer tube 4, it is mounted with caryogram buckle arrestor described in the utility model.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 tube-in-tube 1, spacer ring 7 will be installed at a certain distance.Spacer ring 7 defines the axial length of buckle arrestor.The inner surface of spacer ring 7 fix (welding or other fixed forms) on inner tube 2 outer surface 14, there is a gap 8 and make outer tube 4 can be inserted in inner tube 2 in outer surface and outer tube 4 inner surface 12.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 inner tube 2 to ensure the heat-insulating property of pipeline.
The material of polymer shell 15 is typically the polymer with 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 inner tube 2 of polymer shell 15.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 the polymer shell selecting insulation material to make can improve its heat-insulating property.
The core main body of buckle arrestor is made up of one or more deformation elements 10, is formed the most chain by the concavo-convex characteristic of c-type element and X-type element, and has deformation gap 20 at chain place.Realize slightly deforming by gap 20, himself can bear radial pressure thus prevent the propagation of flexing.The outer surface 11 of deformation element 10 and inner surface 12 at least 2 point cantact of outer tube 4, the most all contact, 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, c-type element 18 and the core main body of the mutual chain composition 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 when tube-in-tube pipe laying auxiliary deformation, reduce the moment of flexure of held hands.
As shown in Figure 4, the X-type member top surface (or other surfaces) in CX section deformation element 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 the method for design 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.
Claims (7)
1. deep water pipe-in-pipe buckle arrestor based on CX section deformation element, it adds the caryogram buckle arrestor being made up of CX section deformation element, polymer shell and spacer ring in tube-in-tube inner and outer pipes annular space；CX section deformation element is the most chain according to the concavo-convex characteristic of c-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 CX 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, the outer pipe internal surface of its outer surface, but there is a gap.
2. deep water pipe-in-pipe buckle arrestor based on CX 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. deep water pipe-in-pipe buckle arrestor based on CX section deformation element as claimed in claim 1 or 2, it is characterized in that: CX 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 at least two-point contact, inner surface separates with inner tube outer surface and does not contact.
4. deep water pipe-in-pipe buckle arrestor based on CX 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 the polymer shell selecting insulation material to make can improve its heat-insulating property.
5. deep water pipe-in-pipe buckle arrestor based on CX 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 inner tube 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 inner tube.
6. deep water pipe-in-pipe buckle arrestor based on CX section deformation element as claimed in claim 1 or 2, it is characterised in that: CX section deformation element is formed the most chain by the concavo-convex characteristic of c-type element and X-type element, and has deformation gap at chain place.
7. deep water pipe-in-pipe buckle arrestor based on CX section deformation element as claimed in claim 1 or 2, it is characterized in that: the X-type member top surface in CX section deformation element has the groove of a circle, be used for alleviating own wt or laying monitoring device or heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620058870.9U CN205745646U (en) | 2016-01-21 | 2016-01-21 | Based on CX section deformation element deep water pipe-in-pipe buckle arrestor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620058870.9U CN205745646U (en) | 2016-01-21 | 2016-01-21 | Based on CX section deformation element deep water pipe-in-pipe buckle arrestor |
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| CN205745646U true CN205745646U (en) | 2016-11-30 |
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| CN201620058870.9U Expired - Fee Related CN205745646U (en) | 2016-01-21 | 2016-01-21 | Based on CX section deformation element deep water pipe-in-pipe buckle arrestor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485427A (en) * | 2016-01-21 | 2016-04-13 | 中国石油大学(北京) | Deepwater pipe-in-pipe buckle arrestor based on CX section deformation elements |
| CN108119708A (en) * | 2018-01-17 | 2018-06-05 | 哈尔滨工程大学 | A kind of non-adherent compliant riser drum section interlocks resistance to compression armor |
| CN112901866A (en) * | 2021-02-01 | 2021-06-04 | 中国石油大学(北京) | Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose |
-
2016
- 2016-01-21 CN CN201620058870.9U patent/CN205745646U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485427A (en) * | 2016-01-21 | 2016-04-13 | 中国石油大学(北京) | Deepwater pipe-in-pipe buckle arrestor based on CX section deformation elements |
| CN108119708A (en) * | 2018-01-17 | 2018-06-05 | 哈尔滨工程大学 | A kind of non-adherent compliant riser drum section interlocks resistance to compression armor |
| CN108119708B (en) * | 2018-01-17 | 2023-12-08 | 哈尔滨工程大学 | Non-bonding flexible riser I-shaped section interlocking compression-resistant armor layer |
| CN112901866A (en) * | 2021-02-01 | 2021-06-04 | 中国石油大学(北京) | Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose |
| CN112901866B (en) * | 2021-02-01 | 2021-11-16 | 中国石油大学(北京) | Profiled bar and compression-resistant armor layer for marine non-bonded composite flexible hose |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20170121 |