CN202901534U - Deepwater submarine pipeline buckle arrestor - Google Patents
Deepwater submarine pipeline buckle arrestor Download PDFInfo
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- CN202901534U CN202901534U CN 201220545223 CN201220545223U CN202901534U CN 202901534 U CN202901534 U CN 202901534U CN 201220545223 CN201220545223 CN 201220545223 CN 201220545223 U CN201220545223 U CN 201220545223U CN 202901534 U CN202901534 U CN 202901534U
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- submarine pipeline
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- buckle arrestor
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Abstract
The utility model relates to a deepwater submarine pipeline buckle arrestor which is characterized by comprising a buckle arrestor body, wherein the buckle arrestor body is a cylindrical shell body, the inner diameter of the buckle arrestor body is smaller than the inner diameter of the submarine pipeline, and the outer diameters of the buckle arrestor body are divided into two first steps, two second steps and a third step in sequence according to sizes. The third step is located on the middle portion of the buckle arrestor body, the second steps are both arranged on the two sides of the third step, and the first steps are both arranged on the other sides of the two second steps. The outer diameter of each first step is smaller than the inner diameter of the submarine pipeline, the outer diameter of each second step is the same as the outer diameter of the submarine pipeline, and the outer diameter of the third step is greater than the outer diameter of the submarine pipeline. According to the deepwater submarine pipeline stopping and bending device, a complicated technology is not needed in the welding process, and the first steps can be used as a cushion in welding the submarine pipeline, therefore not only is the improvement of the welding quality of the submarine pipeline facilitated, but also the improvement of the buckling performance of the deepwater submarine pipeline stopping and bending device is facilitated. The deepwater submarine pipeline buckle arrestor has high buckling performance when being used in deepwater environment and the difficulty in welding is cut down, and thus the buckle arrestor can be widely used in the submarine pipeline in the deepwater environment.
Description
Technical field
The utility model relates to a kind of buckle arrestor, particularly about a kind of buckle arrestor that is connected with the deep water submarine pipeline.
Background technique
Submarine pipeline is oil gas transfer ways important in the Offshore Engineering, and its safe operation is the key of guaranteeing that offshore oil and gas production is carried out smoothly.The deep water submarine pipeline will bear huge hydrostatic pressure because its laying marine site depth of water is larger.Deep underwater pipes is tiled in the bump that weights such as may suffering anchor on the sea bed falls, and this will cause the geometrical defect of self; The low temperature environment of deep water consists of the pipeline internal-external temperature difference with the interior deep fat liquid of carrying of pipe, can make pipeline produce axial deformation; Irrational operation may cause that the curved segment moment of flexure of hanging down is excessive in the pipe laying process; Special ocean environment and conveying liquid may consist of local etching to pipeline.More than all factors all may cause the cripling conquassation of deep underwater pipes.After the conquassation of pipeline generation cripling, if outer hydraulic pressure surpasses certain pressure, the conquassation form of pipeline will spread to both sides along the pipe range direction, cause the destruction of whole piece pipeline, this phenomenon is exactly the buckle propagation phenomenon, and keeping the needed minimum pressure outside of pipeline buckle propagation is exactly buckle propagation pressure.
Buckle propagation is in case generation will make its termination, and then will possess one of following two conditions: external pressure is down to below the buckle propagation pressure, and perhaps buckle propagation suffers the physical obstacle that it can't pass through.Because the buckle propagation pressure of pipeline generally is significantly less than its flexing collapse pressure, from previous condition, design pipeline take buckle propagation pressure as the stability Design criterion, make the suffered external pressure of pipeline always be lower than its buckle propagation pressure, this will make the wall thickness of pipeline greatly increase, and obviously be very uneconomic.Therefore, effective physical obstacle is set, stops buckle propagation, become the Main Means of reply pipeline buckle propagation problem.The structure of this inhibition buckle propagation is exactly buckle arrestor.
Effectively buckle arrestor can successfully prevent flexing along the propagation of pipeline axial, and the flexing conquassation that pipeline is occurred occurs over just between two buckle arrestors, thereby avoids the whole piece pipeline to wreck.The citation form of buckle arrestor is a thick ring, and current buckle arrestor commonly used can be divided into the formula of buckling into, wrap style and integrated buckle arrestor according to the difference of installation form.The formula buckle arrestor of buckling into is screwed into first the pipeline specified position and then directly clamps, the wrap style buckle arrestor twines at the specified position of pipeline, the internal diameter of integrated buckle arrestor is the same with the internal diameter of pipeline, and the wall ratio pipeline is thicker, and both weld in the joint afterwards at coaxial sequencing.On the basis that buckles into the formula buckle arrestor, its with pipeline between be connected and increased the twice weld seam, can form the welding type buckle arrestor.On the anti-bend performance, the anti-bend effect of integrated buckle arrestor is best, but higher to welding process requirement, complexity is installed, and weight is heavier.Buckle into formula and the welding type buckle arrestor is simple in structure, easily manufactured, but anti-bend efficient is lower, is not suitable for deep underwater pipes.The situation of wrap style buckle arrestor with buckle into formula buckle arrestor broadly similar, also be unsuitable for deep underwater pipes and use.
Although above-mentioned three kinds of submarine pipeline bending arrestors commonly used are arranged on the engineering, wrap style, buckle into the protection that formula (comprising extended welding type) buckle arrestor mostly is used for the shallow water submarine pipeline, be not suitable for the deep water engineering.At present the submarine pipeline bending arrestor form of deep water engineering commonly used is more single, and only integrated buckle arrestor is a kind of, although and integrated buckle arrestor is simple in structure, need wielding neck, this point is very high to welding process requirement.When bending deformation propagates into the buckle arrestor front end, because deep water buckle arrestor wall thickness is larger, before and after passing through, buckle propagation significant distortion can not occur, this will produce very strong bending and axial force to buckle arrestor front end weld seam, and the force environment of this complexity requires higher than the weldquality of general mesohigh pressurized container.Correspondingly, the possibility that destruction appears in weld seam is also just very large, and light damage only is that weld seam trachoma is communicated with, and small-sized seepage occurs under the acting in conjunction of hydraulic pressure and interior pressure outside; Crack even breach can appear in the weld joint during heavy damage, and this will cause serious leakage accident.Therefore it is very necessary to design the lower deep underwater pipes buckle arrestor of a kind of welding quality requirement.
Summary of the invention
For the problems referred to above, the purpose of this utility model provides a kind of pipeline welding quality that both had been conducive to improve, the deep water submarine pipeline bending arrestor that has again higher anti-bend ability.
For achieving the above object, the utility model is taked following technological scheme: a kind of deep water submarine pipeline bending arrestor, it is characterized in that: it comprises the buckle arrestor body, described buckle arrestor body is cylindrical shell, the internal diameter of described buckle arrestor body is less than the internal diameter of submarine pipeline, and the external diameter of described buckle arrestor body is divided into first order ladder, second level ladder and third level ladder successively according to order from small to large; Described third level ladder is positioned at the middle part of described buckle arrestor body, and the both sides of described third level ladder are described second level ladder, and the opposite side of two described second level ladders is first order ladder; The external diameter of described first order ladder is less than the internal diameter of described submarine pipeline, and the external diameter of described second level ladder is identical with the external diameter of described submarine pipeline, and the external diameter of described third level ladder is greater than the external diameter of described submarine pipeline.
The length of the first order ladder of described buckle arrestor body is the external diameter of 0.25 times described submarine pipeline; The wall thickness of described first order ladder is the wall thickness of 1～2 times described submarine pipeline; The external diameter of described first order ladder is than the little 0.5～2mm of internal diameter of described submarine pipeline, and the end position that described first order ladder inserts described submarine pipeline is processed into 30 ° mild slope angle.
The length of the second level ladder of described buckle arrestor body is the external diameter of 0.25 times described submarine pipeline; The wall thickness of described second level ladder is the wall thickness of 2～3 times described submarine pipeline; The internal diameter of described second level ladder is consistent with the internal diameter of described first order ladder; The joint of described second level ladder and described first order ladder is the weld with described submarine pipeline, and described second level ladder is opened groove at 45 ° near the end of weld seam.
The length of the third level ladder of described buckle arrestor body is the external diameter of 0.5 times described submarine pipeline; The wall thickness of described third level ladder is the wall thickness of 3～5 times described submarine pipeline; The internal diameter of described third level ladder is consistent with the internal diameter of described first order ladder.
The utility model is owing to take above technological scheme, it has the following advantages: 1, the utility model is compared with the integrated buckle arrestor that is usually used in deep water, in distribution of material remarkable difference is arranged, the all material of integrated buckle arrestor is distributed in the zone beyond the submarine pipeline internal diameter, and two first order ladders of the present utility model insert respectively in the submarine pipeline, and its material has 30%～50% to be distributed in the submarine pipeline internal diameter with interior zone approximately; For cylindrical shell, radius-thickness ratio is less, and anti-flexural property is better; Therefore, under the prerequisite of equivalent material, this distribution of material mode of the present utility model will improve its anti-bend ability.2, the utility model has overcome the deficiency of deep water with integrated buckle arrestor welding requirements complexity: whole buckle arrestor requires the buckle arrestor internal diameter to equate with internal diameter of the pipeline, implements wielding neck during installation; The deep underwater pipes buckle arrestor requires to have higher anti-bend efficient, corresponding integrated buckle arrestor wall thickness is larger, significant distortion does not occur when passing through, this is so that bending deformation when propagating into the buckle arrestor front end, very large bending and axial force can be born in buckle arrestor front end weld joint, are easy to failure; First order ladder of the present utility model stretches into submarine pipeline inside, and buckle propagation is near submarine pipeline, and first order ladder will be to the zone reach that is subject to than macrobending and axial force, and the butt welded seam place plays a protective role.3, the utility model is in the welded and installed process, and the existence of first order ladder also can be used as the mat of welding, so that it is lower to obtain the operation easier of better welding quality.4, the 3rd step wall thickness of the present utility model is larger, and its external diameter is greater than the submarine pipeline external diameter, and internal diameter is the strongest zone of the utility model hoop rigidity less than the submarine pipeline internal diameter, is the core of the utility model anti-bend ability; By the transition of the utility model the first two step, the advantage of the large wall thickness of the utility model can not be subjected to the weldquality puzzlement to obtain performance, and the wall thickness larger than integrated buckle arrestor can be set, and therefore, the utility model can use in super deepwater environment.5, the utility model when even destroying appears in weld seam, owing to the existence of first order ladder, can limit the leakage rate of submarine pipeline in worst situation, reduces the consequence that may bring.6, the end position of first order ladder insertion submarine pipeline of the present utility model has carried out 30 ° of slope angles processing, therefore, can reduce the interference to the submarine pipeline fluid flow inside, also is convenient to the work of wiper simultaneously.Welding process of the present utility model does not need complicated technological requirement, and the mat when first order ladder of the present utility model can be used as with the submarine pipeline butt welding, both be conducive to improve the welding quality of submarine pipeline, be beneficial to again the anti-bend ability of the present utility model that improves; The utility model has higher anti-bend performance than integrated buckle arrestor when deepwater environment uses, and has greatly cut down the welding difficulty of integrated buckle arrestor, can be widely used on the submarine pipeline in the deepwater environment.
Description of drawings
Fig. 1 is the perspective view of facing that the utility model is used in certain section submarine pipeline
Fig. 2 is the A-A schematic cross-section shown in Fig. 1
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 buckle arrestor body 1, buckle arrestor body 1 is cylindrical shell, the internal diameter of buckle arrestor body 1 is less than the internal diameter of submarine pipeline 2, the external diameter of buckle arrestor body 1 is different, is divided into successively first order ladder 3, second level ladder 4 and third level ladder 5 according to from small to large order.Third level ladder 5 is positioned at the middle part of buckle arrestor body 1, and the opposite side that the both sides of third level ladder 5 are 4, two second level ladders 4 of second level ladder is first order ladder 3.Simultaneously, the external diameter of first order ladder 3 is less than the internal diameter of submarine pipeline 2, and the external diameter of second level ladder 4 is identical with the external diameter of submarine pipeline 2, and the external diameter of third level ladder 5 is greater than the external diameter of submarine pipeline 2.
As shown in Figure 1, the length of the first order ladder 3 of the utility model buckle arrestor body 1 is the external diameter of 0.25 times submarine pipeline 2; The wall thickness of first order ladder 3 is the wall thickness of 1～2 times submarine pipeline 2; The internal diameter of first order ladder 3 is less than the internal diameter of submarine pipeline 2; The external diameter of first order ladder 3 is convenient to insert smoothly when mounted submarine pipeline 2 inside than the little 0.5～2mm of internal diameter of submarine pipeline 2.The end position that first order ladder 3 inserts submarine pipeline 2 is processed into 30 ° mild slope angle, is convenient to Fluid Flow in A and pigging operation in the submarine pipeline 2.
As shown in Figure 1, the length of the second level ladder 4 of the utility model buckle arrestor body 1 is the external diameter of 0.25 times submarine pipeline 2; The wall thickness of second level ladder 4 is the wall thickness of 2～3 times submarine pipeline 2; The internal diameter of second level ladder 4 is less than the internal diameter of submarine pipeline 2, and consistent with the internal diameter of first order ladder 3; The external diameter of second level ladder 4 is consistent with the external diameter of submarine pipeline 2.The joint of second level ladder 4 and first order ladder 3 is the weld with submarine pipeline 2, and second level ladder 4 is opened groove at 45 ° near the end of weld seams 6, is used for the wielding neck with submarine pipeline 2.
As shown in Figure 1, the length of the third level ladder 5 of the utility model buckle arrestor body 1 is the external diameter of 0.5 times submarine pipeline 2; The wall thickness of third level ladder 5 is the wall thickness of 3～5 times submarine pipeline 2; The internal diameter of third level ladder 5 is less than the internal diameter of submarine pipeline 2, and consistent with the internal diameter of first order ladder 3; The external diameter of third level ladder 5 is greater than the external diameter of submarine pipeline 2.
Material of the present utility model can adopt and the API 5L X65 type of deep water submarine pipeline 2 identical materials or more high-grade X70, X80 grade steel; Its main function is to prevent the buckle propagation of submarine pipeline 2 under complex environment and load, guarantees the safety of whole piece pipeline.
Fabrication and installation method of the present utility model may further comprise the steps.
When 1) carrying out engineering application of the present utility model, should select wall thickness to reach the wall thickness of third level ladder 5, external diameter is consistent with the external diameter of third level ladder 5 or approaching, and the suitable pipe fitting of material, and cutting obtains the blank of the length of 1.5 times of submarine pipeline 2 diameters.
2) process as shown in Figure 1 many steps cylindrical shell pattern and 60 ° of slope angles at lathe or milling machine.Consider that bevel for welding will open at the pipe laying scene, therefore, when making the utility model, the transition slope angle between second level ladder 4 and the first order ladder 3 should be made and be a bit larger tham this angle, advises more than 60 °.
3) during pipe laying, two first order ladders 3 of the present utility model are inserted respectively in two submarine pipelines 2, submarine pipeline 2 contrapositions with two ends, take first order ladder 3 as liner, implement the wielding neck under the liner condition, coastal bottom pipeline 2 is axially decided on the depth of water, environment and every pipe fitting length every 50～100m() the utility model is set.
The various embodiments described above only are used for explanation the utility model; wherein the structure of each parts, Placement etc. all can change to some extent; every equivalents and improvement of carrying out on the basis of technical solutions of the utility model all should do not got rid of outside protection domain of the present utility model.
Claims (5)
1. deep water submarine pipeline bending arrestor, it is characterized in that: it comprises the buckle arrestor body, described buckle arrestor body is cylindrical shell, the internal diameter of described buckle arrestor body is less than the internal diameter of submarine pipeline, and the external diameter of described buckle arrestor body is divided into first order ladder, second level ladder and third level ladder successively according to order from small to large; Described third level ladder is positioned at the middle part of described buckle arrestor body, and the both sides of described third level ladder are described second level ladder, and the opposite side of two described second level ladders is first order ladder; The external diameter of described first order ladder is less than the internal diameter of described submarine pipeline, and the external diameter of described second level ladder is identical with the external diameter of described submarine pipeline, and the external diameter of described third level ladder is greater than the external diameter of described submarine pipeline.
2. a kind of deep water submarine pipeline bending arrestor as claimed in claim 1, it is characterized in that: the length of the first order ladder of described buckle arrestor body is the external diameter of 0.25 times described submarine pipeline; The wall thickness of described first order ladder is the wall thickness of 1～2 times described submarine pipeline; The external diameter of described first order ladder is than the little 0.5～2mm of internal diameter of described submarine pipeline, and the end position that described first order ladder inserts described submarine pipeline is processed into 30 ° mild slope angle.
3. a kind of deep water submarine pipeline bending arrestor as claimed in claim 1, it is characterized in that: the length of the second level ladder of described buckle arrestor body is the external diameter of 0.25 times described submarine pipeline; The wall thickness of described second level ladder is the wall thickness of 2～3 times described submarine pipeline; The internal diameter of described second level ladder is consistent with the internal diameter of described first order ladder; The joint of described second level ladder and described first order ladder is the weld with described submarine pipeline, and described second level ladder is opened groove at 45 ° near the end of weld seam.
4. a kind of deep water submarine pipeline bending arrestor as claimed in claim 2, it is characterized in that: the length of the second level ladder of described buckle arrestor body is the external diameter of 0.25 times described submarine pipeline; The wall thickness of described second level ladder is the wall thickness of 2～3 times described submarine pipeline; The internal diameter of described second level ladder is consistent with the internal diameter of described first order ladder; The joint of described second level ladder and described first order ladder is the weld with described submarine pipeline, and described second level ladder is opened groove at 45 ° near the end of weld seam.
5. as claimed in claim 1 or 2 or 3 or 4 a kind of deep water submarine pipeline bending arrestor, it is characterized in that: the length of the third level ladder of described buckle arrestor body is the external diameter of 0.5 times described submarine pipeline; The wall thickness of described third level ladder is the wall thickness of 3～5 times described submarine pipeline; The internal diameter of described third level ladder is consistent with the internal diameter of described first order ladder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220545223 CN202901534U (en) | 2012-10-23 | 2012-10-23 | Deepwater submarine pipeline buckle arrestor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220545223 CN202901534U (en) | 2012-10-23 | 2012-10-23 | Deepwater submarine pipeline buckle arrestor |
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| Publication Number | Publication Date |
|---|---|
| CN202901534U true CN202901534U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220545223 Expired - Lifetime CN202901534U (en) | 2012-10-23 | 2012-10-23 | Deepwater submarine pipeline buckle arrestor |
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| CN (1) | CN202901534U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943925A (en) * | 2012-10-23 | 2013-02-27 | 中国海洋石油总公司 | Deepwater subsea pipeline flexion stopper |
| CN105443866A (en) * | 2014-11-03 | 2016-03-30 | 中国石油大学(北京) | Deepwater pipe-in-pipe buckle arrestor based on C-shaped section deformation elements |
| CN112161121A (en) * | 2020-11-02 | 2021-01-01 | 杨新超 | Pressure-resistant double-layer conveying pipeline |
-
2012
- 2012-10-23 CN CN 201220545223 patent/CN202901534U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943925A (en) * | 2012-10-23 | 2013-02-27 | 中国海洋石油总公司 | Deepwater subsea pipeline flexion stopper |
| CN105443866A (en) * | 2014-11-03 | 2016-03-30 | 中国石油大学(北京) | Deepwater pipe-in-pipe buckle arrestor based on C-shaped section deformation elements |
| CN105443866B (en) * | 2014-11-03 | 2018-09-18 | 中国石油大学(北京) | One kind being based on C-shaped cross section deformation element deep water pipe-in-pipe buckle arrestor |
| CN112161121A (en) * | 2020-11-02 | 2021-01-01 | 杨新超 | Pressure-resistant double-layer conveying pipeline |
| CN112161121B (en) * | 2020-11-02 | 2022-07-01 | 东营新达德安新材料科技有限责任公司 | Pressure-resistant double-layer conveying pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130424 Effective date of abandoning: 20150121 |
|
| RGAV | Abandon patent right to avoid regrant |