CN102840395A - Dual-layer heat-preserving weight-balancing submarine pipeline - Google Patents
Dual-layer heat-preserving weight-balancing submarine pipeline Download PDFInfo
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- CN102840395A CN102840395A CN2012103158234A CN201210315823A CN102840395A CN 102840395 A CN102840395 A CN 102840395A CN 2012103158234 A CN2012103158234 A CN 2012103158234A CN 201210315823 A CN201210315823 A CN 201210315823A CN 102840395 A CN102840395 A CN 102840395A
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- balancing
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Abstract
The invention discloses a dual-layer heat-preserving weight-balancing submarine pipeline, which consists of an inner tube, an outer tube, an anti-corrosion layer, a heat-preserving layer, a concrete weight-balancing layer, spacing strips and an annular steel bar, wherein the heat-preserving layer is filled between the inner tube and the outer tube; the anti-corrosion layer is coated on the outer tube; and 5-8 spacing strips are arranged between the inner tube and the outer tube, and are connected in series by using the annular steel bar. The dual-layer heat-preserving weight-balancing submarine pipeline is adopted in a sandy seabed with severe environmental conditions, and can meet the requirements of heat-preserving property, strength and stability. When the dual-layer heat-preserving weight-balancing submarine pipeline is applied to a sea area with reef areas, the outer pipe can be effectively protected. The dual-layer heat-preserving weight-balancing submarine pipeline can bear certain falling object impact in areas where human beings act frequently.
Description
Technical field
The invention belongs to double-layer heat insulation counterweight submarine pipeline.
Background technique
Because condensation point of crude oil is higher, so the submarine pipeline of oil transportation or mixed transportation of oil and gas generally all need be incubated processing.At present, the oil transportation that offshore oil and gas field adopted or the submarine pipeline of mixed transportation of oil and gas are generally individual layer insulation counterweight pipe, double layer heat preservation pipe etc.At the comparatively abominable sand matter sea-bed area of environmental conditions; As adopt individual layer to be incubated the counterweight pipe; In order to improve its stability, need thicker concrete weighted coating, thereby cause the pipeline unit weight bigger; And when pipe laying, bear the inner layer steel pipe that has only of deadweight, so its intensity possibly be difficult to meet the demands; Simultaneously, it is a difficult problem that the joint of individual layer counterweight pipe is handled always, thereby exists poor sealing to cause the risk of insulation failure.As adopt double layer heat preservation pipe, when pipe laying inside and outside two-layer steel pipe all can bear deadweight, lay strength problem though can solve it, thereby increase thickness of steel pipe in order to improve the pipeline stability, be a kind of uneconomic way; Simultaneously, for blocked up steel pipe, its welding performance and efficient are also lower.
Shallow water marine site in the reef district, the floating method of dragging of general employing is carried out pipe laying.As adopt individual layer insulation counterweight pipe, and because having in the joint, this pipeline do not coagulate native weight coating protection, possibly in dilatory process, cause joint impaired.As adopting the bimetallic tube thermal insulation pipe, its outer layer pipe directly contacts with reef, also possibly cause impaired.
Summary of the invention
The purpose of this invention is to provide a kind of double-layer heat insulation counterweight submarine pipeline, is a kind of oil transportation or mixed transportation of oil and gas submarine pipeline of new type section form, can satisfy the needs of pipe insulation effect, stability and protection outer tube.
The present invention is made up of interior pipe, outer tube, anticorrosive coat, thermal insulation layer, concrete weighted coating, spacer bar, circumferential reinforcement; Filling heat insulating wall between interior pipe and outer tube; Apply anticorrosive coat on the outer tube, 5～8 spacer bars are set between interior pipe and outer tube, spacer bar is connected with circumferential reinforcement.
The nominal diameter of pipe and outer tube differs about 50mm in described, to guarantee that its gap is greater than insulation layer thickness.
The thickness of described thermal insulation layer is 40mm; The about 3mm of anticorrosive coat thickness; The concrete weight coating layer thickness generally is not less than 400mm.
The present invention adopts in the comparatively abominable sand matter sea bed of environmental conditions, can satisfy heat insulating ability, intensity and stability requirement.The thermal insulation layer of at first, filling between the outer and inner tube has been guaranteed the heat insulation effect of pipeline; Secondly, interior pipe and outer tube are steel tubing, when pipe laying, can bear self weight of pipeline simultaneously, and thin wall thickness can satisfy requirement of strength; Once more, through being arranged on outermost concrete weighted coating, effectively satisfied the stability requirement of pipeline.
In the marine site in reef district, adopt and to invent, can effectively protect its outer tube.Because outer tube outer surface has the protection of concrete weighted coating, avoided in the pipe laying process, owing to outer tube and reef directly contact cause impaired.
Adopt this invention in the comparatively frequent zone of mankind's activity, also bear certain junk and impact.Generally there is higher junk risk in these zones, adopt this invention, and its outermost concrete weighted coating can be kept out certain junk impact load.
Description of drawings
Fig. 1 is a longitudinal sectional drawing of the present invention;
Fig. 2 is a view in transverse section of the present invention.
Embodiment
Like Fig. 1, shown in 2, because interior pipe 1 is by outer tube 2 seal protections, and outer tube 2 directly contacts with seawater, therefore in pipe 1 need not carry out preservative treatment, and in directly thermal insulation layer 4 being wrapped on the pipe 1, generally the thickness of thermal insulation layer 4 is 40mm; 2 anticorrosive coats 3 that need to apply the about 3mm of a layer thickness of outer tube.Outer tube 2 increases concrete weighted coating 5 above that after applying and finishing, and its thickness is confirmed according to calculating, generally is not less than 400mm.Must guarantee the combination force between anticorrosive coat 3 and the concrete weighted coating 5, in order to avoid peel off in laying and using process.When selecting the caliber of interior pipe 1 and outer tube 2, need to guarantee that the two nominal diameter differs about 50mm, to guarantee that its gap is greater than thermal insulation layer 4 thickness.For big variation does not take place with the relative position of outer tube 2 on axial direction in pipe 1 in making, need 5～8 spacer bars 6 are set between the two, spacer bar 6 usefulness circumferential reinforcements 7 are together in series, be wrapped in around the interior pipe 1.The interior pipe that has wrapped up thermal insulation layer 4 and spacer bar 61 insertion has been applied anticorrosive coat 3 and has been provided with the outer tube 2 of concrete weighted coating 5 and fixes, and double-layer heat insulation counterweight pipe promptly completes.
Claims (3)
1. double-layer heat insulation counterweight submarine pipeline; Form by interior pipe, outer tube, anticorrosive coat, thermal insulation layer, concrete weighted coating, spacer bar, circumferential reinforcement; It is characterized in that filling heat insulating wall (4) between interior pipe (1) and outer tube (2); Outer tube (2) is gone up and is applied anticorrosive coat (3), between interior pipe (1) and outer tube (2), 5～8 spacer bars (6) is set, and spacer bar (6) is connected with circumferential reinforcement (7).
2. a kind of double-layer heat insulation counterweight submarine pipeline according to claim 1 when it is characterized in that selecting the caliber of interior pipe (1) and outer tube (2), needs to guarantee that the two nominal diameter differs about 50mm, to guarantee that its gap is greater than thermal insulation layer (4) thickness.
3. a kind of double-layer heat insulation counterweight submarine pipeline according to claim 1, the thickness that it is characterized in that thermal insulation layer (4) is 40mm; The about 3mm of anticorrosive coat (3) thickness; Concrete weighted coating (5) thickness generally is not less than 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103158234A CN102840395A (en) | 2012-08-28 | 2012-08-28 | Dual-layer heat-preserving weight-balancing submarine pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103158234A CN102840395A (en) | 2012-08-28 | 2012-08-28 | Dual-layer heat-preserving weight-balancing submarine pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102840395A true CN102840395A (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103158234A Pending CN102840395A (en) | 2012-08-28 | 2012-08-28 | Dual-layer heat-preserving weight-balancing submarine pipeline |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527896A (en) * | 2013-10-12 | 2014-01-22 | 天津大学 | Submarine pipeline protection device with guide plate |
| CN103522408A (en) * | 2013-10-23 | 2014-01-22 | 西南石油大学 | Submarine anti-corrosion pipeline concrete counter weight production line |
| CN103660025A (en) * | 2013-12-06 | 2014-03-26 | 西南石油大学 | Method and system for producing seabed concrete weight balancing anticorrosion pipeline |
| CN106090460A (en) * | 2016-07-01 | 2016-11-09 | 中国石油大学(北京) | A kind of novel seabed oil-gas transportation compound tube |
| CN106764061A (en) * | 2017-02-27 | 2017-05-31 | 佛山科学技术学院 | A kind of offshore oilfield pipeline counterweight Rotating fields and its construction method |
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| CN202834574U (en) * | 2012-08-28 | 2013-03-27 | 中国海洋石油总公司 | Double-layer heat preservation bob-weight submarine pipeline |
-
2012
- 2012-08-28 CN CN2012103158234A patent/CN102840395A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4060263A (en) * | 1975-02-24 | 1977-11-29 | Technigaz | Conduit for conveying a fluid, the temperature of which is different from the surrounding temperature |
| US4338044A (en) * | 1978-12-26 | 1982-07-06 | Shell Oil Company | Prevention of sliding of a weight jacket over the corrosion coating of a pipe line |
| WO2008099150A1 (en) * | 2007-02-12 | 2008-08-21 | Findlay, Jessie | Pipeline with outer weight member |
| US20090000681A1 (en) * | 2007-06-29 | 2009-01-01 | Daniel Averbuch | Reinforced double-walled pipe and manufacturing method |
| US20100287957A1 (en) * | 2009-05-12 | 2010-11-18 | Xuejie Liu | Pipe-in-Pipe in RCC for Subsea Transfer of Cryogenic Fluids |
| CN201621381U (en) * | 2010-02-26 | 2010-11-03 | 武汉理工大学 | Prestressed concrete and glass fiber reinforced plastic composite pipe |
| CN201925614U (en) * | 2010-12-23 | 2011-08-10 | 中国海洋石油总公司 | Submarine anti-corrosion and resistance reducing delivery pipeline |
| CN202074186U (en) * | 2011-05-20 | 2011-12-14 | 大庆鲁冀防腐保温钢管制造有限公司 | Novel outward-sliding type steam pipe |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527896A (en) * | 2013-10-12 | 2014-01-22 | 天津大学 | Submarine pipeline protection device with guide plate |
| CN103522408A (en) * | 2013-10-23 | 2014-01-22 | 西南石油大学 | Submarine anti-corrosion pipeline concrete counter weight production line |
| CN103522408B (en) * | 2013-10-23 | 2015-08-19 | 西南石油大学 | A kind of submarine anti-corrosion pipeline concrete counter weight production line |
| CN103660025A (en) * | 2013-12-06 | 2014-03-26 | 西南石油大学 | Method and system for producing seabed concrete weight balancing anticorrosion pipeline |
| CN103660025B (en) * | 2013-12-06 | 2015-12-02 | 西南石油大学 | The production method of a kind of seabed concrete weight coating anti-corrosion pipeline and system |
| CN106090460A (en) * | 2016-07-01 | 2016-11-09 | 中国石油大学(北京) | A kind of novel seabed oil-gas transportation compound tube |
| CN106764061A (en) * | 2017-02-27 | 2017-05-31 | 佛山科学技术学院 | A kind of offshore oilfield pipeline counterweight Rotating fields and its construction method |
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Application publication date: 20121226 |