CN102434757B - Sealed and waterproof seabed heat-preservation pipe - Google Patents
Sealed and waterproof seabed heat-preservation pipe Download PDFInfo
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- CN102434757B CN102434757B CN 201110409161 CN201110409161A CN102434757B CN 102434757 B CN102434757 B CN 102434757B CN 201110409161 CN201110409161 CN 201110409161 CN 201110409161 A CN201110409161 A CN 201110409161A CN 102434757 B CN102434757 B CN 102434757B
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Abstract
The invention discloses a sealed and waterproof seabed heat-preservation pipe, which comprises a steel pipe, wherein the outer surface of the steel pipe is provided with a corrosion-resisting layer, the outer surface of the corrosion-resisting layer is provided with a heat-preservation layer, the outer surface of the heat-preservation layer is stuck with a covering protection layer, the covering protection layer is formed by a polyurethane elastomer, the polyurethane elastomer covering protection layer is stuck on the heat-preservation layer and the corrosion-resisting layer through a polyurethane base coating agent, the two ends of the polyurethane elastomer covering protection layer are respectively overlaid with the corrosion-resisting layer, the heat-preservation layer is sealed on the steel pipe, and the outer surface of the polyurethane elastomer covering protection layer is provided with a weighting layer. According to the invention, the sticking performance between the polyurethane elastomer covering protection layer and a polyurethane foam heat-preservation layer and the sticking performance between the polyurethane elastomer covering protection and an FBE (Fusion Bonded Epoxy) corrosion-resisting layer are good, the sticking strength is larger than 10 MPa, the sea water can penetrate through the sticking position of the polyurethane elastomer covering protection layer and the polyurethane foam heat-preservation layer and the sticking position of the polyurethane elastomer covering protection and the FBE corrosion-resisting layer, so that the foam heat-preservation layer can be better protected, the waterproof property and the sealability are good, the pressure resisting strength is high, and the heat-preservation effect is good.
Description
Technical field
The present invention relates to a kind of conveyance conduit, particularly relate to a kind of seabed thermal insulation pipe of the water-tight for delivery of ocean deepwater environment Crude Oil or gas medium.
Background technique
In the development process of marine oil gas field, crude oil is carried by pipeline mostly, and the crude exports temperature is higher, and ocean temperature is lower, for avoid crude oil wax deposition to occur in course of conveying, pipeline is blocked in condensation, need to be incubated conveyance conduit.Traditional two steel pipe insulations are filled polyurethane foam layers in the middle of two-layer steel pipe, but this kind heat preserving method steel consumption amount is large, the marine node weld time is long, pipe laying is slow, and whole cost is very high.The single steel pipe thermal-insulated counterweight tubular construction that occurred afterwards is: " pipe+FBE anticorrosive coat+polyurethane foam insulation layer+polyethylene/polyurea/polyurethane elastomer protective coating+weight coating ", the thermal insulation pipe of this kind structure has been saved a large amount of steel expenses and offshore construction expense, but the end of this insulating structure need be installed tarpaulin and be sealed, and prevents thermal insulation layer water inlet inefficacy.Tarpaulin is installed is had following shortcoming:
The adhesion strength of the external protection coating of tarpaulin and above-mentioned thermal insulating material and FBE anticorrosive coat is not high enough, easily peels off with protective coating under certain hydrostatic pressing effect, and water can infiltrate thermal insulation layer.Certain space is arranged between tarpaulin and thermal insulation layer in addition, can break under certain hydrostatic pressing effect and leak, make insulation failure.
Summary of the invention
The present invention provides a kind of seabed thermal insulation pipe of water-tight for solving the technical problem that exists in known technology, this thermal insulation pipe manufacturing process is controlled, waterproof sealing good, compressive strength is high, high insulating effect.
the technological scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of seabed thermal insulation pipe of water-tight, comprise steel pipe, described outer surface of steel tube is provided with anticorrosive coat, described anticorrosive coat outer surface is provided with thermal insulation layer, be bonded with the coating protective coating on described thermal insulation layer outer surface, described coating protective coating is formed by polyurethane elastomer, described polyurethane elastomer coats protective coating and is bonded on described thermal insulation layer and described anticorrosive coat by the polyurethane silane coupling agent, described polyurethane elastomer coating protective coating two end part all overlap with described anticorrosive coat, described thermal insulation layer is sealed on described steel pipe, described polyurethane elastomer coats the protective coating outer surface and is provided with weight coating.
It is to adopt the semi-prepolymer method to form with the mode of die casting or rotary casting that described polyurethane elastomer coats protective coating.
Described polyurethane elastomer coating protective coating hardness Shao A88～92 °, tensile strength 18～25MPa, compressive strength＞5MPa, thick 12～16mm, thermal conductivity＜0.20W/mK is with the adhesion strength 〉=8MPa of epoxy layer.
Described polyurethane elastomer coats on the protective coating outer surface and is formed with groove.
Described anticorrosive coat is the FBE of clinkering.
Described thermal insulation layer is polyurethane foam, density 40～200Kg/m
3, thick 25～60mm, thermal conductivity＜0.040W/mK.
Described weight coating is the concrete layer with steel-mesh reinforced layer.
The length of described coating protective coating two end part and described anticorrosive coat overlap joint is 110～150mm.
The coating thickness of described polyurethane silane coupling agent is 0.05～0.10mm.
Advantage and good effect that the present invention has are: 1) polyurethane elastomer coats protective coating and adopts machine cast (rotary casting or die casting), and technique is controlled; 2) work progress does not have floating pollutant generation, and environment is not had harmful effect; 3) polyurethane elastomer coating protective coating compressive strength is high, greater than 5MPa.4) polyurethane elastomer coating protective coating and polyurethane foam insulation layer and FBE anticorrosive coat adhesive property are good, and adhesion strength is greater than 10MPa; 5) the polyurethane elastomer waterproof sealing is good, and seawater can by polyurethane elastomer and polyurethane elastomer and FBE bonding part infiltration thermal insulation layer, can not protected foam heat-insulation layer well.
Description of drawings
Fig. 1 is sectional drawing of the present invention;
Fig. 2 is sectional view of the present invention.
In figure: 1, steel pipe, 2, anticorrosive coat, 3, thermal insulation layer, 4, adhesive layer, 5, polyurethane elastomer coats protective coating, 6, weight coating, 7, steel-mesh reinforced layer.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
see also Fig. 1～Fig. 2, a kind of seabed thermal insulation pipe of water-tight, comprise steel pipe 1, steel pipe 1 outer surface is provided with anticorrosive coat 2, anticorrosive coat 2 outer surfaces are provided with thermal insulation layer 3, be bonded with the coating protective coating on the thermal insulation layer outer surface, coating protective coating is formed by polyurethane elastomer, polyurethane elastomer coats protective coating 5 and is bonded on thermal insulation layer 3 and anticorrosive coat 2 by the polyurethane silane coupling agent, polyurethane elastomer coating protective coating 5 two end part all overlap with anticorrosive coat 2, thermal insulation layer 3 is sealed on steel pipe 1, polyurethane elastomer coats protective coating 5 outer surfaces and is provided with weight coating 6.
Manufacture method of the present invention:
1) steel pipe 1 outer surface is carried out derusting by sandblasting, reach the Sa2.5 level.
2) adopt clinkery epoxy powder to carry out bottom anticorrosion, form anticorrosive coat 2, thickness 300～600 μ m of anticorrosive coat 2.
3) carry out polyurethane foam on the steel pipe 1 that scribbles epoxy coating, make thermal insulation layer 3, foam density 40～200Kg/m
3, insulation bed thickness 25～60mm, thermal conductivity＜0.040W/mK.The mould of making foam can adopt the steel die that scribbles teflon, need not releasing agent, guarantees that polyurethane surface is without greasy dirt; The mould of making foam also adopts the plain carbon steel molding jig, at mould inner surface lay polyethylene film, need not releasing agent, guarantees that polyurethane surface is without greasy dirt.
4) remove the dirts such as greasy dirt, water, dust on epoxy surface and polyurethane foam surface.
5) form adhesive layer 4 at polyurethane surface and epoxy external coating polyurethane silane coupling agent, increase the cohesive force on polyurethane elastomer and polyurethane foam and epoxy surface, eliminate the stress between polyurethane elastomer and foam, the thickness of adhesive layer: 0.05～0.1mm.
6) carry out the polyurethane elastomer cast on the surface that scribbles the polyurethane silane coupling agent, the polyurethane of cast is coated on polyurethane foam on steel pipe fully, and polyurethane elastomer adopts the mode of mould-forming or rotary casting to be coated on polyurethane foam and epoxy coating is surperficial.The lap width of polyurethane elastomer and epoxy is 110～150mm, to guarantee the thermal insulation layer good seal.Polyurethane elastomer is to adopt the moulding of semi-prepolymer method, and raw material is A, B component, and the A component is semi-prepolymer, and the B component is the mixture of polyether polyol and the auxiliary agents such as little molecule glycol and catalyzer.During cast, die temperature is 60 ℃, 35～50 ℃ of material temperatures, curing time 15～30min.Polyurethane elastomer hardness Shao A88～92 °, tensile strength 18～25MPa, compressive strength＞5MPa, thick 15mm, thermal conductivity＜0.20W/mK is with the adhesion strength 〉=8MPa of epoxy layer.
7) when polyurethane elastomer does not solidify fully, at its surface etch groove, groove width 3～5mm; pitch of grooves 2～4mm; groove depth 1.5～3mm can be good at sticking together to guarantee concrete and polyurethane elastomer, and the integral anti-shearing that increases simultaneously pipeline is cut ability.Above-mentioned groove can be spiral chute, can be also to be the groove of rectangle at the elastic polyurethane external surface along a plurality of cross sections of its circumferential arrangement.
8) in the elastic polyurethane surface by spraying or fashion of extrusion carries out the coating of concrete weighted coating, form a kind of concrete weighted coating 6 with some strength and weight, wherein, be provided with steel-mesh reinforced layer 7 in described concrete weighted coating 6.
Although the above is described the preferred embodiments of the present invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (10)
1. the seabed thermal insulation pipe of a water-tight, is characterized in that, comprises steel pipe,
Described outer surface of steel tube is provided with anticorrosive coat,
Described anticorrosive coat outer surface is provided with thermal insulation layer,
Be bonded with the coating protective coating on described thermal insulation layer outer surface, described coating protective coating is formed by polyurethane elastomer, described polyurethane elastomer coats protective coating and is bonded on described thermal insulation layer and described anticorrosive coat by the polyurethane silane coupling agent, described polyurethane elastomer coating protective coating two end part all overlap with described anticorrosive coat, described thermal insulation layer is sealed on described steel pipe
Described polyurethane elastomer coats the protective coating outer surface and is provided with weight coating.
2. the seabed thermal insulation pipe of water-tight according to claim 1, is characterized in that, it is to adopt the semi-prepolymer method to form with the mode of die casting or rotary casting that described polyurethane elastomer coats protective coating.
3. the seabed thermal insulation pipe of water-tight according to claim 1, it is characterized in that, described polyurethane elastomer coating protective coating hardness Shao A88～92 °, tensile strength 18～25MPa, compressive strength＞5MPa, thick 12～16mm, thermal conductivity＜0.20W/mK is with the adhesion strength 〉=8MPa of epoxy layer.
4. the seabed thermal insulation pipe of water-tight according to claim 1, is characterized in that, described polyurethane elastomer coats on the protective coating outer surface and is formed with groove.
5. the seabed thermal insulation pipe of water-tight according to claim 4, is characterized in that, the groove width 3～5mm of described groove, pitch of grooves 2～4mm, groove depth 1.5～3mm.
6. the seabed thermal insulation pipe of water-tight according to claim 1, is characterized in that, described anticorrosive coat is the FBE of clinkering.
7. the seabed thermal insulation pipe of water-tight according to claim 1, is characterized in that, described thermal insulation layer is polyurethane foam, density 40～200Kg/m
3, thick 25～60mm, thermal conductivity＜0.040W/mK.
8. the seabed thermal insulation pipe of water-tight according to claim 1, is characterized in that, described weight coating is the concrete layer with steel-mesh reinforced layer.
9. the seabed thermal insulation pipe of water-tight according to claim 1, is characterized in that, the length of described coating protective coating two end part and described anticorrosive coat overlap joint is 110～150mm.
10. the seabed thermal insulation pipe of water-tight according to claim 2, is characterized in that, the coating thickness of described polyurethane silane coupling agent is 0.05～0.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110409161 CN102434757B (en) | 2011-12-09 | 2011-12-09 | Sealed and waterproof seabed heat-preservation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110409161 CN102434757B (en) | 2011-12-09 | 2011-12-09 | Sealed and waterproof seabed heat-preservation pipe |
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| Publication Number | Publication Date |
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| CN102434757A CN102434757A (en) | 2012-05-02 |
| CN102434757B true CN102434757B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110409161 Active CN102434757B (en) | 2011-12-09 | 2011-12-09 | Sealed and waterproof seabed heat-preservation pipe |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470911B (en) * | 2013-09-29 | 2015-08-19 | 北京隆盛泰科石油管科技有限公司 | The safeguard structure of coating counterweight sea pipe and protecting method |
| 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 |
| CN106764118A (en) * | 2015-11-23 | 2017-05-31 | 青岛大仓防腐有限公司 | A kind of intelligent heat preserving pipe |
| CN105909883A (en) * | 2016-05-30 | 2016-08-31 | 中国海洋石油总公司 | Marine polyurethane spraying prefabricated thermal insulation balance weight pipe and preparation method thereof |
| EP3630481B1 (en) * | 2017-05-30 | 2022-01-12 | Basf Se | Method for the preparation of insulated tubes |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986084Y (en) * | 2006-11-29 | 2007-12-05 | 扬州日利达有限公司 | Polyurethane foam rising vacuum heat-insulating layer |
| CN201757249U (en) * | 2010-06-04 | 2011-03-09 | 中国海洋石油总公司 | Ocean heat preservation aerogel conveying pipeline |
| CN201884805U (en) * | 2010-12-23 | 2011-06-29 | 中国海洋石油总公司 | Wet type thermal insulation and weight counterbalance conveying pipeline for ocean engineering |
| CN202361000U (en) * | 2011-12-09 | 2012-08-01 | 中国海洋石油总公司 | Sealed waterproof submarine thermal-insulation pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1233764A (en) * | 1982-12-23 | 1988-03-08 | George A. Webster | Insulated article |
| JPH02203099A (en) * | 1989-02-02 | 1990-08-13 | Furukawa Electric Co Ltd:The | Heat insulating pipe with internal surface paint film |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986084Y (en) * | 2006-11-29 | 2007-12-05 | 扬州日利达有限公司 | Polyurethane foam rising vacuum heat-insulating layer |
| CN201757249U (en) * | 2010-06-04 | 2011-03-09 | 中国海洋石油总公司 | Ocean heat preservation aerogel conveying pipeline |
| CN201884805U (en) * | 2010-12-23 | 2011-06-29 | 中国海洋石油总公司 | Wet type thermal insulation and weight counterbalance conveying pipeline for ocean engineering |
| CN202361000U (en) * | 2011-12-09 | 2012-08-01 | 中国海洋石油总公司 | Sealed waterproof submarine thermal-insulation pipe |
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| CN102434757A (en) | 2012-05-02 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Energy Development Co., Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY CO., LTD. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Energy Development Co., Ltd. Patentee before: China National Offshore Oil Corporation Co-patentee before: CNOOC (TIANJIN) PIPELINE ENGINEERING TECHNOLOGY CO., LTD. |
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