CN104373705A

CN104373705A - Deep sea oil transportation composite pipeline

Info

Publication number: CN104373705A
Application number: CN201410682473.4A
Authority: CN
Inventors: 陈志华; 何永禹; 刘红波; 王哲; 赵思玥
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2014-11-24
Filing date: 2014-11-24
Publication date: 2015-02-25

Abstract

The invention provides a deep sea oil transportation composite pipeline. The deep sea oil transportation composite pipeline comprises a rigid inner pipe, a rigid outer pipe, a heat preservation layer and an anti-corrosion layer, wherein the portion between the rigid inner pipe and the rigid outer pipe is filled with the heat preservation layer, and the rigid outer pipe is coated with the anti-corrosion layer. The deep sea oil transportation composite pipeline is characterized in that inner pipe studs are fixed to the outer wall of the rigid inner pipe, outer pipe studs are fixed to the inner wall of the rigid outer pipe, the rigid inner pipe and the rigid outer pipe are concentric, the inner pipe studs and the outer pipe studs are evenly arranged in the circumferential direction of the steel pipes and evenly arranged at intervals in the axial direction of the steel pipes, and the heat preservation layer is a foam concrete layer. The deep sea oil transportation composite pipeline has the advantages of being good in heat preservation performance, good in integral working performance and high in stable bearing capacity.

Description

A kind of deep-sea oil transportation multiple tube

Art

The present invention relates to a kind of offshore engineering structure system, more particularly, relate to a kind of deep-sea oil transport pipeline.

Background technique

Along with the expanding day of marine oil and gas limit of mining, land and shallow sea petroleum resources increasingly exhausted, deep-sea oil gas exploitation has become the hot-point and frontier of petroleum industry.Deep seafloor oil transport pipeline usually distance is longer, require harsher, and the Service Environment of deep seafloor oil transport pipeline is comparatively severe, it is also proposed higher requirement to the structural behaviour of submarine pipeline to the thermal insulation property of submarine pipeline.

Traditional individual layer pipeline poor thermal insulation property, is difficult to meet thermal requirements, therefore the deep seafloor oil transport pipeline multi-layer piping system that thermal insulation property must be adopted good.As the most frequently used multi-layer piping system, pipe-in-pipe pipeline is made up of rigidity outer tube, interior pipe, centralizer, in the hoop space that inner and outer pipes is formed, add thermal insulating material (foam, aerogel etc.).Along with the application in engineering, pipe-in-pipe pipeline also exposes self some shortcomings, is mainly manifested in following two aspects:

1, pipe-in-pipe pipeline inner and outer tubes are axially can not compatible deformation, only could compatible deformation at centralizer place in radial direction, and the transmission efficiency of load between inner and outer pipe is low, and pipeline integral working is poor; For opposing pipeline external height hydraulic pressure and pipe interior height oil pressure and high temperature, inner and outer tubes often need relatively thick, cause steel using amount to increase.

2, the thermal insulating material of pipe-in-pipe pipeline lacks structural behaviour, more weak with the bonding of stiff inner tube, outer tube, thus stiff inner tube, outer tube and thermal insulation layer can not integrally cooperative bearings, cause the stability bearing capacity of structure lower.

Summary of the invention

For overcoming the deficiency of above-mentioned existing deep-sea oil transport pipeline technical elements, the invention provides a kind of excellent thermal insulation performance, integral working is good, novel deep sea oil transportation double tube structure that stability bearing capacity is high.

For achieving the above object, the present invention adopts following technological scheme:

A kind of deep-sea oil transportation multiple tube, comprise stiff inner tube, rigidity outer tube, be filled in the thermal insulation layer between stiff inner tube and rigidity outer tube and be coated in the anticorrosive coat of rigidity outer tube, it is characterized in that, interior pipe peg is fixed with at stiff inner tube outer wall, outer tube peg is fixed with at rigidity outer tube wall, stiff inner tube and rigidity outer concentric tube, described interior pipe peg and outer tube peg are evenly arranged along steel pipe hoop respectively, be evenly arranged along steel shaft to every a segment distance, described thermal insulation layer is bubble concrete layer.

Preferably, interior pipe peg and outer tube peg interlaced arrangement, described bubble concrete layer is polystyrene foam concrete layer.

As depicted in figs. 1 and 2, the present embodiment novel deep sea oil transportation double tube structure, comprise stiff inner tube 1, rigidity outer tube 2, interior pipe peg 3, outer tube peg 4, thermal insulation layer 5 and anticorrosive coat 6, stiff inner tube 1 adopts round steel pipe, outside is welded with interior pipe peg 3, and rigidity outer tube 2 adopts round steel pipe, and inside is welded with outer tube peg 4, thermal insulation layer 5 is made up of the polystyrene foam be filled between stiff inner tube 1 and rigidity outer tube 2 (EPS) concrete, and it is outside that anticorrosive coat 6 is coated in rigidity outer tube 2.

Beneficial effect of the present invention is mainly manifested in following two aspects:

1, polystyrene foam (EPS) concrete as thermal insulation layer not only has good insulation, heat insulation performance, and there is good structural behaviour, which increase the flexural rigidity of submarine pipeline, improve the transmission efficiency of load between inner and outer pipe, make the integrally collaborative work of stiff inner tube, outer tube, thus improve compression bearing and the bend-carrying capacity of submarine pipeline.

2, the bonding that stiff inner tube peg that is outside and rigidity outer tube can increase polystyrene foam (EPS) concrete insulating course and stiff inner tube, outer tube is welded on, thermal insulation layer and stiff inner tube, outer tube cooperative bearing and distortion can be ensured, thus improve the stability bearing capacity of submarine pipeline.

Accompanying drawing explanation

In order to the enforcement technological scheme of patent of the present invention is clearly described, below the accompanying drawing that embodiment will use is described, obviously, following accompanying drawing is only some embodiments of patent of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other embodiments can also be developed according to these accompanying drawings.

Fig. 1 is structural system longitudinal sectional drawing of the present invention;

Fig. 2 is that structural system cross section 1-1 of the present invention schemes.

In figure, 1: stiff inner tube, 2: rigidity outer tube, 3: interior pipe peg, 4: outer tube peg, 5: thermal insulation layer,

6: anticorrosive coat.

Embodiment

Below in conjunction with accompanying drawing, carry out clear, complete description to patent working technological scheme of the present invention, obviously, described embodiment is only a part of embodiment of patent of the present invention, and not all embodiments.Based on executing example in patent of the present invention, what those of ordinary skill in the art obtained under the prerequisite not making innovative labor every otherly executes example, all belongs to the scope of patent protection of the present invention.

Method for prefabricating of the present invention is as follows:

(1) pipe peg 3 in stiff inner tube 1 outside weldings, be circumferentially evenly arranged 10 ~ 12, interval 200mm is evenly arranged vertically;

(2) at rigidity outer tube 2 interior welds outer tube peg 4, ensure the different diameters 200mm of stiff inner tube 1 and rigidity outer tube 2, and the layout of outer tube peg 4, with pipe peg 3 interior in (1), coats in rigidity outer tube 2 outside the anticorrosive coat 6 that a layer thickness is about 3mm;

(3) stiff inner tube 1 being welded with interior pipe peg 3 is put into the inside of the rigidity outer tube 2 being welded with outer tube peg 4, ensure stiff inner tube 1 and rigidity outer tube 2 with one heart, and interior pipe peg 3 and outer tube peg 4 are staggeredly placed;

(4) in the annular space that stiff inner tube 1 and rigidity outer tube 2 are formed, build polystyrene foam (EPS) concrete, vibration compacting, maintenance is to specifying the length of time, thus fabricating cost invention novel deep sea oil transportation double tube structure.

Claims

1. a deep-sea oil transportation multiple tube, comprise stiff inner tube, rigidity outer tube, be filled in the thermal insulation layer between stiff inner tube and rigidity outer tube and be coated in the anticorrosive coat of rigidity outer tube, it is characterized in that, interior pipe peg is fixed with at stiff inner tube outer wall, outer tube peg is fixed with, stiff inner tube and rigidity outer concentric tube at rigidity outer tube wall.Described interior pipe peg and outer tube peg are evenly arranged along steel pipe hoop respectively, are evenly arranged along steel shaft to every a segment distance; Described thermal insulation layer is bubble concrete layer.

2. multiple tube according to claim 1, is characterized in that, interior pipe peg and outer tube peg interlaced arrangement.

3. multiple tube according to claim 1, is characterized in that, described bubble concrete layer is polystyrene foam concrete layer.