CN218063719U

CN218063719U - Marine corrosion-resistant flexible pipe

Info

Publication number: CN218063719U
Application number: CN202222538221.7U
Authority: CN
Inventors: 赵晓; 赵绍东; 孙维志; 夏平原; 朱原原
Original assignee: Jiangsu Zhengdao Marine Technology Co ltd
Current assignee: Jiangsu Zhengdao Marine Technology Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-16
Anticipated expiration: 2032-09-23

Abstract

The utility model relates to an ocean oil gas conveying equipment technical field specifically is a corrosion-resistant flexible pipe is used to ocean, include from interior to fluid shielding layer, casing ply, resistance to compression armor, first wearing layer, tensile armor, second wearing layer and the outer protective layer that sets gradually outward, the casing ply is made by the steel cord winding that the parcel has barrier material. According to the flexible pipe, the blocking material is wrapped outside the steel cord to prepare the framework layer, so that the corrosion resistance of the framework layer is effectively improved, and the problem that the external pressure load bearing caused by corrosion of the framework layer of the traditional flexible pipe is reduced is solved. Meanwhile, the steel cord has a strong anti-twisting function, and can replace an anti-twisting layer in the traditional tube body while bearing external pressure load, so that the total thickness of the tube body is effectively reduced.

Description

Marine corrosion-resistant flexible pipe

Technical Field

The utility model relates to an ocean oil gas conveying equipment technical field specifically is an ocean is with corrosion-resistant flexible pipe.

Background

The sea has abundant oil and gas resources, and submarine pipelines are key components of the sea foundation structure in the development of the sea oil and gas field. With the development of the oil and gas industry, the application of the marine flexible pipe in the development of marine oil and gas fields is more and more extensive. The composite hose can be used as a static pipeline or a dynamic pipeline and is widely used for pipelines of production, injection, export and service.

The flexible pipe for offshore fields outlined by the recommended regulations DNVGL RP F119 is mainly used for flexible flowlines and flexible jumper pipes, which can carry large dynamic loads in the process or offshore environment. The typical flexible pipe section for offshore oil and gas fields usually comprises a framework layer, an inner fluid shielding layer, a compression-resistant armor layer, a wear-resistant layer, a tensile armor layer, a wear-resistant layer, a tensile armor layer, a local distortion-resistant layer and an outer fluid shielding layer, wherein the traditional offshore oil and gas field flexible pipe is of a 9-layer structure, for example, chinese patent document CN 208735050U (application number 201821471300.8) discloses a composite flexible pipe, the pipe wall of the composite flexible pipe sequentially comprises the framework layer, an inner liner layer, the compression-resistant armor layer, a middle protective sleeve layer, a cable hole layer, a first tensile armor layer, a second tensile armor layer and an outer protective sleeve layer from inside to outside, the inner liner layer and the outer protective sleeve layer respectively block corrosion of a pipe body caused by transport fluid and an ocean environment, but the framework layer in the flexible pipe is located inside the inner liner layer and directly contacted with the transport fluid, the service life of the framework layer cannot be guaranteed, meanwhile, due to the arrangement of the plurality of armor layers made of steel, the wear-resistant layers with the number matched with the wear-resistant armor layers need to be arranged for protection, the thickness of the flexible pipe is increased, and the preparation process becomes complicated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned prior art not enough, providing a corrosion-resistant flexible pipe is used to ocean, the framework layer is made by the steel cord that the parcel has barrier material in the body, effectively improves the corrosion resisting property of framework layer, and integrated armor sets up the position simultaneously, reduces the total number of piles of wearing layer and armor, retrencies the preparation flow when reducing the wall thickness.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the marine corrosion-resistant flexible pipe comprises a fluid shielding layer, a framework layer, a compression-resistant armor layer, a first wear-resistant layer, a tensile armor layer, a second wear-resistant layer and an outer protective layer which are sequentially arranged from inside to outside, wherein the framework layer is formed by winding a steel cord wrapped with a barrier material.

According to the flexible pipe, the blocking material is wrapped outside the steel cord to prepare the framework layer, so that the corrosion resistance of the framework layer is effectively improved, and the problem that the external pressure load bearing caused by corrosion of the framework layer of the traditional flexible pipe is reduced is solved. Meanwhile, the steel cord has a strong anti-twisting function, and can replace an anti-twisting layer in the traditional tube body while bearing external pressure load, so that the total thickness of the tube body is effectively reduced.

Preferably, the barrier material is made of resin or other material with strong barrier properties.

Preferably, the tensile armour layer is made by cross winding an even number of layers of steel.

Preferably, the first wear-resistant layer and/or the second wear-resistant layer are made of a self-healing material. Use the self-healing material to make the wearing layer, when the body produced the wriggling by ocean current influence in the ocean, tensile armor can carry out the self-healing after the wearing and tearing to the wearing layer after, the self-healing material effectively keeps apart tensile armor in the body, extension body life reduces use cost.

Preferably, the outer protective layer is made of a thermoplastic.

Further preferably, the outer protective layer is made of one of Polyethylene (PE), polypropylene (PP), heat-resistant Polyethylene (PERT), POK, PVDF, nylon (PA) or other materials having the same function.

The utility model has the advantages that:

1. the flexible pipe is coated with the barrier material outside the steel cord to prepare the framework layer, so that the corrosion resistance of the framework layer is effectively improved, and the problem of reduction of external pressure load bearing caused by corrosion of the framework layer of the traditional flexible pipe is solved. Meanwhile, the steel cord has a strong anti-twisting function, and can replace an anti-twisting layer in the traditional tube body while bearing external pressure load, so that the total thickness of the tube body is effectively reduced;

2. use the self-healing material to make the wearing layer, when the body produced the wriggling by ocean current influence in the ocean, tensile armor can carry out the self-healing after the wearing and tearing to the wearing layer after, the self-healing material effectively keeps apart tensile armor in the body, extension body life reduces use cost.

Drawings

FIG. 1 is a schematic structural diagram of a corrosion-resistant flexible pipe for oceans provided in example 1;

wherein, 1, the fluid shielding layer; 2. a framework layer; 3. a compression-resistant armor layer; 4. a first wear resistant layer; 5. a tensile armor layer; 6. a second wear layer; 7. and an outer protective layer.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

Example 1:

the utility model provides a marine corrosion-resistant flexible pipe, include fluid shielding layer 1 that sets gradually from inside to outside, casing ply 2, resistance to compression armor 3, first wearing layer 4, tensile armor 5, second wearing layer 6 and outer protective layer 7, in the preparation process, fluid shielding layer 1 and casing ply 2 make integrated structure, with better gas barrier performance has been had, gaseous gathering leads to the pipeline conquassation in having avoided the annular space, the corruption of the damp and hot environment to the metal function layer that the annular space formed has also been reduced, the metal function layer high strength armor key has been reduced promptly and hydrogen induced fracture (HIC) and Sulphide Stress Crack (SSC) risk have taken place, the long-term effective service mesh of flexible pipe has been reached. The framework layer 2 is formed by winding a steel cord wrapped with a barrier material. The barrier material is made of resin or other materials with strong barrier property, and in this embodiment, the resin is made of a resin material provided by chinese patent document CN108503738A (application No. 201810338996.5). The tensile armor layer 5 is made by winding an even number of steel materials in a cross way, and in the embodiment, the tensile armor layer 5 is made by winding 4 steel materials in a cross way. The first wear-resistant layer 4 is made of a self-healing material, in this embodiment, the self-healing material is selected from materials provided in paragraph [0015] of the specification of chinese patent document CN 206338503U (application No. 201621471645.4), and of course, other existing commercially available self-healing materials may also be used. Use the self-healing material to make the wearing layer, when the body receives ocean current influence to produce the wriggling in the ocean, tensile armor 5 is to wearing and tearing back of wearing and tearing, and the self-healing material can carry out the self-healing after wearing and tearing, effectively keeps apart tensile armor 5 in the body, extension body life reduces use cost. The outer protective layer 7 is made of thermoplastic, and specifically, the outer protective layer 7 is made of one of Polyethylene (PE), polypropylene (PP), heat-resistant Polyethylene (PERT), POK, PVDF, nylon (PA), or other materials having the same function. In this embodiment, the outer protective layer 7 is made of nylon.

The flexible pipe is coated with the barrier material outside the steel cord to prepare the framework layer, so that the corrosion resistance of the framework layer is effectively improved, and the problem of reduction of external pressure load bearing caused by corrosion of the framework layer of the traditional flexible pipe is solved. Meanwhile, the steel cord has a strong anti-twisting function, and can replace an anti-twisting layer in the traditional tube body while bearing external pressure load, so that the total thickness of the tube body is effectively reduced.

Example 2:

this embodiment of a corrosion-resistant flexible pipe for marine use differs from embodiment 1 in that the second wear-resistant layer 6 is made of a self-healing material, and other technical details are the same.

Example 3:

the embodiment of the corrosion-resistant flexible pipe for the ocean is different from the embodiment 1 in that the first wear-resistant layer 4 and the second wear-resistant layer 6 are both made of self-healing materials, and other technical details are the same.

Claims

1. The marine corrosion-resistant flexible pipe is characterized by comprising a fluid shielding layer (1), a framework layer (2), a pressure-resistant armor layer (3), a first wear-resistant layer (4), a tensile armor layer (5), a second wear-resistant layer (6) and an outer protective layer (7) which are sequentially arranged from inside to outside, wherein the framework layer (2) is formed by winding steel cords wrapped with barrier materials.

2. The corrosion resistant flexible pipe for marine use of claim 1 wherein said barrier material is made of resin.

3. Marine corrosion resistant flexible pipe according to claim 1, characterised in that said tensile armour layer (5) is made of an even number of layers of steel cross wound.

4. Marine corrosion resistant flexible pipe according to claim 1, characterised in that the first wear layer (4) and/or the second wear layer (6) are made of a self-healing material.

5. Marine corrosion-resistant flexible pipe according to claim 1, characterised in that the outer protective layer (7) is made of thermoplastic.

6. Marine corrosion resistant flexible pipe according to claim 5, characterised in that the outer protective layer (7) is made of one of Polyethylene (PE), polypropylene (PP), heat resistant Polyethylene (PERT), POK, PVDF or nylon (PA).