CN218267961U - Heat-insulation thermoplastic plastic composite continuous pipe for shallow sea - Google Patents

Abstract

The utility model relates to the technical field of oil gas transmission, in particular to a heat-insulating thermoplastic plastic composite continuous pipe for shallow sea, which comprises a medium transmission layer, a first self-healing layer, a reinforcing layer, a second self-healing layer, a heat-insulating layer and an outer protective layer which are arranged in sequence from inside to outside; and when the metal material in the pipe body is wound, the sacrificial anode material and the steel belt are wound together. The utility model provides a coiled tubing, through set up the self-healing layer respectively in enhancement layer inside and outside both sides, keep apart enhancement layer and interior outer functional layer, when the coiled tubing rocks by the influence of shallow sea ocean current, the enhancement layer produces the wriggling in the body, and the enhancement layer carries out contact friction with two self-healing layers this moment, and the self-healing layer can carry out the self-healing after receiving the enhancement layer to its damage, prolongs pipeline service life; the sacrificial anode material is reacted with water vapor or other gas molecules before the metal material is reacted, so that the metal material is protected from being corroded, and the service life of the pipe body is effectively prolonged.

Description

Heat-insulation and heat-preservation thermoplastic composite continuous pipe for shallow sea

technical field

The utility model relates to the technical field of oil and gas transportation, in particular to a heat-insulating and heat-preserving thermoplastic composite continuous pipe for shallow seas.

Background technique

The area of the ocean accounts for about 71% of the total area of the earth. As an important part of global resources, marine resources are an important source of various resource exploitation. Among them, among the proven reserves of offshore oil and gas in the world, shallow sea oil and gas dominates. In the development of offshore oil and gas resources, the submarine oil and gas pipeline is an important way for the internal equipment connection of Haiyang oil and gas field and the export of produced oil and gas resources. It is an indispensable key component for the development of Haiyang oil and gas resources. ".

Flexible composite pipes are widely used in onshore oil fields because of their advantages such as good flexibility, large continuous length of single pipe, high pressure bearing, and corrosion resistance, and become ideal anti-corrosion pipes for oil and gas fields. Composite pipe that implements the standard of "Non-metallic continuous pipe for oil and gas industry Part 2 flexible composite high-pressure delivery pipe" (SY/T 6662.2). This type of pipe is usually composed of a three-layer structure of inner lining layer, non-reinforced layer and outer protective layer , due to the light weight of the meter, this kind of pipe cannot effectively use its own weight to settle on the shallow seabed. If it is laid in shallow sea, it will need to increase a large number of counterweight equipment and increase the cost of pipeline construction; while the implementation of "Non-metallic coiled pipe for oil and gas industry Part 4 Steel frame reinforced thermoplastic composite coiled tubing and joints" (SY/T 6662.4) standard coiled tubing is reinforced with metal steel strips inside. Due to its certain meter weight, it can sink to the bottom of the shallow sea by its own weight, and has become an application in the shallow sea field. This type of continuous pipe usually includes a transmission layer, a bonding layer, a first bonding layer, a steel wire or steel belt reinforcement layer, a second bonding layer, a first outer protective layer, a third bonding layer, an insulation layer and The protective layer has a multi-layer structure. During the long-term service of the pipeline, due to the movement of the continuous pipe due to the movement of tidal currents, the reinforcement layer will also creep or elongate accordingly. The reinforcement layer and the adhesive layer will wear and eventually damage the medium transmission layer, resulting in pipe failure. . In order to increase the meter weight of the pipe, metal materials must be used inside the pipe. However, the metal layer of the pipe will inevitably be in a hot and humid environment during the service of the seabed (the hot and humid small molecule gas enters the reinforcement layer through the transmission layer and accumulates through penetration), resulting in Corrosion of metal materials, with the extension of pipeline service time, the risk of pipeline safety service is gradually increasing.

In view of the above technical problems, there is an urgent need for a coiled tubing that can be used in shallow seas and has a long service life.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a heat-insulating thermoplastic composite continuous pipe for shallow seas. By setting a self-healing layer on the inside and outside of the reinforcement layer, the reinforcement layer is isolated from other functional layers. , which effectively avoids damage to the pipe body caused by friction between the reinforcement layer and other layers due to the sloshing of the pipe body. The self-healing layer has a certain self-healing ability and can perform self-repair after being worn by the reinforcement layer, thereby effectively prolonging the service life of the pipe body .

In order to realize above-mentioned technical effect, the utility model adopts following technical scheme:

A heat-insulating thermoplastic composite continuous pipe for shallow seas, comprising a medium transmission layer, a first self-healing layer, a reinforcement layer, a second self-healing layer, an insulation layer and an outer protective layer arranged sequentially from the inside to the outside;

The reinforcement layer is composed of even-numbered sub-reinforcement layers, and the steel strip is wound together with the sacrificial anode material to form a sub-increment layer;

Alternatively, the reinforcing layer is made of a fiber reinforced tape, and a metal weight layer is also provided between the heat insulation layer and the outer protective layer, and the metal weight layer is composed of a steel strip and a sacrificial anode material wound together, A third self-healing layer is provided between the metal weight layer and the thermal insulation layer.

In order to ensure the strength of the pipe body, no matter whether the reinforcement layer is made of steel belt or fiber reinforced tape, the reinforcement layer must have certain toughness. The reinforcement layer will cause wear to the functional layers on both sides. The coiled pipe provided by the utility model is provided with self-healing layers on both sides of the reinforcement layer to isolate the reinforcement layer from the inner and outer functional layers. When the coiled pipe is affected by the shallow sea current When shaking, the reinforcement layer and the two self-healing layers are in contact friction at this time, and the self-healing layer can perform self-healing composite after being damaged by the reinforcement layer, effectively offsetting the impact of shallow sea currents on the coiled pipe and prolonging the service life of the pipeline.

At the same time, when the metal material (steel strip) in the tube is wound, the sacrificial anode material and the metal material are co-wound, and when the gas carried in the oil and gas transported inside penetrates into the tube body through the medium transmission layer, the sacrificial anode material precedes The metal material reacts with water vapor or other gas molecules to protect the metal material from corrosion and effectively prolong the service life of the pipe body.

Preferably, in the adjacent sub-reinforcement layers, there is an included angle between the winding angles of the sub-reinforcement layers.

Preferably, the sacrificial anode material is selected from magnesium, zinc or aluminum alloy.

Preferably, the medium transmission layer is made of high temperature resistant cross-linked polyethylene, polyvinylidene fluoride, nylon 12, polyphenylene sulfide or other high temperature resistant resins.

Preferably, the insulation layer is made of silicone/HGM (hollow glass microsphere) foam.

HGM is a glass microsphere composed of SiO ₂ , Al ₂ O ₃ , carbon, borate, etc., with a diameter of 1-100 μm and a hollow closed-pore structure. Due to its unique structure and materials, HGM has the properties of heat insulation, reinforcement, low density, sound transmission slowing, high temperature resistance and good electrical insulation. It is widely used to prepare heat insulation materials, buoyancy materials, sound insulation materials, resistance High temperature materials and insulating materials and other materials. The hollow closed-cell structure of HGM hinders heat in the process of heat conduction and heat convection, and is a kind of filler with excellent heat insulation performance.

Silicone/HGM is an emerging thermal insulation material. Compared with silicone foam prepared by traditional foaming methods, silicone/HGM foam has simple process, easy control of material performance parameters, high mechanical strength, low cost and environmental protection. Silicone/HGM foam material has good thermal insulation performance and excellent thermal stability, and has good mechanical strength at the same time, which not only provides thermal insulation effect, but also further enhances the overall mechanical strength of the composite pipe.

The beneficial effects of the utility model are:

1. The coiled pipe provided by the utility model is provided with self-healing layers on the inner and outer sides of the reinforced layer to isolate the reinforced layer from the inner and outer functional layers. When the coiled pipe is shaken by the influence of shallow sea currents, the reinforced layer is inside the pipe body Peristalsis occurs, at this time, the reinforcing layer is in contact with the two self-healing layers, and the self-healing layer can perform self-healing and compounding after being damaged by the reinforcing layer, effectively offsetting the impact of shallow sea currents on the coiled pipe and prolonging the service life of the pipeline;

2. When the metal material (steel strip) in the tube is wound, the sacrificial anode material and the metal material are wound together. When the gas carried in the oil and gas transported inside penetrates into the tube body through the medium transmission layer, the sacrificial anode material precedes The metal material reacts with water vapor or other gas molecules to protect the metal material from corrosion and effectively prolong the service life of the pipe body.

Description of drawings

Fig. 1 is the schematic diagram of the thermal insulation thermoplastic composite continuous pipe for shallow sea that embodiment 1 provides;

Fig. 2 is the structural representation of enhancement layer in embodiment 1;

Fig. 3 is the sectional view of reinforcement layer in embodiment 1;

Fig. 4 is the schematic diagram of the thermal insulation thermoplastic composite continuous pipe for shallow sea provided by embodiment 2;

Among them, 1. medium transmission layer; 2. first self-healing layer; 3. reinforcement layer; 31. first sub-reinforcement layer; 32. second sub-reinforcement layer; 33. steel belt; 34. sacrificial anode material; 4. 2nd self-healing layer; 5. Insulation layer; 6. Outer protective layer; 7. Metal counterweight layer; 8. Third self-healing layer.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Example 1:

A heat-insulating thermoplastic composite continuous pipe for shallow seas, as shown in Figure 1, comprising a medium transmission layer 1, a first self-healing layer 2, a reinforcement layer 3, a second self-healing layer 4, Insulation layer 5 and outer protective layer 6; As shown in Figure 2 and Figure 3, in the present embodiment, described reinforcement layer 3 is made up of two layers of sub-reinforcement layers-namely the first sub-reinforcement layer 31 and the second sub-reinforcement layer 32 The sub-reinforcing layers are all made of steel strips 33 and sacrificial anode material 34, and it should be noted that FIG. 3 is only a schematic diagram. It can be a square or other shapes that can better match the size of the steel strip 33, and is not limited to the circle shown in FIG. Yes, the first sub-reinforcement layer 31 is wound in the left direction, and the second sub-reinforcement layer 32 is wound in the right direction, so that there is an included angle between the winding angles of the two sub-reinforcement layers, thereby enhancing the overall pressure bearing capacity of the pipe body. In this embodiment, the sacrificial anode material 34 is first made of metal zinc, the dielectric transmission layer 1 is made of polyvinylidene fluoride, and the insulation layer 5 is made of organic silicon/HGM foam.

The coiled pipe provided by the utility model is provided with self-healing layers on the inner and outer sides of the reinforced layer 3 to isolate the reinforced layer 3 from the inner and outer functional layers. Internal creep occurs. At this time, the reinforcement layer 3 is in contact with the two self-healing layers. After being damaged by the reinforcement layer 3, the self-healing layer can perform self-healing and compounding, effectively offsetting the impact of shallow sea currents on the coiled pipe and extending the pipeline. service life.

At the same time, when the metal material in the pipe body, that is, the steel strip 33 is wound, the sacrificial anode material 34 and the steel strip 33 are wound together. It reacts with water vapor or other gas molecules before the metal material to protect the metal material from corrosion and effectively prolong the service life of the pipe body.

In this embodiment, the organosilicon/HGM foam material can be provided by Zhou Guangwei, Beijing University of Chemical Technology, June 2020 Silicone/HGM foam, other available silicone/HGM foam materials can also be used.

Example 2:

As shown in Figure 4, a thermal insulation thermoplastic composite continuous pipe for shallow seas, including a medium transmission layer 1, a first self-healing layer 2, a reinforcement layer 3, a second self-healing layer 4, Insulation layer 5 and outer protective layer 6;

In this embodiment, the reinforcing layer 3 is made of a fiber reinforced tape. Since the fiber reinforced tape is light in weight, the meter weight of the pipe body cannot be guaranteed. A metal weight layer 7 is provided, and the metal weight layer 7 is composed of a steel belt 33 and a sacrificial anode material 34 wound together, and a third self-healing layer 8 is arranged between the metal weight layer 7 and the thermal insulation layer 5 .

The reinforced layer 3 is made of fiber reinforced tape, and the metal weight layer 7 is arranged inside the outer protective layer 6, which can effectively isolate the oil and gas transported in the pipe body from the metal, and reduce the water vapor or other substances penetrating into the metal material as much as possible. Gas, to ensure the overall strength and service life of the pipe body.

Claims (5)

1. A heat-insulation thermoplastic composite continuous pipe for shallow sea is characterized by comprising a medium transmission layer (1), a first self-healing layer (2), an enhancement layer, a second self-healing layer (4), a heat-insulation layer (5) and an outer protection layer (6) which are sequentially arranged from inside to outside;

the enhancement layer (3) consists of even-numbered sub-enhancement layers, and the sub-enhancement layers consist of steel strips (33) and sacrificial anode materials (34) which are wound together;

or, enhancement layer (3) are made by the fiber reinforcement area, heat preservation (5) with still be equipped with metal counterweight layer (7) between outer protective layer (6), metal counterweight layer (7) are twined jointly by steel band (33) and sacrificial anode material (34) and are constituteed, be equipped with third self-healing layer (8) between metal counterweight layer (7) and heat preservation (5).

2. The shallow sea thermal insulating thermoplastic composite continuous pipe as claimed in claim 1, wherein, in the adjacent sub-reinforcing layers, an included angle exists between winding angles of the sub-reinforcing layers.

3. The shallow sea insulated thermoplastic composite coiled tubing of claim 2, wherein the sacrificial anode material is selected from magnesium, zinc, or aluminum alloy.

4. The shallow sea thermal insulation thermoplastic composite continuous pipe as claimed in claim 1, wherein the medium transmission layer (1) is made of high temperature resistant cross-linked polyethylene, polyvinylidene fluoride, nylon 12 or polyphenylene sulfide.

5. The thermo-insulating thermoplastic composite continuous pipe for shallow sea use according to claim 1, characterized in that the thermo-insulating layer (5) is made of silicone/HGM foam.

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