Composite continuous pipeline capable of resisting temperature of 150 DEG C

Abstract

The utility model relates to a composite continuous pipeline capable of resisting the temperature of 150 DEG C, and belongs to the technical field of oil exploitation. According to the technical scheme, a power line and a signal line are embedded into a modified PA continuous pipe (1) in the forming process, and the power line and the signal line are directly embedded into the pipe wall of the modified PA continuous pipe in the forming process of the modified PA continuous pipe; the power lines and the signal lines are arranged at intervals in the wall of the modified PA continuous pipe in the circumferential direction; a laminated fiber layer (6) is arranged outside the modified PA continuous pipe, a reinforced fiber layer (7) is wound outside the laminated fiber layer, and a modified polytetrafluoroethylene outer sheath (8) is arranged outside the reinforced fiber layer. According to the utility model, a modified anti-scaling high-temperature-resistant PA continuous pipe and reinforced fiber combined structure is adopted, the temperature-resistant grade of the continuous plastic hose is improved to 150 DEG C, the corrosion resistance is improved, the scaling problem is reduced, the power line and the signal line are integrated in the PA lining layer, the integration of electric power and data transmission is realized, and intelligent oil extraction is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of 150 ℃ temperature-resistant composite continuous pipeline, belong to petroleum exploitation technical field. BACKGROUND

[0002] In the process of oil exploitation, continuous pipeline (also known as continuous tubing, continuous tube, etc.) plays a vital role. At present, the continuous pipeline of the prior art oilfield uses high-temperature-resistant tubing, and the continuous pipeline is mostly made of metal pipe, and crude oil flows in the metal pipe. With the increase of running time, dirt will form on the inner and outer walls of the metal pipe, especially the inner wall of the pipe, which will form hard scale and spread inward and outward. The inward spread leads to corrosion of the inner wall of the metal pipe, reducing the strength of the pipe wall. The outward spread makes the scale thicker, increasing the thermal resistance. Corrosion and dirt are the main factors affecting heat transfer efficiency. The continuous pipeline of the prior art also uses plastic cluster pipeline to replace metal pipe, which solves some problems. However, the plastic cluster pipeline has a maximum temperature resistance of 120 ℃, and when it is exposed to hydrogen sulfide (H2S) and carbon dioxide (CO2) and other acid and alkaline media, the plastic cluster pipeline is easily corroded, reducing its service life. Moreover, the plastic cluster pipeline (plastic hose) of the prior art has poor anti-fouling performance due to material properties, and impurities such as wax and gum in crude oil are easily attached to the pipe wall, resulting in reduced transport efficiency. In addition, the plastic cluster pipeline has poor acid and alkali corrosion resistance, making it difficult to operate stably in complex acid and alkaline media for a long time, further limiting its application in oil exploitation environments. SUMMARY

[0003] The utility model aims to provide a kind of 150 ℃ temperature-resistant composite continuous pipeline, which uses a structure combining modified anti-fouling high-temperature-resistant PA continuous pipe and reinforcing fiber to improve the temperature resistance of continuous plastic hose to 150 ℃, improve corrosion resistance and reduce fouling problems. The power line and signal line are integrated in the PA inner layer to realize power and data transmission integration, realize intelligent oil production and solve the above technical problems of the prior art.

[0004] The technical solution of the utility model is as follows:

[0005] A temperature-resistant 150℃ composite continuous pipeline, comprising a modified PA continuous tube, a laminated fiber layer, a reinforced fiber layer and a modified polytetrafluoroethylene outer sheath arranged from inside to outside, the modified PA continuous tube is embedded with a power line and a signal line in the forming process, the power line is composed of a plurality of copper conductors II, and the signal line comprises a copper conductor I, a PVDF insulation and a tinned copper wire shield arranged from inside to outside; in the forming process of the modified PA continuous tube, the power line and the signal line are directly embedded into the wall of the modified PA continuous tube; the power line and the signal line are arranged in the circumferential direction of the wall of the modified PA continuous tube; the modified PA continuous tube is provided with a laminated fiber layer outside, the laminated fiber layer is wound with a reinforced fiber layer outside, and the reinforced fiber layer is provided with a modified polytetrafluoroethylene outer sheath outside.

[0006] The modified PA continuous tube is prepared by adding nano-montmorillonite and carbon nanotubes to PA material; the PVDF is a highly non-reactive thermoplastic fluoropolymer.

[0007] The laminated fiber layer is composed of Kevlar aramid fiber or carbon fiber wire; the outer wall of the modified PA continuous tube is coated with hot melt adhesive, and the laminated fiber layer is bonded with the modified PA continuous tube.

[0008] The glass fiber of the reinforced fiber layer is spirally wound on the surface of the laminated fiber layer.

[0009] PA material, full name polyamide, commonly known as nylon, is a high-performance engineering plastic; on the basis of traditional PA material, 3%-5% mass ratio of nano-montmorillonite is added to improve thermal stability; 0.5%-2% mass ratio of carbon nanotubes is added to improve thermal conductivity and mechanical strength, and prolong the service life of the pipeline; not only can prevent fouling, effectively resist the corrosion of acid and alkali medium such as hydrogen sulfide (H2S) and carbon dioxide (CO2), but also allow the working temperature to be raised to 150℃ for a long time, greatly prolonging the service life of the pipeline.

[0010] Because the signal line is provided with a tinned copper wire shield and embedded into the wall of the modified PA continuous tube, there is no electromagnetic interference between the power line and the signal line, and precise or intelligent oil extraction can be realized. The PVDF is a highly non-reactive thermoplastic fluoropolymer.

[0011] The modified PA continuous tube is provided with a laminated fiber layer outside, which is used as an inner protective layer of non-metal composite pipe; the laminated fiber layer is composed of Kevlar aramid fiber or carbon fiber wire to improve the axial tension of the continuous tube; the outer wall of the modified PA continuous tube is coated with hot melt adhesive, and the laminated fiber layer is bonded with the modified PA continuous tube.

[0012] The reinforcing fiber layer is composed of glass fibers, and the circumferential pressure bearing capacity of the continuous pipe is improved.

[0013] The beneficial effects of the utility model are: the structure of the modified anti-fouling high-temperature-resistant PA continuous pipe combined with the reinforcing fiber improves the temperature resistance of the continuous plastic hose to 150 DEG C, improves the corrosion resistance, reduces the fouling problem, integrates the power line and the signal line in the PA inner lining layer, realizes the integration of power and data transmission, and realizes intelligent oil extraction. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model embodiment;

[0015] Figure 2 It is a signal line local enlarged view of the utility model embodiment;

[0016] In the figure: modified PA continuous pipe 1, copper conductor 2, PVDF insulation 3, tinned copper wire shield 4, copper conductor 5, laminated fiber layer 6, reinforcing fiber layer 7, and modified polytetrafluoroethylene outer sheath 8. DETAILED DESCRIPTION

[0017] The utility model is further described by embodiments in combination with the drawings.

[0018] A temperature-resistant 150 DEG C composite continuous pipe line, comprising a modified PA continuous pipe 1, a laminated fiber layer 6, a reinforcing fiber layer 7 and a modified polytetrafluoroethylene outer sheath 8 arranged from inside to outside, wherein the modified PA continuous pipe 1 is embedded with a power line and a signal line during the forming process, the power line is composed of a plurality of copper conductors 5, and the signal line comprises a copper conductor 2, a PVDF insulation 3 and a tinned copper wire shield 4 arranged from inside to outside; during the forming process of the modified PA continuous pipe 1, the power line and the signal line are directly embedded in the pipe wall of the modified PA continuous pipe 1; the power line and the signal line are arranged in the circumferential direction of the pipe wall of the modified PA continuous pipe 1; the modified PA continuous pipe is provided with the laminated fiber layer 6 outside, the laminated fiber layer 6 is provided with the reinforcing fiber layer 7 outside, and the reinforcing fiber layer 7 is provided with the modified polytetrafluoroethylene outer sheath 8.

[0019] The modified PA continuous pipe 1 is prepared by adding nano montmorillonite and carbon nanotubes to PA material; the PVDF is a highly non-reactive thermoplastic fluoropolymer.

[0020] The laminated fiber layer 6 is composed of Kevlar aramid or carbon fiber filaments; the outer wall of the modified PA continuous pipe 1 is coated with hot melt adhesive, and the laminated fiber layer is bonded with the modified PA continuous pipe 1.

[0021] The glass fibers of the reinforced fiber layer 7 are spirally wrapped on the surface of the laminated fiber layer 6.

[0022] The modified polytetrafluoroethylene outer sheath 8 has extremely strong chemical stability, and the modified material is known to have further improved corrosion resistance. In the face of complex chemical environments in oil exploration, such as hydrogen sulfide (H2S), carbon dioxide (CO2), and other acid-base media, the modified polytetrafluoroethylene can effectively resist erosion and avoid serious corrosion like traditional metal pipelines, thereby greatly extending the service life of the pipeline.

[0023] In the embodiments, the modified PA continuous pipe has the following five specific implementations: taking PA material as 100% by mass, the addition amount of nanometer montmorillonite and carbon nanotubes in each embodiment (taking PA material as 100%) and the performance test data of the manufactured continuous pipeline are as follows:

[0024]

[0025] Conclusion:

[0026] When the content of nanometer montmorillonite is high (such as examples 2, 3, and 5, content 4.8%-5.0%), the heat distortion temperature can reach 150-155℃, and the heat distortion temperature of example 5 (nanometer montmorillonite 5.0%+ carbon nanotube 0.1%) is the highest (155℃), which shows that high content of nanometer montmorillonite is more significant for improving heat resistance.

[0027] When the content of carbon nanotubes is high (such as examples 1 and 4, content 1.9%-2%), the thermal conductivity is higher (0.425-0.468 W / M·K), and when the content of nanometer montmorillonite is too high (such as example 5, 5.0%), the thermal conductivity decreases to 0.312 W / M·K. This shows that carbon nanotubes are more critical for improving thermal conductivity, and excessive nanometer montmorillonite may inhibit the formation of thermal conduction path.

[0028] The tensile strength of example 4 (nanometer montmorillonite 4.2%+ carbon nanotube 2%) is the highest (99.8 MPa), which shows that the synergistic effect of moderate content of nanometer montmorillonite and high content of carbon nanotubes can optimize the mechanical properties. When the content of nanometer montmorillonite is too high (such as examples 2 and 5) or the content of carbon nanotubes is too low, the tensile strength decreases slightly, which may be caused by uneven dispersion of fillers or weakening of interfacial adhesion.

[0029] Modified PA continuous tube is modified by the composite of nano-montmorillonite and carbon nanotubes, which realizes the multi-dimensional improvement of performance, and replaces traditional metal pipes (such as copper and steel) and ordinary engineering plastics. In practical application, the filler ratio needs to be accurately controlled according to the scene requirements (such as heat resistance priority, heat conduction priority or mechanical priority), and the dispersion and interface combination problems need to be solved through process optimization to fully release the performance advantages of the material.

Claims

1. A temperature resistant 150°C composite continuous pipe, characterized by: The application relates to a modified PA continuous tube (1) which is provided with a laminated fiber layer (6), a reinforcing fiber layer (7) and a modified polytetrafluoroethylene outer sheath (8) from inside to outside, wherein the modified PA continuous tube (1) is embedded with a power line and a signal line during a molding process, the power line is composed of a plurality of copper conductors II (5), and the signal line is composed of a copper conductor I (2), a PVDF insulation (3) and a tinned copper wire shield (4) from inside to outside; during the molding process of the modified PA continuous tube (1), the power line and the signal line are directly embedded into the wall of the modified PA continuous tube (1); the power line and the signal line are arranged in a circumferential direction of the wall of the modified PA continuous tube (1) at intervals; the modified PA continuous tube is provided with the laminated fiber layer (6) outside, the laminated fiber layer (6) is wound with the reinforcing fiber layer (7) outside, and the reinforcing fiber layer (7) is provided with the modified polytetrafluoroethylene outer sheath (8) outside.

2. The 150°C resistant composite continuous pipe according to claim 1, characterized in that: The laminated fiber layer (6) is composed of Kevlar aramid fiber or carbon fiber wire; the outer wall of the modified PA continuous tube (1) is coated with hot melt adhesive, and the laminated fiber layer is bonded with the modified PA continuous tube (1).

3. The 150°C resistant composite continuous pipe according to claim 2, characterized in that: The glass fiber of the reinforcing fiber layer (7) is spirally wound on the surface of the laminated fiber layer (6).

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