CN-121993663-A - High-temperature-resistant continuous fiber reinforced nonmetal composite pipe and preparation method thereof

CN121993663ACN 121993663 ACN121993663 ACN 121993663ACN-121993663-A

Abstract

The invention provides a high-temperature-resistant continuous fiber reinforced nonmetal composite pipe and a preparation method thereof. The high-temperature-resistant continuous fiber reinforced nonmetal composite pipe sequentially comprises an inner liner layer, an intermediate layer and an outer layer from inside to outside, wherein the pipe of the inner liner layer (1) is polyphenylene sulfide or modified polyphenylene sulfide, the pipe of the intermediate layer is a continuous carbon fiber reinforced thermosetting resin composite material, and the pipe of the outer layer is a continuous glass fiber reinforced thermosetting resin composite material. The high-temperature-resistant continuous fiber reinforced nonmetallic composite pipe provided by the invention has the long-term service temperature of more than 130 ℃, fills the blank of the lack of the high-performance nonmetallic composite pipe with the temperature resistance of more than 93 ℃ in China, and promotes the development and progress of the high-performance nonmetallic pipe for oil and gas fields.

Inventors

LI LEI
LI HOUBU
ZHU WENFENG
ZHANG DONGNA
QI GUOQUAN
DING NAN
DING HAN
CAI XUEHUA

Assignees

中国石油天然气集团有限公司
中国石油集团工程材料研究院有限公司
新疆中石油管业工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. The high-temperature-resistant continuous fiber reinforced nonmetal composite pipe is characterized by sequentially comprising an inner liner (1), an intermediate layer (2) and an outer layer (3) from inside to outside, wherein the pipe of the inner liner (1) is polyphenylene sulfide or modified polyphenylene sulfide, the pipe of the intermediate layer (2) is a continuous carbon fiber reinforced thermosetting resin composite material, and the pipe of the outer layer (3) is a continuous glass fiber reinforced thermosetting resin composite material.
2. The high temperature resistant continuous fiber reinforced non-metallic composite pipe according to claim 1, wherein the thermosetting resins in the middle layer (2) and the outer layer (3) are both epoxy resins.
3. The high temperature resistant continuous fiber reinforced nonmetallic composite pipe according to claim 1, characterized in that the continuous glass fiber in the outer layer (3) is a surface modified glass fiber, and the preparation method of the surface modified glass fiber is as follows: 1) Dissolving 4, 4' -diaminodiphenyl ether and 5,5' -carbonyl bis (1, 3-isobenzofurandione) solid particles in N, N ' -dimethylformamide, adding the obtained solution into deionized water to obtain a hydrosol system, and adding polyvinylpyrrolidone into the hydrosol system to obtain an amic acid emulsion; 2) And uniformly coating the amic acid emulsion on the surface of the bare continuous glass fiber, and drying to obtain the surface modified glass fiber.
4. The high temperature resistant continuous fiber reinforced nonmetallic composite tube of claim 1, wherein the modified polyphenylene sulfide is a PTFE blend modified polyphenylene sulfide, a short glass fiber filled modified polyphenylene sulfide, a short carbon fiber filled modified polyphenylene sulfide, or a nanoparticle filled modified polyphenylene sulfide.
5. The high-temperature-resistant continuous fiber reinforced nonmetallic composite pipe according to claim 1, characterized in that the outer surface of the inner liner layer (1) is provided with a stop belt, the stop belt is spiral, and the spiral direction and angle are consistent with the winding direction and angle of the continuous carbon fiber in the middle layer (2).
6. The method for preparing the high-temperature-resistant continuous fiber reinforced nonmetal composite pipe as claimed in any one of claims 1 to 5, which is characterized by comprising the following steps: (1) Forming an inner liner (1) by extrusion molding of polyphenylene sulfide or modified polyphenylene sulfide granules; (2) Immersing continuous carbon fibers in a glue solution, and continuously and reciprocally winding the glue solution around the inner liner (1) to a preset thickness to form an intermediate layer (2), wherein the glue solution comprises thermosetting resin, a curing agent and an accelerator; (3) Immersing continuous glass fibers into the glue solution, and then continuously and reciprocally winding the glue solution around the middle layer (2) to a preset thickness to form an outer layer (3); (4) Solidifying and forming the glue solution by heating, and cooling to obtain the high-temperature-resistant continuous fiber reinforced nonmetallic composite pipe.
7. The method for preparing the high-temperature-resistant continuous fiber reinforced nonmetal composite pipe according to claim 6, wherein in the step (1), the granules are dried in advance, the drying temperature is 120-130 ℃, and the heat preservation time is 3-4 hours.
8. The method for preparing the high-temperature-resistant continuous fiber reinforced nonmetal composite pipe, which is characterized in that in the step (1), a stop belt is machined on the outer surface of the lining layer (1), the stop belt is spiral, and the spiral angle is 40-60 degrees; Immersing continuous carbon fibers into glue solution, then winding the continuous carbon fibers in a unidirectional manner around a stop belt gap of the inner liner (1) until the stop belt gap is filled, and then winding the continuous carbon fibers in a reciprocating manner according to two angles of 60-80 degrees and 40-60 degrees, wherein the two angles are alternately arranged by taking a single cycle as a basic unit.
9. The method for preparing the high-temperature-resistant continuous fiber reinforced nonmetal composite pipe, as claimed in claim 6, is characterized in that in the step (3), the continuous glass fiber and the composite pipe are arranged in a crossed and bidirectional manner at an axial winding angle of 40-60 degrees, and the thickness range of the obtained outer layer (3) is 2-15 mm.
10. The method for preparing a high-temperature-resistant continuous fiber reinforced nonmetal composite pipe according to claim 6, wherein in the step (4), the heating temperature is 150-180 ℃, and the heat preservation time is 2-4 hours.

Description

High-temperature-resistant continuous fiber reinforced nonmetal composite pipe and preparation method thereof Technical Field The invention belongs to the field of oil and gas field development, and particularly relates to a high-temperature-resistant continuous fiber reinforced nonmetal composite pipe and a preparation method thereof. Background With the sustainable development of the economy and society, the energy demands of petroleum, natural gas and the like are larger and larger, and the speed of oil and gas exploration and development is also continuously accelerated. The development force of difficult oil and gas resources such as deep land, deep sea, unconventional and the like is gradually increased, the production increasing means of the old oil and gas field is more abundant, the components of the produced oil and gas medium are more complex, the operation working condition is more severe, the ground gathering and transporting system faces serious challenges such as high-temperature high-pressure and strong corrosion environment, and the common steel pipeline has poor corrosion resistance and frequent corrosion failure problems, so that the development and operation cost of oil and gas field enterprises is greatly increased, and the safety risk is outstanding. The nonmetallic tube has the advantages of excellent corrosion resistance, low comprehensive cost, convenient installation, long service life, wax deposition scaling delay and the like, and is widely popularized and applied in oil and gas fields for more than ten years. By the end of 2023, the nonmetallic pipeline application mileage accounts for 15% of the oil and gas field ground pipeline mileage, reaches over 6 kilometers, and still grows at a high speed of 10%, so that the future application potential is huge. Reinforced thermosetting plastic pipes such as glass reinforced plastic pipes, thermoplastic plastic lining composite pipes and the like have the earliest service time and the highest use level, and the ratio of the reinforced thermosetting plastic pipes to the non-metal pipes exceeds 65 percent. However, the conventional reinforced thermosetting plastic pipes are increasingly inadequate in terms of their temperature resistance, pressure resistance and resistance to complex media in the face of increasingly demanding operating conditions. For example, the glass fiber reinforced plastic pipe for the ground pipeline of the oil and gas field has the highest temperature resistance of only 93 ℃ for a long time, can not meet the high temperature requirements (the temperature exceeds 110 ℃) of an ultra-deep well, a later water injection well and the like, has the highest pressure resistance of only 25MPa, has the highest pressure resistance, has obviously reduced pressure bearing after the caliber is increased, has poor medium compatibility, and is serious in heat-curable resin loss in severe environments such as three-time injection, production, sand production and the like. Therefore, the development of the novel nonmetal composite pipe which is high-temperature resistant, high-pressure resistant and large in output and can adapt to severe corrosion environment has very important significance for improving the development efficiency of the oil and gas field, guaranteeing the safety of the oil and gas field and reducing the operation cost. Disclosure of Invention In order to solve the problems of the prior art, the invention provides a high-temperature-resistant continuous fiber reinforced nonmetallic composite pipe and a preparation method thereof. The invention is realized by the following technical scheme: the high-temperature-resistant continuous fiber reinforced nonmetal composite pipe sequentially comprises an inner liner layer, an intermediate layer and an outer layer from inside to outside, wherein the pipe of the inner liner layer is polyphenylene sulfide or modified polyphenylene sulfide, the pipe of the intermediate layer is a continuous carbon fiber reinforced thermosetting resin composite material, and the pipe of the outer layer is a continuous glass fiber reinforced thermosetting resin composite material. Preferably, the thermosetting resin in the middle layer and the outer layer is epoxy resin. Preferably, the continuous glass fiber in the outer layer is a surface modified glass fiber, and the preparation method of the surface modified glass fiber comprises the following steps: 1) Dissolving 4, 4' -diaminodiphenyl ether and 5,5' -carbonyl bis (1, 3-isobenzofurandione) solid particles in N, N ' -dimethylformamide, adding the obtained solution into deionized water to obtain a hydrosol system, and adding polyvinylpyrrolidone into the hydrosol system to obtain an amic acid emulsion; 2) And uniformly coating the amic acid emulsion on the surface of the bare continuous glass fiber, and drying to obtain the surface modified glass fiber. Preferably, the modified polyphenylene sulfide is PTFE blending modified polyphenylene sulf