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Continous sucker rod made of fiber reinforced composition and its making method

A composite material and fiber-reinforced technology, applied in the direction of fiber chemical characteristics, drill pipe, earthwork drilling and mining, etc., can solve the problems of low interlayer shear strength, increase the preparation process and cost of tie rods, and poor bonding force, so as to improve the resistance Lateral splitting and wear resistance, improvement of transverse splitting strength, and effect of improving interlayer bonding force

Inactive Publication Date: 2003-12-17
胜利油田孚瑞特石油装备有限责任公司 +1
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Problems solved by technology

In this method, the reinforced carbon fiber and glass fiber are unidirectionally arranged and pultruded, because there is no fiber reinforcement in the transverse direction, resulting in low interlayer shear strength, and the problem of longitudinal splitting of composite material bands is prone to occur in oil wells
Especially in deep well operations, the sucker rod is prone to local abrasion with the tubing, which reduces the service life
Chinese patent 00111155.8 discloses a high-toughness aramid carbon fiber composite pull rod, which uses aramid and carbon fiber as reinforcement materials and is compounded with an epoxy resin matrix. In order to prevent the local wear of the continuous pull rod and the oil pipe, wear-resistant Hoops and wear-resistant hoops need to be processed into parts separately, and then installed on the tie rods in sections, which increases the preparation process and cost of the tie rods
At the same time, the problem of low lateral strength of the sucker rod has not been solved
A composite tie rod disclosed in Chinese patent 00105168.7 uses carbon fiber and aramid fiber to weave the net cover, wears a skeleton reinforcing fiber, and is pultruded with resin after flattening to increase its transverse tensile strength, but in the middle of the continuous net cover It is difficult to realize the industrialization of penetrating continuous reinforcing skeleton fibers
The cladding structure of the tie rod enhances the resistance to lateral splitting of the tie rod, and the use of aramid fiber as the coating layer improves the wear resistance of the tie rod itself, but the vinyl ester resin is used as the matrix to wrap carbon fiber with aramid fiber, and the interface The bonding force between them is poor, and under severe working conditions such as high temperature and repeated fatigue stretching during the oil production process, delamination of the coating layer and carbon fiber is prone to occur, which affects the service life
And pure aramid fabric for covering, the cost is higher
The patent also proposes to use glass fiber as the cladding layer, but its wear resistance and strength are not as good as aramid fiber
And the patent does not disclose the pultrusion preparation method

Method used

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  • Continous sucker rod made of fiber reinforced composition and its making method
  • Continous sucker rod made of fiber reinforced composition and its making method
  • Continous sucker rod made of fiber reinforced composition and its making method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The sucker rod (as image 3 shown), the section is 32×4.2mm rectangular, and the length is 2500 meters. The inner layer is unidirectionally arranged carbon fibers (brand: American Hexcel-AS4, 12K160 beams) with a volume percentage of 58%, of which: carbon fiber online surface treatment furnace 3 (see Figure 4 ) temperature is 400°C, the atmosphere is air, the size of the furnace body is: length*width*height=150*30*15 cm, and the carbon fiber wire speed is 0.35 m / s. The carbon fiber coming out from the treatment furnace enters the dipping tank 4, the vinyl ester matrix resin in the dipping tank: U.S. DOW chemical company resin: Derakane 411-350, curing agent: bis(4-tert-butylcyclohexyl) peroxydicarbonate Such as: commercially available Perkadox-16, 0.3% (accounting for resin weight ratio), tert-butyl peroxybenzoate Trigonox-C 0.9% (accounting for resin weight ratio), release agent: INT-PS125 1.2% (accounting for resin weight ratio) Compare). The aramid (or ultra-high...

Embodiment 2

[0034] Example 2: The sucker rod prepared by the above-mentioned embodiment, wherein: the die is 32×4.2mm, the pultrusion speed is 0.80m / min, the carbon fiber: T700S-12K of Japan Toray Company, the tensile strength is 4.9Gpa, the tensile die The volume is 235Gpa, the online surface treatment temperature is 450°C, and the atmosphere is: mixed air with 10% oxygen. Matrix resin in the dipping tank: Hetron922 vinyl ester resin from Ashland Corporation of the United States, curing agent: Perkadox-160.3%, Trigonox-21 0.4%, Trigonox-C 0.2% (accounting for resin weight ratio), mold release agent: INT-PS125 0.8%. The post-heat treatment furnace temperature is 155°C. Other parameters are the same as in Example 1. The properties of the obtained sucker rod: interlaminar shear strength ILSS: 65Mpa, flexural strength: 1150Mpa, flexural modulus: 126Gpa, tensile strength: 2200Mpa, heat distortion temperature: 131°C.

Embodiment 3

[0035] Embodiment 3: the sucker rod prepared by the above-mentioned embodiment, wherein: carbon fiber: Panex33-48K of U.S. Zoltek Company, tensile strength 3.6pa, tensile modulus 236Gpa, account for about 60% of the volume fraction of the whole composite material, online Surface treatment furnace temperature: 375°C, the atmosphere is air, aramid fiberglass blended fabric: thickness 0.30mm, width 88mm, aramid fiber is Aksu Twaron-1100dtex-1000f, glass fiber is high-strength unsealed vinyl from Nanjing Fiberglass Institute Ester type 750dTex×3 bundles, warp yarn 8 / 10mm, weft yarn 7×2 / 10mm, plain weave. The matrix resin in the dipping tank contains: (by weight) 100 parts of Hetron922 vinyl ester resin, 1.4 parts of compound curing agent, 1.0 parts of release agent INT-PS-125, wherein the compound curing agent adopts: Perkadox-16: 0.2 parts, 0.4 parts of 2.5-bis(2-ethylhexanoylperoxy)-2.5-dimethylhexane, and 0.8 parts of Trigonox-C. The pultrusion speed is 1.5m / min, the three cur...

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Abstract

A continuous sucker rod made of fibre reinforced composition has a covered complex structure. Its covering layer uses the transversely arranged aramid fibres or ultrahigh-molecular polyethene fibres as weft and the glass fibres-aramid fibre or ultrahigh-molecular polyethene fibres band structure in longitudinal direction. Its preparing process includes such steps as dewinding fibres, surface treating, immersing in resin, covering solidifying, post-solidifying and twining. Its advantages are high strength and adhesion, and good antiwear nature.

Description

Technical field: [0001] The invention relates to a continuous sucker rod used in oil development and a pultrusion forming method thereof, in particular to a high-performance fiber / vinyl ester resin composite material sucker rod and a pultrusion cladding method. Background technique: [0002] Compared with traditional metal sucker rods, high-performance fiber-reinforced composite sucker rods have excellent properties such as low density, high strength, corrosion resistance, fatigue resistance, continuous coiling and over-stroke oil production, so they have become a sucker rod in oil production. Direction of development. For example, Chinese patent 99112384.0 discloses a "preparation method of flexible continuous flat-belt carbon fiber sucker rod and its joint", in which the sucker rod is made of carbon fiber and glass fiber as reinforcement materials, and epoxy resin is used as matrix material for pultrusion composite molding. The composite sucker rod has high strength, modu...

Claims

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Application Information

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IPC IPC(8): B32B1/00C08J5/06D01F11/16E21B17/00
Inventor 顾雪林杨小平常德友于运花李峰王成忠杜宾功李鹏
Owner 胜利油田孚瑞特石油装备有限责任公司
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