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A hybrid fiber reinforced thermoplastic resin composite sucker rod centralizer and its preparation method

A technology of resin composite materials and reinforced thermoplastics, which is applied in drill pipes, earthwork drilling, drilling equipment, etc., can solve the problems of metal shavings easy to get stuck in the pump, poor wear characteristics, hard metal materials, etc., to improve clamping stability, Effect of reducing wear and improving service life

Active Publication Date: 2019-07-12
咸阳恒兴高新复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the production method of oil production with rods is still used in oilfield work. With the extensive use of lightweight sucker rods made of new composite materials in oil fields, both the efficiency and quality of oil production have been greatly improved. The use of the main sucker rod still inevitably causes the friction problem caused by the eccentricity of the sucker rod and the oil pipe, especially the use of the flat belt sucker rod featuring carbon fiber composite materials. Since the matrix is ​​made of polymer materials, its The friction problem is often serious, so the solution to the problem of oil well eccentric wear of carbon fiber flat belt sucker rods has become the bottleneck of the large-scale application of this sucker rod. Simple, easy to operate and other advantages, it will soon become the main process technology of anti-eccentric wear
[0003] At present, the commonly used centralizers for carbon fiber composite flat belt sucker rods are mainly metal and plastic. Among them, the price of metal sucker rod centralizers is lower, high temperature resistance and easy processing, but because the metal material itself is relatively hard, The friction related to the pump is very large, and the metal shavings generated after the friction are easy to get stuck in the pump, causing secondary problems
The sucker rod centralizer made of plastic polymer has high impact resistance and corrosion resistance, but its wear resistance is poor, and it is not resistant to high temperature, so its application in high temperature oil wells is limited

Method used

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  • A hybrid fiber reinforced thermoplastic resin composite sucker rod centralizer and its preparation method
  • A hybrid fiber reinforced thermoplastic resin composite sucker rod centralizer and its preparation method
  • A hybrid fiber reinforced thermoplastic resin composite sucker rod centralizer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A mixture of T300 carbon fiber and S-type glass fiber is selected as the fiber reinforcement material, the fiber length is 1cm, the mixing ratio of T300 carbon fiber and S-type glass fiber is 1:3, and PP resin is used as the matrix to prepare a composite sucker rod centralizer. The whole centralizer is processed by injection molding, the injection molding temperature is 100°C, the molding pressure is 2MPa, and the content of fiber reinforced material is 5%;

[0033] The centralizer adopts a two-half symmetrical structure. There is a clamping groove with a thickness of 10mm, a width of 40mm and a length of 200mm inside the centralizer. The raised bar on the surface of the clamping groove increases the contact interface friction between the surface of the flat belt sucker rod and the surface of the holding groove. There is a rubber storage tank between the raised bars adjacent to the holding groove. When the centralizer is aligned , Adhesive glue can be stored in the glue...

Embodiment 2

[0036] A mixture of S-type glass fiber and basalt fiber is selected as the fiber reinforcement material, the fiber length is 2 cm, the mixing ratio of glass fiber and basalt fiber is 4:1, and nylon resin is used as the matrix to prepare a composite sucker rod centralizer. The whole centralizer is processed by injection molding, the injection molding temperature is 400°C, the molding pressure is 25MPa, and the content of fiber reinforced material is 20%;

[0037] The centralizer adopts a two-half symmetrical structure, and there is a clamping groove with a thickness of 3mm, a width of 10mm, and a length of 50mm on the inner side of the centralizer. The raised bar on the surface of the clamping groove increases the contact interface friction between the surface of the flat belt sucker rod and the surface of the holding groove. There is a rubber storage tank between the raised bars adjacent to the holding groove. When the centralizer is aligned , Adhesive glue can be stored in th...

Embodiment 3

[0040] The basalt fiber is selected as the fiber reinforced material, the fiber length is 1cm, and the thermoplastic PPS resin is used as the matrix to prepare the composite sucker rod centralizer. The whole centralizer is processed by injection molding, the injection molding temperature is 300°C, the molding pressure is 25MPa, and the content of fiber reinforced material is 12%;

[0041] The centralizer adopts a two-half symmetrical structure. There is a clamping groove with a thickness of 5mm, a width of 12mm, and a length of 52mm inside the centralizer. The raised bar on the surface of the clamping groove increases the contact interface friction between the surface of the flat belt sucker rod and the surface of the holding groove. There is a rubber storage tank between the raised bars adjacent to the holding groove. When the centralizer is aligned , Adhesive glue can be stored in the glue storage tank to prevent extrusion outflow. During the mating process, the single half...

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Abstract

The invention discloses a hybrid fiber reinforced thermoplastic resin composite material sucker rod centralizer. The hybrid fiber reinforced thermoplastic resin composite material sucker rod centralizer comprises a sucker rod centralizer main body, an anti-wear edge and a wear resistant layer, wherein the anti-wear edge is mounted on the outer surface of the sucker rod centralizer main body, and the surface of the anti-wear edge is wrapped with the wear resistant layer; the sucker rod centralizer main body and the anti-wear edge are made of hybrid fiber reinforced thermoplastic resin composite materials; the sucker rod centralizer main body is composed of two semi-symmetrical structures, chutes are formed in both sides of the surface of the sucker rod centralizer main body, a snap joint is mounted on one side of a single half of the centralizer, the two semi-symmetrical structures are combined to move along the chutes to, and after being combined, the two semi-symmetrical structures are fixed as a whole through the snap joints mounted symmetrically at the two ends; and a sucker rod clamping groove is formed inside the single half of the centralizer, a plurality of protruding horizontal bars are arranged on the surface of the sucker rod clamping groove, and a storage groove is formed between the adjacent protruding horizontal bars. The hybrid fiber reinforced thermoplastic resin composite material sucker rod centralizer makes full use of the comprehensive characteristics of high performance fibers, has good mechanical strength, toughness, rigidity, corrosion resistance and is long in service life.

Description

technical field [0001] The invention belongs to the technical field of oil recovery in oil fields, and in particular relates to a sucker rod centralizer made of hybrid fiber reinforced thermoplastic resin composite material and a preparation method thereof. Background technique [0002] At present, the production method of oil production with rods is still used in oilfield work. With the extensive use of lightweight sucker rods made of new composite materials in oil fields, both the efficiency and quality of oil production have been greatly improved. The use of the main sucker rod still inevitably causes the friction problem caused by the eccentricity of the sucker rod and the oil pipe, especially the use of the flat belt sucker rod featuring carbon fiber composite materials. Since the matrix is ​​made of polymer materials, its The friction problem is often serious, so the solution to the problem of oil well eccentric wear of carbon fiber flat belt sucker rods has become the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10B29C45/76B29C45/77B29C45/78
CPCB29C45/76B29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C2945/76765E21B17/1071E21B17/1085
Inventor 王永伟曹伟伟乔琨朱波
Owner 咸阳恒兴高新复合材料有限公司
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