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A kind of hybrid fiber three-dimensional braided thermosetting resin matrix composite material sucker rod centralizer and preparation method thereof, sucker rod

A technology of three-dimensional weaving and mixed fibers, which is applied to braids, drill pipes, earthwork drilling and mining, etc., can solve problems such as cracks, poor fiber interface bonding, centralizer defects, etc., and achieve corrosion resistance and life. The effect of improving the strength of liquid connection and the mechanical strength and stiffness of interlayer bonding

Active Publication Date: 2018-11-30
SHANDONG ZHONGHENG CARBON FIBER TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current centralizers are mainly made of metal or injection-molded polymer composite materials. The centralizers of these two materials have their own advantages but also have unavoidable problems. Among them, the friction and wear of metal centralizers is still limited by the material. The injection molding process of composite centralizers inevitably makes the reinforcing fibers must be in the form of chopped strands. When the downhole high temperature and high pressure reciprocating friction will inevitably lead to poor bonding of the fiber interface inside the main structure of the centralizer, long-term use will inevitably cause defects or failures in the centralizer. cracks appear

Method used

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  • A kind of hybrid fiber three-dimensional braided thermosetting resin matrix composite material sucker rod centralizer and preparation method thereof, sucker rod
  • A kind of hybrid fiber three-dimensional braided thermosetting resin matrix composite material sucker rod centralizer and preparation method thereof, sucker rod
  • A kind of hybrid fiber three-dimensional braided thermosetting resin matrix composite material sucker rod centralizer and preparation method thereof, sucker rod

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Experimental program
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Effect test

Embodiment approach

[0030] The specific structural implementation of the new three-dimensional braided composite centralizer based on the present invention is as follows:

[0031] The mixed three-dimensional braided fiber reinforced thermosetting resin composite sucker rod centralizer adopts a two-half structure, and one side of the centralizer is provided with a metal convex ball chute and a pair of metal buckles. When combined, the metal buckles To complete the alignment of the two halves of the split structure, the centralizer moves along the metal convex ball chute to ensure accurate positioning.

[0032] After the centralizer is aligned and positioned, the clamping cavity with a thickness of 6 mm, a width of 13 mm and a length of 115 mm on the inner surface is in close contact with the flat belt type carbon fiber composite sucker rod. There is a zigzag friction strip in the clamping cavity. There are multiple sets of spherical rubber storage tanks between the friction strips to ensure the fr...

Embodiment 2

[0036] The specific structural implementation of novel composite material centralizer based on the present invention is as follows:

[0037] The mixed three-dimensional braided fiber reinforced thermosetting resin composite sucker rod centralizer adopts a two-half structure, and one side of the centralizer is provided with a metal convex ball chute and a pair of metal buckles. When combined, the metal buckles To complete the alignment of the two halves of the split structure, the centralizer moves along the metal convex ball chute to ensure accurate positioning.

[0038] After the centralizer is aligned and positioned, the clamping cavity with a thickness of 10mm, a width of 40mm, and a length of 100mm is in close contact with the flat belt type carbon fiber composite sucker rod on the inner surface. There is a zigzag friction strip in the clamping cavity. There are multiple sets of spherical rubber storage tanks between the friction strips to ensure the friction and gluing be...

Embodiment 3

[0042] The specific structural implementation of novel composite material centralizer based on the present invention is as follows:

[0043] The mixed three-dimensional braided fiber reinforced thermosetting resin composite sucker rod centralizer adopts a two-half structure, and one side of the centralizer is provided with a metal convex ball chute and a pair of metal buckles. When combined, the metal buckles To complete the alignment of the two halves of the split structure, the centralizer moves along the metal convex ball chute to ensure accurate positioning.

[0044] After the centralizer is aligned and positioned, the clamping cavity with a thickness of 8mm, a width of 40mm, and a length of 200mm is in close contact with the flat belt type carbon fiber composite sucker rod on the inner surface. There is a zigzag friction strip in the clamping cavity. There are multiple groups of spherical rubber storage tanks between the zigzag friction strips to ensure the friction and g...

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Abstract

The invention discloses a hybrid-fiber three-dimensional-braided thermosetting-resin-matrix-composite-material oil-pumping-rod centralizer. The hybrid-fiber three-dimensional-braided thermosetting-resin-matrix-composite-material oil-pumping-rod centralizer comprises an oil-pumping-rod centralizer body, anti-wear edges arranged on the outer surface of the oil-pumping-rod centralizer body and wear-resistant layers with which the surfaces of the anti-wear edges are coated. The oil-pumping-rod centralizer body, the anti-wear edges and the wear-resistant layers are formed in the mode that fiber three-dimensional braided fabrics and modified thermosetting resin are impregnated; the oil-pumping-rod centralizer body is of an oppositely-inserted two-half structure, a plurality of metal protruding balls are embedded into the oppositely-jointed sliding groove position of a single structure unit, metal buckles are embedded into the oppositely-jointed end, and the oil-pumping-rod centralizer body and the buckles are fixedly and integrally designed through the sliding grooves; an oil-pumping-rod clamping cavity is formed in the inner side of the oil-pumping-rod centralizer body, and is internally provided with a zigzag friction strip and sphere glue storing grooves. By means of the hybrid-fiber three-dimensional-braided thermosetting-resin-matrix-composite-material oil-pumping-rod centralizer, the interfacial defects of the centralizer body structure is effectively overcome, the whole mechanical strength, the rigidity, the wear resistance and the corrosion resistance of the centralizer are effectively improved, and the service life of the centralizer is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of oil production engineering, and in particular relates to a sucker rod centralizer made of hybrid fiber three-dimensional braided thermosetting resin-based composite material. Background technique [0002] The sucker rod is an important part of engineering equipment in the field of oil production, and the normal operation of the sucker rod directly affects the efficiency and quality of oil production. The traditional metal sucker rod has a large weight and poor corrosion resistance, while the polymer sucker rod has low density, small weight and strong corrosion resistance, and has become an important substitute for oilfield engineering. However, due to the The well fluid in the development and production of heavy oil, thin oil and high pour point oil generally has physical and chemical characteristics such as high water content and high salinity, and the eccentric wear of oil well rods and tubes caused by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10D04C1/02
CPCD04C1/02D10B2101/00D10B2101/02D10B2101/06D10B2101/12D10B2101/16D10B2321/0211D10B2331/021E21B17/1085
Inventor 朱波曹伟伟乔琨王永伟
Owner SHANDONG ZHONGHENG CARBON FIBER TECH DEV CO LTD