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Preparation method and device of eccentric wear prevention pumping rod

A sucker rod and anti-eccentric wear technology, which is applied in the direction of drill pipe, earthwork drilling, drilling equipment, etc., can solve the problem of reducing the continuous coating cost and process complexity, low bonding strength between sucker rod and anti-wear block, The partial wear resistance of the cladding layer is not ideal enough to achieve the effect of reducing material cost, high strength and ensuring strength

Inactive Publication Date: 2009-04-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sucker rod adopts a one-time overall processing method of pultrusion and coating, (including wire drawing-on-line surface treatment-impregnating resin glue-coating layer coating-preforming-curing-post-curing-coiling process) the coating layer If it is a fabric, it not only increases the material cost, but also the partial wear resistance of the overall fabric covering is not ideal
And for continuous sucker rods made of carbon fiber reinforced composite materials, special downhole operation equipment must be used in the application, and the development of special downhole operation equipment is relatively difficult, which has become a technical bottleneck in the application of continuous sucker rods made of carbon fiber reinforced composite materials, especially in recent years. Later, with the soaring price of carbon fiber, the cost of raw materials has risen sharply, thus limiting the large-scale promotion and application of this product
CN1417449A discloses a preparation method of an anti-wear sucker rod. The method is to secondary injection mold a wear-resistant block made of nylon and other materials on the formed sucker rod body to reduce the use of coating materials and reduce the cost of continuous coating and process complexity, but the secondary injection molding process and the characteristics of different materials lead to low bonding strength between the sucker rod and the anti-wear block, which cannot meet the long-life service requirements of the sucker rod

Method used

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  • Preparation method and device of eccentric wear prevention pumping rod
  • Preparation method and device of eccentric wear prevention pumping rod
  • Preparation method and device of eccentric wear prevention pumping rod

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: A plurality of bundles of carbon fiber filaments are put into the surface treatment furnace through the wire rack and the wire hole of the wire collecting plate. The furnace temperature is 120°C, and the pulling speed is 0.4 m / min. The mass fraction of isophthalic unsaturated polyester resin S-685S:MEKP:BPO:zinc stearate in the tank is 100:1.5:1.5:1.5. The impregnated carbon fiber enters the preforming furnace with a preforming temperature of 85°C. After the initial gel preforming, it enters the mold for curing and molding. The mold is heated in three stages at temperatures of 110°C, 135°C, and 155°C. The formed composite material rod continues to advance longitudinally at a speed of 0.4 m / min, and two bundles of aramid fibers are wound on the composite material rod at a speed of 5 turns / min by a winding machine with 2 heads to form two threads with a pitch of 10 mm. Spiral tendons. The impregnation formula of the aramid fibers is the same as that of the pul...

Embodiment 2

[0035] Embodiment 2: According to implementation 1, change the carbon fiber in the pultrusion process to high-strength glass fiber, the furnace temperature of fiber heat treatment is 100 ° C, the pulling speed is 0.2 m / min, and the resin in the dipping tank is changed to epoxy resin, wherein E -51: Methyltetrahydrophthalic anhydride: DMP-30: Zinc stearate with a weight fraction of 100:85:2.0:1. The formed sucker rod is wound by a 6-head winding machine at a speed of 2.5 turns / min. Bunches of PBO fibers are formed to form six helical tendons with a pitch of 5 mm. The impregnation formula of the PBO fiber is the same as that of the pultrusion process, and the diameters of the six bundles of PBO fibers are all 1 mm. The composite sucker rod body after the anti-eccentric wear layer is wound and formed is glued to the metal joint. The adhesive used is an epoxy adhesive. The mass fraction of epoxy resin: curing agent: accelerator: filler is 100:80:1.5:15 , The viscosity at 25°C is ...

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Abstract

The invention relates to a method for preparing a composite material sucker rod which can prevent camber wear and a device thereof. Combining pultrusion and winding, fibre is immersed by resin matrix, and the composite material sucker rod is prepared by pultrusion, curing and shaping; the surface of the rod body is continuously wound with wearing fibre immersed by resin matrix glue after shaping; the rod body of the sucker rod, the surface of which is provided with a camber wear preventing layer of a spiral bar shape is obtained by curing; the rod body of the sucker rod is cut to be in fixed length, is connected with a metal joint by glue, and is treated in a joint curing furnace; the whole sucker rod is stretched by inherent stress. The surface of the rod body of the sucker rod is provided with the camber wear preventing layer of a spiral bar shape, thus having excellent camber wear preventing performance while ensuring a high intensity of the sucker body; the inverse cone structure of the metal joint and the pressure injection glue connection process ensure the joint part has the properties of high intensity and fatigue proof, the service life of which is consistent with the composite material rod body, and the reliability of the products is greatly improved.

Description

technical field [0001] The invention relates to a method and a device for preparing a sucker rod for mechanical oil recovery in an oil field, in particular to a method and a device for preparing a high-strength anti-eccentric wear composite sucker rod by a pultrusion and winding process. Background technique [0002] Due to the increasingly complex types of reservoirs being developed, the continuous increase in well depth and the continuous deterioration of the well environment, composite material sucker rods have begun to gradually replace traditional metal sucker rods. The composite sucker rods currently used mainly include traditional fiberglass sucker rods and carbon fiber reinforced composite continuous sucker rods. The traditional FRP sucker rod is prepared by pultrusion process of glass fiber reinforced thermosetting resin, which has been widely used. However, with the continuous improvement of the reliability requirements of modern oil production, this traditional FR...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D31/00B29C70/52B29C53/56B29C65/48B29C71/00E21B17/00B29K105/08B29K63/00B29K31/00B29K309/08B29D99/00
Inventor 杨小平李鹏杜中杰崔昌瑞赵秀平于运花
Owner BEIJING UNIV OF CHEM TECH
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