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Shear-resisting abrasion-resisting and splitting-resisting carbon fiber continuous sucker rod

A carbon fiber and sucker rod technology, which is applied in the direction of drill pipe, coating, earthwork drilling, etc., can solve the problem of hard sand and impurities, carbon fiber sucker rod wear resistance, shear resistance and split resistance that cannot meet the above requirements Requirements, large bending degree of inflection point, etc., to reduce the probability of fracture, avoid splitting, and enhance the effect of cohesion

Active Publication Date: 2017-05-31
正弦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the existing technology, improvements have been made in the structure of the sucker rod, the choice of carbon fiber, and the winding method of the glass fiber to improve various performances of the sucker rod. The increasing complexity of geological conditions has also put forward higher requirements on the performance of sucker rods, such as hard sand and impurities in the oil pumping process due to downhole geology; when waxy crude oil flows through the wellbore due to temperature and The reduction of the pressure has formed a relatively serious wax deposition; under the conditions of complex mines, the curvature of the inflection point is relatively large, etc., these problems have caused the carbon fiber sucker rod in the prior art to suffer from wear resistance and shear resistance. and anti-split cannot meet the above requirements

Method used

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  • Shear-resisting abrasion-resisting and splitting-resisting carbon fiber continuous sucker rod
  • Shear-resisting abrasion-resisting and splitting-resisting carbon fiber continuous sucker rod
  • Shear-resisting abrasion-resisting and splitting-resisting carbon fiber continuous sucker rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] carbon fiber:

[0058]

[0059] glass fiber:

[0060] Fiber Strength Linear density Tensile modulus of elasticity water content content 2562MPa 2215Tex 88GPa 0.07％ 35.8wt%

[0061] Epoxy resin:

[0062]

[0063] The ultra-high-strength polyethylene fiber has a molecular weight of 3.5 million and a content of 8.2wt%, the wear-resistant material is alumina, and the content is 1.4wt%, and the length of the short basalt fiber is 12mm, and the content is 1.0wt%.

[0064] The specific preparation method is as follows:

[0065] Carbon fiber twisting pretreatment, as described in the above-mentioned specific implementation, adopts parallel air twisting, the shearing fixed length is 20cm, the lead-out length is 50cm, the twist is 2T / inch, the curing temperature is 160°C, and the pultrusion speed is 0.45 m / min.

[0066] The performance of the sucker rod that embodiment obtains is as follows:

[0067]

Embodiment 2

[0069] carbon fiber:

[0070]

[0071] glass fiber:

[0072] Fiber Strength Linear density Tensile modulus of elasticity water content content 2562MPa 2342Tex 92GPa 0.05％ 35.6wt%

[0073] Epoxy resin:

[0074]

[0075] The ultra-high-strength polyethylene fiber has a molecular weight of 4 million and a content of 7.5 wt%, the wear-resistant particles are aluminum oxide, and the content is 0.8 wt%, and the length of the short basalt fiber is 12 mm, and the content is 0.6 wt%.

[0076] The specific preparation method is as follows:

[0077] Carbon fiber twisting pretreatment, as described in the above-mentioned specific implementation, adopts parallel air twisting, the shearing fixed length is 20cm, the lead-out length is 50cm, the twist is 4T / inch, the curing temperature is 160°C, and the pultrusion speed is 0.45 m / min.

[0078] The performance of the sucker rod that embodiment obtains is as follows:

[0079]

Embodiment 3

[0081] carbon fiber:

[0082]

[0083] glass fiber:

[0084] Fiber Strength Linear density Tensile modulus of elasticity water content content 2646MPa 2278Tex 95GPa 0.07％ 32.3wt%

[0085] Epoxy resin:

[0086]

[0087] The ultra-high-strength polyethylene fiber has a molecular weight of 5 million and a content of 7.0wt%, the wear-resistant particles are aluminum oxide, and the content is 1.2wt%, and the length of the basalt short fiber is 15mm, and the content is 0.4wt%.

[0088] The specific preparation method is as follows:

[0089] Carbon fiber twisting pretreatment, as described in the above-mentioned specific implementation, adopts parallel air twisting, the shear fixed length is 20cm, the lead-out length is 50cm, the twist is 6T / inch, the curing temperature is 160°C, and the pultrusion speed is 0.5 m / min.

[0090] The performance of the sucker rod that embodiment obtains is as follows:

[0091]

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Abstract

The invention belongs to the field of oil production equipment of oil fields, in particular to a shear-resisting, abrasion-resisting and splitting-resisting carbon fiber continuous sucker rod. The carbon fiber continuous sucker rod comprises a carbon fiber core body, a glass fiber layer, an ultra-high strength polyethylene fiber layer and an epoxy resin layer which are arranged from inside to outside. The carbon fiber core body is composed of carbon fiber bundles, each carbon fiber bundle is bonded by epoxy resin, and basalt staple fibers are doped in the epoxy resin used for bonding each carbon fiber bundle. Each bundle of carbon fibers is composed by 12K-150K carbon fiber monofilament, and the carbon fiber monofilament is twisted in the processing process. The basalt staple fibers are doped in the epoxy resin used for bonding each carbon fiber bundle formed by twisting at least three strands of carbon fibers. The structure of the carbon fiber core body is redesigned, the carbon fiber bundle structure formed by twisting is adopted, the twist degree range in which the carbon fiber sucker rod performance is increased effectively is clear and definite, and the cohesion between the carbon fiber monofilament and the fiber bundles is effectively improved, so that splitting of the carbon fiber core body is effectively avoided.

Description

technical field [0001] The invention belongs to the field of oil production equipment in oil fields, and in particular relates to a carbon fiber continuous sucker rod which is resistant to shearing, abrasion and splitting. Background technique [0002] The sucker rod is a kind of equipment commonly used in the oil production process. During oil production, the pump rod of the downhole oil pump is driven to reciprocate up and down by the sucker rod, so as to pump the oil and other liquids in the formation to the ground. During use, it is usually necessary to connect the sucker rod to thousands of meters. In this case, the sucker rod has to bear its own suspension weight and the load of the oil pump, so it bears a relatively large pulling force. Existing sucker rods are mostly made of steel, but steel has physical defects such as heavy weight, easy corrosion, and easy wear, which makes the loss of sucker rods high. In addition, most of the existing sucker rods are segmented s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/00E21B17/10B29C70/52B29C47/02
CPCB29C48/154B29C70/52E21B17/00E21B17/1071
Inventor 席小平
Owner 正弦科技有限公司