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High-strength coated quartz sand, and preparation technology and preparation device thereof

A quartz sand and high-strength technology, which is applied in the fields of mining fluids, wellbore/well components, earthwork drilling, etc., can solve the problems of short shelf life of coated sand products, low strength of quartz sand, high manufacturing cost, etc., and is easy to promote and use, high degree of automation and low maintenance cost

Inactive Publication Date: 2019-06-07
河南祥盛陶粒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the low strength of the currently used quartz sand leading to a small range of use, and the problems of the existing coated sand products having a short shelf life and high manufacturing costs, the present invention provides a high-strength coating that can still reduce costs and reduce costs. Preparation process of quartz sand strength

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  • High-strength coated quartz sand, and preparation technology and preparation device thereof
  • High-strength coated quartz sand, and preparation technology and preparation device thereof
  • High-strength coated quartz sand, and preparation technology and preparation device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: The high-strength coated sand of the present embodiment consists of 12kg of quartz sand, 3.25kg of modified phenolic resin, 1.25kg of modified bismaleimide resin, 0.5kg of silicon ether resin, and 1.2kg of ultra-short glass fiber powder , antioxidant 8kg, urotropine 1kg, organosilane 1 kg and talcum powder 0.1kg.

[0028] The preparation process of the high-strength coated quartz sand in this embodiment includes the following steps.

[0029] (1) Accurately weigh the above raw materials by weight, and mix the modified phenolic resin, modified bismaleimide resin and silicon ether resin evenly to obtain a mixed resin for use.

[0030] (2) Then filter the original quartz sand through a 80-16 mesh sieve to obtain coarse sand; then the coarse sand is processed by pickling, cleaning and drying equipment to obtain the supporting layer quartz sand, and the pickling uses hydrogen peroxide and A mixture of concentrated sulfuric acid 1:2-3, washed repeatedly with cle...

Embodiment 2

[0034] Embodiment 2: The high-strength coated quartz sand of the present embodiment comprises the following components: 10kg of quartz sand, 2.6kg of modified phenolic resin, 1kg of modified bismaleimide resin, 0.4kg of silicon ether resin, ultra-short glass Fiber powder 1 kg, polyisocyanate 0.8 kg, organosilane 0.5 kg, calcium sodium stearate 0.08 kg.

[0035] The preparation process of the high-strength coated quartz sand in this embodiment includes the following steps.

[0036] (1) Accurately weigh the above raw materials by weight, and mix the modified phenolic resin, modified bismaleimide resin and silicon ether resin evenly to obtain a mixed resin for use.

[0037] (2) The coarse sand is treated with pickling, cleaning and drying equipment to obtain the supporting layer of quartz sand. The pickling uses a mixture of hydrogen peroxide and concentrated sulfuric acid 1:2-3, repeated washing with water 4 times, filtering and drying Dry until the moisture content is below 0....

Embodiment 3

[0041] Embodiment 3: The high-strength coated quartz sand of this embodiment includes the following raw materials: 7kg of quartz sand, 0.65kg of modified phenolic resin, 0.25kg of modified bismaleimide resin, 0.1kg of silicon ether resin, ultra-short Glass fiber powder 1.5 kg, polyisocyanate 0.3 kg, urotropine 0.2 kg, organosilane KH550 0.5 kg, calcium stearate 0.08 kg.

[0042] The preparation process of the high-strength coated quartz sand in this embodiment includes the following steps.

[0043] (1) Accurately weigh the above raw materials by weight, and mix the modified phenolic resin, modified bismaleimide resin and silicon ether resin evenly to obtain a mixed resin for use.

[0044] (2) Then put the quartz sand into a glass container, add a mixture of hydrogen peroxide and concentrated sulfuric acid, stir for 13 minutes, then filter, repeat washing 5 times, filter, and dry until the moisture content is lower than 0.5%.

[0045] (3) Heat the quartz sand to 200°C and pour...

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Abstract

The invention relates to a high-strength coated quartz sand, and a preparation technology and a preparation device thereof. The high-strength coated quartz sand comprises, by weight, 70-120 parts of quartz sands, 10-50 parts of mixed resin, 10-15 parts of ultra-short glass fiber powder, 5-10 parts of a curing agent, 1-10 parts of organosilane and 0.5-1 part of a lubricant. The quartz sands are chemically treated during preparation to change the surface roughness, and a coupling agent is added to enhance the interfacial bonding strength between a coating layer and the quartz sands through chemical bonds; a plurality of resins are combined in proportion, and are combined with the alkali-free ultra-short glass fiber powder to further enhance the strength of the resin, so the strength of the coated sand is enhanced; the lubricant can avoid the adhesion between sand bodies in order to keep particles from sticking to each other; and the raw materials are easy to obtain and are cheap, the technology is simple, and the prepared coated sand has good sphericity and high strength, and is easy to promote and use.

Description

technical field [0001] The invention belongs to the technical field of film-coated proppants, and in particular relates to a preparation technology for manufacturing high-strength film-coated quartz sand with low-cost materials. Background technique [0002] In the deep mining of oil and natural gas, during the fracturing construction process, it is necessary to use proppant and high-pressure solution to enter the formation to fill in the rock fractures, so that the rock fractures around the wellbore continue to open, forming a channel with high-level flow capability so that oil and gas products can be smoothly pass. With the development of the domestic economy, oil and gas exploration technology is gradually mature, and the demand for proppant is also increasing. Therefore, the industry of fracturing proppant is also gradually developed, but overall, the export volume is still smaller than the import volume. And the products are mainly concentrated in low-end products with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
Inventor 许松林张纯现李经三张建中马俊伟
Owner 河南祥盛陶粒有限公司
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