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Nano silicon dioxide organic boron cross-linking agent and preparation method thereof

A technology of nano-silica and organic boron, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large amount of thickening agent, inability to meet the economic and effective development of tight oil and gas, and high residue, and achieve good exchange rate. Excellent connection performance and temperature resistance, low cost of raw materials, and simple preparation method

Active Publication Date: 2020-05-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, organoboron cross-linked HPG fracturing fluids generally have the disadvantages of large amount of thickener, high cost, high residue, and large damage, which cannot meet the economic and effective development of tight oil and gas. Therefore, new technologies are urgently needed to improve the performance of HPG fracturing fluids. Performance, reduce fracturing fluid damage

Method used

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  • Nano silicon dioxide organic boron cross-linking agent and preparation method thereof
  • Nano silicon dioxide organic boron cross-linking agent and preparation method thereof
  • Nano silicon dioxide organic boron cross-linking agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The steps of preparing nano silicon dioxide organoboron crosslinking agent are as follows:

[0051] The preparation steps of described linking agent are as follows:

[0052] Step 1) Add 4 mass parts of 30nm nano-silica to 100 mass parts of ethanol solvent, then ultrasonically half an hour to fully disperse the nano-silica, then add silane coupling agent 3-aminopropyltriethoxysilane 4 parts by mass, reflux reaction for 13 hours, and rotary evaporation to remove ethanol to obtain nano-silica whose surface is covalently modified as amino groups;

[0053] Step 2) Disperse the amino-modified silica into 40 parts by mass of methanol solution, then add 15 parts by mass of 2-formylphenylboronic acid, and stir and react at 25°C for 3.5 hours;

[0054] Step 3) Add 4 parts by mass of sodium borohydride to the solution in step 2, and react for 2 hours at 25° C. to obtain a dispersion containing nano-silica organoboron crosslinking agent. as attached figure 1 shown.

Embodiment 2

[0056] The steps of preparing nano silicon dioxide organoboron crosslinking agent are as follows:

[0057]Step 1) Add 6 mass parts of 30nm nano-silica to 100 mass parts of ethanol solvent, then ultrasonically half an hour to fully disperse the nano-silica, add silane coupling agent 3-aminopropyltriethoxysilane 6 Parts by mass, reflux reaction for 15 hours, rotary evaporation to remove ethanol, and obtain nano-silica whose surface is covalently modified as amino;

[0058] Step 2) Disperse the amino-modified silica into 40 parts by mass of methanol solution, then add 17 parts by mass of 3-formylphenylboronic acid, and stir and react at 30°C for 4 hours;

[0059] Step 3) Add 3 parts by mass of sodium borohydride to the solution in step 2, and react for 3 hours at 25°C to obtain a dispersion containing nano-silica organoboron crosslinking agent.

Embodiment 3

[0061] The steps of preparing nano silicon dioxide organoboron crosslinking agent are as follows:

[0062] Step 1) Add 8 mass parts of 30nm nano-silica to 100 mass parts of ethanol solvent, then ultrasonically half an hour to fully disperse the nano-silica, add 8 mass parts of silane coupling agent 3-aminopropyltriethoxysilane Parts, reflux reaction for 24 hours, rotary evaporation to remove ethanol, to obtain nano silicon dioxide whose surface is covalently modified as amino;

[0063] Step 2) Disperse the amino-modified silica into 40 parts by mass of methanol solution, then add 20 parts by mass of 4-formylphenylboronic acid, and stir and react at 28°C for 5 hours;

[0064] Step 3) Add 5 parts by mass of sodium borohydride to the solution in step 2, and react at 25° C. for 2.5 hours to obtain a dispersion containing nano-silica organoboron crosslinking agent.

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Abstract

The invention provides a nano silicon dioxide organic boron cross-linking agent and a preparation method thereof, wherein the nano silicon dioxide organic boron cross-linking agent is nano silicon dioxide with the surface modified with an organic boric acid group.

Description

technical field [0001] The application provides a nano-silica organoboron crosslinking agent and a preparation method thereof. Background technique [0002] As the thickener of water-based fracturing fluid, hydroxypropyl guar gum (HPG) has the characteristics of strong thickening ability, good shear resistance, good thermal stability, and strong fluid loss control ability, so it is widely used in domestic oil and gas fields Fracking. However, at present, organoboron cross-linked HPG fracturing fluids generally have the disadvantages of large amount of thickener, high cost, high residue, and large damage, which cannot meet the economic and effective development of tight oil and gas. Therefore, new technologies are urgently needed to improve the performance of HPG fracturing fluids. Performance, reduce fracturing fluid damage. Contents of the invention [0003] One of the present applications provides a nano-silicon dioxide organic boron crosslinking agent, which is a nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C08L5/00C08K5/55C08J3/24
CPCC09K8/685C09K8/887C09K8/905C09K8/90C08J3/24C08J2305/00C08K5/55
Inventor 贾文峰蒋廷学姚奕明陈作刘建坤魏娟明李洪春吴春芳徐胜强
Owner CHINA PETROLEUM & CHEM CORP
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