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Method for preparing modified sulfonated phenolic resin for drilling fluids

A technology of sulfonated phenolic resin and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor inhibition, low use efficiency, poor performance stability, etc., and achieve the effect of expansion inhibition

Active Publication Date: 2013-02-06
四川景文材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problems of low use efficiency, poor inhibition and poor performance stability when the sulfonated phenolic resin prepared by conventional methods is used in a high-temperature, high-pressure, high-salinity environment.

Method used

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  • Method for preparing modified sulfonated phenolic resin for drilling fluids

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Comparison scheme
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Embodiment 1

[0049] A preparation method of modified sulfonated phenolic resin for drilling fluid, comprising the steps of:

[0050] (1) React 80 parts by mass of phenol, 111 parts by mass of 37% formaldehyde aqueous solution (including 41 parts by mass of pure formaldehyde), and 1.9 parts by mass of potassium hydroxide at 50°C for 20 min;

[0051] (2) Add 33.0 parts by mass of sodium bisulfite and stir to dissolve;

[0052] (3) After dissolving, add 62.2 parts by mass of sodium p-aminobenzenesulfonate at the same time, then raise the temperature of the reaction to 80 °C and keep the temperature constant for 1 hour;

[0053] (4) Add 10.2 parts by mass of silicic acid, continue at 80°C, add water once every 60 minutes, add water twice, that is, the reaction is over, and the liquid product is spray-dried to obtain a solid product.

Embodiment 2

[0055] A preparation method of modified sulfonated phenolic resin for drilling fluid, comprising the steps of:

[0056] (1) 110 parts by mass of phenol, 216 parts by mass of 37% formaldehyde aqueous solution (including 80 parts by mass of pure formaldehyde), and 8.0 parts by mass of potassium hydroxide were reacted at 70°C for 60 min;

[0057] (2) Add 110.6 parts by mass of sodium bisulfite, stir to dissolve;

[0058] (3) After dissolving, add 207 parts by mass of sodium p-aminobenzenesulfonate at the same time, then raise the temperature of the reaction to 120°C and keep the temperature constant for 3 hours;

[0059] (4) Add 51.0 parts by mass of silicic acid, continue to add water once every 60 minutes at 120°C, and add water 4 times, that is, the reaction is over, and the liquid product is spray-dried to obtain a solid product.

Embodiment 3

[0061] A preparation method of modified sulfonated phenolic resin for drilling fluid, comprising the steps of:

[0062] (1) React 90 parts by mass of phenol, 120 parts by mass of 37% formaldehyde aqueous solution (including 44 parts by mass of pure formaldehyde), and 2.5 parts by mass of potassium hydroxide at 55°C for 30 min;

[0063] (2) Add 40.0 parts by mass of sodium bisulfite, stir to dissolve;

[0064] (3) After dissolving, add 70 parts by mass of sodium p-aminobenzenesulfonate at the same time, then raise the temperature of the reaction to 90°C and keep the temperature constant for 1h;

[0065] (4) Add 15 parts by mass of silicic acid, continue at 90°C, add water once every 60 minutes, add water twice, that is, the reaction is over, and the liquid product is spray-dried to obtain a solid product.

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Abstract

The method discloses a method for preparing a modified sulfonated phenolic resin for drilling fluids. The method includes the following steps of firstly, subjecting phenol, formaldehyde and potassium hydroxide to reaction at the temperature of 60+ / -10 DEG C for 20-60 minutes; secondly, adding sodium bisulfite and stirring the mixture to dissolve the sodium bisulfite; thirdly, simultaneously adding sodium sulfanilate after dissolution, heating the reaction to the temperature of 100 DEG C+ / -20 DEG C, and keeping the temperature for 1-3 hours; and fourthly, adding silicic acid, adding water for 2-4 times per 60 minutes at the temperature of 100 DEG C+ / -20 DEG C to finish the reaction, and subjecting a liquid product to spray drying to obtain a solid product. By means of the method, the prepared modified sulfonated phenolic resin can still keep stable performances in high-temperature, high-pressure and high-mineralization-degree operation environments and has excellent high temperature resistant and salt tolerance performances, oil field drilling wells can be effectively used under conditions of high temperatures and high salinity, and expansion of slurries can be inhibited to a certain extent.

Description

technical field [0001] The invention relates to a preparation method of modified sulfonated phenolic resin for drilling fluid. Background technique [0002] Sulfonated phenolic resin is an anionic water-soluble polyelectrolyte with strong heat and salt resistance. It can be used together with SMC, SMT, SAS, etc. to prepare a "three-sulfon drilling fluid" system, which is an ideal high-temperature deep well drilling fluid system one. However, in recent years, as the world's oil exploration and development gradually develop into deep formations and offshore, the formations encountered are becoming more and more complex, and higher requirements are placed on the stability of drilling fluids in high-temperature and high-salinity environments. Currently, the sulfonated phenolic resin produced by the existing production process has the defects of low use efficiency, poor inhibition and poor use effect in medium-deep and shallow well sections, which can no longer meet the high tem...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08G8/10C09K8/24
Inventor 陶蓉李露武迪蒙王朝余曹海波王维平
Owner 四川景文材料科技有限公司