Filtration reducing agent for drilling fluid and preparation method thereof

A fluid loss reducing agent and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor fluid loss reduction effect and limited fluid loss reduction effect, and achieve good fluid loss effect, enhanced fluid loss, etc. Filtration reduction performance, the effect of good filtration reduction effect

Active Publication Date: 2014-09-10
新疆中经宏泰石油技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently commonly used fluid loss control agents can achieve a certain fluid loss effect, but their fluid loss control effects are limited and cannot meet higher requirements for fluid loss control, and they work in harsher environm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A fluid loss reducer for drilling fluid, comprising: 200 parts by weight of components: 200 parts of phenol, 50 parts of sodium chloroacetate, 50 parts of epichlorohydrin, 380 parts of formaldehyde, 80 parts of sodium metabisulfite, 80 parts of anhydrous sodium sulfate, hydrogen 65 parts of sodium oxide, 60 parts of trimethylamine, 36 parts of sodium 2-chloroethanesulfonate, 25 parts of carboxymethyl cellulose, 30 parts of acrylic amine, 28 parts of vinyl acetate, dimethyl diallyl ammonium chloride 30 parts, 800 parts of water.

[0019] The preparation method of the above-mentioned drilling fluid fluid loss reducer, the preparation steps are as follows:

[0020] Step 1, taking each component according to parts by weight;

[0021] Step 2, dissolve sodium hydroxide in 200 parts of water, raise the temperature to 70°C, add phenol, stir and react at 70 rpm for 40 minutes, then add sodium chloroacetate, continue to stir and react for 80 minutes, then cool down to 30°C, add ...

Embodiment 2

[0025] A fluid loss reducer for drilling fluid, comprising: 230 parts by weight of components: 230 parts of phenol, 54 parts of sodium chloroacetate, 52 parts of epichlorohydrin, 390 parts of formaldehyde, 88 parts of sodium metabisulfite, 82 parts of anhydrous sodium sulfate, hydrogen 68 parts of sodium oxide, 64 parts of trimethylamine, 37 parts of sodium 2-chloroethanesulfonate, 28 parts of carboxymethyl cellulose, 32 parts of acrylic acid amine, 30 parts of vinyl acetate, dimethyl diallyl ammonium chloride 32 parts, 860 parts of water.

[0026] The preparation method of the above-mentioned drilling fluid fluid loss reducer, the preparation steps are as follows:

[0027] Step 1, taking each component according to parts by weight;

[0028] Step 2, dissolve sodium hydroxide in 210 parts of water, raise the temperature to 72°C, add phenol, stir and react at 72 rpm for 50 minutes, then add sodium chloroacetate, continue to stir and react for 85 minutes, then cool down to 36°C,...

Embodiment 3

[0032] A fluid loss reducer for drilling fluid, comprising: 236 parts by weight of components: 236 parts of phenol, 57 parts of sodium chloroacetate, 53 parts of epichlorohydrin, 398 parts of formaldehyde, 92 parts of sodium metabisulfite, 85 parts of anhydrous sodium sulfate, hydrogen 70 parts of sodium oxide, 65 parts of trimethylamine, 38 parts of sodium 2-chloroethanesulfonate, 30 parts of carboxymethyl cellulose, 33 parts of acrylic acid amine, 32 parts of vinyl acetate, dimethyl diallyl ammonium chloride 33 parts, 880 parts of water.

[0033] The preparation method of the above-mentioned drilling fluid fluid loss reducer, the preparation steps are as follows:

[0034] Step 1, taking each component according to parts by weight;

[0035] Step 2, dissolve sodium hydroxide in 220 parts of water, raise the temperature to 75°C, add phenol, stir and react at 75 rpm for 50 minutes, then add sodium chloroacetate, continue to stir and react for 90 minutes, then cool down to 35°C,...

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PUM

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Abstract

The invention discloses a filtration reducing agent for a drilling fluid and a preparation method thereof. The filtration reducing agent comprises the components in parts by weight: 200-250 parts of phenol, 50-60 parts of sodium chloroacetate, 50-60 parts of epoxy chloropropane, 380-430 parts of formaldehyde, 80-100 parts of sodium metabisulfite, 80-90 parts of anhydrous sodium sulfate, 65-78 parts of sodium hydroxide, 60-70 parts of trimethylamine, 36-45 of sodium 2-chloroethanesulfonate, 25-35 parts of carboxymethyl cellulose, 30-40 parts of acrylic amine, 28-40 parts of vinyl acetate, 30-36 parts of dimethyl diallyl ammonium chloride, and 800-1000 parts of water. The preparation method comprises the steps of firstly dissolving sodium hydroxide in water, adding phenol and sodium chloroacetate, carrying out a reaction, then adding epoxy chloropropane and trimethylamine, continuing to carry out a reaction, after the reaction, adding other components, successively carrying out reactions, and carrying out spray drying on the finally-obtained mixture to obtain the filtration reducing agent product.

Description

technical field [0001] The invention belongs to the technical field of preparation of additives for oilfield exploitation, and in particular relates to a fluid loss control agent for drilling fluid and a preparation method thereof. Background technique [0002] During the drilling process, due to the pressure difference, the water in the drilling fluid will inevitably leak into the formation through the wellbore wall, causing the drilling fluid to lose water. As the water enters the formation, the clay particles in the drilling fluid adhere to the well wall to form a "filter cake", forming a filter cake well wall. Since the well wall of the filter cake is much denser than the original well wall, on the one hand, it prevents the drilling fluid from further dehydration, and on the other hand, it plays a role in protecting the well wall. However, during the formation of the filter cake wall, too much water is lost by filtration, the filter cake is too thick, and fine clay part...

Claims

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Application Information

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IPC IPC(8): C09K8/035
CPCC09K8/03
Inventor 李祥国
Owner 新疆中经宏泰石油技术服务有限公司
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