Method for preparing filtrate loss controller for drilling fluid by using styrene-acrylonitrile copolymer foamed plastic waste

A technology of foam plastics and drilling mud, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of no fluid loss control agent in drilling mud, etc., and achieve improved cuttings-carrying ability, simple reaction route, and easy preparation high efficiency effect

Inactive Publication Date: 2010-06-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no patent report on treating styrene-acrylonitrile copolymer with sulfonated hydrolysis modification as a fluid loss control agent for drilling

Method used

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  • Method for preparing filtrate loss controller for drilling fluid by using styrene-acrylonitrile copolymer foamed plastic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Adopt the following mass parts raw materials: 10 parts of styrene-acrylonitrile copolymer foam plastic waste (styrene: acrylonitrile monomer molar ratio=70: 30), 80 parts of 98% vitriol oil; Styrene-acrylonitrile copolymer foam After the plastic waste is purified and pulverized, concentrated sulfuric acid is added according to the ratio, fully stirred, and reacted at 85°C for 5 hours. The obtained product is filtered to separate the waste acid, washed with water, dried and pulverized to obtain a sulfonated hydrolyzate. The product is Dark brown powder. Add the product into the base slurry in batches under stirring conditions, the color of the base slurry becomes darker and the viscosity increases. When the product addition was mass fraction 1%, the apparent viscosity 35mpa s was recorded in the fresh water base slurry (bentonite mass fraction is 8%, the same below) at normal temperature, and the API water loss 10ml; Salt water base slurry (bentonite mass fraction is 8%...

Embodiment 2

[0017] Adopt the following mass parts raw materials: 10 parts of styrene-acrylonitrile copolymer foam plastic waste (styrene: acrylonitrile monomer molar ratio=10: 90), 100 parts of 90% vitriol oil; Styrene-acrylonitrile copolymer foam After the plastic waste is purified and pulverized, concentrated sulfuric acid is added according to the ratio, fully stirred, and reacted at 90°C for 7 hours. The obtained product is filtered to separate the waste acid, washed with water, dried and pulverized to obtain a sulfonated hydrolyzate. The product is Dark brown powder. Add the product into the base slurry in batches under stirring conditions, the color of the base slurry becomes darker and the viscosity increases. When the product addition amount is 1% by mass fraction, the apparent viscosity in the freshwater base pulp is 38mpa·s and the API water loss is 8ml; the apparent viscosity in the salt water base pulp is 34mpa·s and the API water loss is 12ml.

[0018] The temperature resist...

Embodiment 3

[0023] Adopt the following mass parts raw materials: 10 parts of styrene-acrylonitrile copolymer foamed plastic waste (styrene: acrylonitrile monomer molar ratio=60: 40), 20 parts of cyclohexane, 80 parts of 98% concentrated sulfuric acid; Styrene - The acrylonitrile copolymer foam plastic waste is purified and pulverized, fully swelled in cyclohexane at 60°C, added a metered amount of concentrated sulfuric acid, and reacted at 70°C for 2 hours. Separation of waste acid by filtration, washing with water, drying and crushing to obtain sulfonated hydrolyzate, the product is dark brown powder. Add the product into the base slurry in batches under stirring conditions, the color of the base slurry becomes darker and the viscosity increases. When the product addition amount is 1% by mass fraction, the apparent viscosity in the freshwater base pulp is 36mpa·s, and the API water loss is 12ml; the apparent viscosity in the salt water base pulp is 33mpa·s, and the API water loss is 14ml...

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Abstract

The invention relates to a method for preparing filtrate loss controller for drilling fluid by using styrene-acrylonitrile copolymer foamed plastic waste. The styrene-acrylonitrile copolymer foamed plastic waste is taken as raw material, and the adopted raw materials based on parts by weight in the preparation process comprise: 10 parts of styrene-acrylonitrile copolymer foamed plastic waste, 60-100 parts of concentrated sulfuric acid and 0-40 parts of organic solvent. According to the mixture ratio, the raw materials are evenly mixed together and stirred for 2-7h at 70-100 DEG C, and the products are separated and purified, so that dark brown powder product can be obtained. The product has high water absorptivity and takes on amber gelatinous shape after absorbing water; the product is not dissolved in the water when in water absorption saturation, and is proved to have the properties of filtrate loss reduction, salt resistance and temperature resistance by cement slurry filtrate loss controlling test, thus being taken as the filtrate loss controller for the drilling fluid; furthermore, the product has low cost, simple production technique and excellent performance, and has certain competitive advantage compared with the similar products of the market.

Description

technical field [0001] The invention belongs to the field of waste utilization and processing, and relates to a method for preparing drilling mud fluid loss control agent by using styrene-acrylonitrile copolymer foam plastic waste. Background technique [0002] With the development of the petroleum industry and the expansion of oil and gas exploration and development areas, the oil and gas layers that people exploit are getting deeper and deeper, the geological conditions are becoming more and more complex, and the mining difficulty is becoming more and more difficult. From drilling, cementing, fracturing and acidizing, to the final Oilfield chemicals play a vital role in all aspects of oil and gas production. The rise of bottom hole temperature, pressure and salinity put forward higher requirements on the performance of drilling mud. Drilling mud fluid loss additives play an important role in oilfield chemicals. Common fluid loss additives for drilling mud mainly include ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08F220/44C08F212/10C08F8/36C08F8/12
Inventor 刘晓非曾安蓉李琳王琪
Owner TIANJIN UNIV
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