Abstract
This article presents the results of experimental data on the preparation of a composite heatresistant reagent for drilling fluids, including a modified copolymer based on polyacrylonitrile (PAN, by hydrolysis in the absence of a mixture of sodium hydroxide) and vinylsulfonic acid. A thermally stable composite reagent to polyvalent cations has been obtained, which reduces filtration and improves the anti-wear properties of clay suspensions. The thermal stability of the synthesized water-soluble polymers was determined by the results of thermogravimetric tests performed on a derivatograph. The ratio of monomers and modification conditions are selected, this ensures a high conversion of monomers, and also increases the yield of the final product. The synthesized polymer of acrylonitrile and in the presence of fatty acids of gossypol resin and sulfuric acid in the pH range = 3.5-5.5, with subsequent modification. The synthesized water-soluble polymer has a diphilic structure throughout the structure, the macromolecules of which contain a hydrophobic group and a hydrophilic part. They are able to adsorb and lower the interfacial free energy, which allows them to be classified as high-molecular surfactants.
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