High-molecular polymer drilling fluid additive based on plant polyphenol as well as preparation method and application of high-molecular polymer drilling fluid additive

• Main Authors: HAN CHUNRUI, GUO XUYING, YAN LIUXIN, LIANG FENGQIAN
• Format: Patent
• Language: Chinese; English
• Published: 05.12.2023
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to the technical field of petrochemical engineering, in particular to a high-molecular polymer drilling fluid additive based on plant polyphenol and a preparation method and application of the high-molecular polymer drilling fluid additive. Unsaturated olefin with the carbon atom number being 12-20 and an unsaturated polar organic compound are adopted for conducting graft modification on the plant polyphenol, and the high-molecular polymer drilling fluid additive is obtained. A long-chain alkyl group of unsaturated olefin with the carbon atom number of 12-20 can improve the lipophilicity of the drilling fluid additive, so that the stability of the drilling fluid is improved; a polar group of the unsaturated polar organic compound can improve the rigidity of a molecular main chain and is beneficial to formation of hydrogen-bond interaction, so that the high temperature resistance, viscosity reduction stability and filtrate loss reduction performance of the drilling fluid are improved, and