Nanomaterial-containing friction reducer for water-based drilling fluid, and preparation method therefor

A preparation method for a nanomaterial-containing friction reducer for water-based drilling fluid, comprising the following steps:

• S1, selecting rapeseed oil as a raw material of base oil, and introducing sulfur ions into a structure through modification to prepare sulfurized rapeseed oil base oil;
• S2, selecting aluminum oxide, ferric oxide and magnesium oxide to produce esterification under high-temperature catalysis, putting a friction reducer sample into a preheated water bath kettle, and adding glyceryl stearate prepared in advance into the friction reducer to adjust a viscosity of the drilling fluid after the friction reducer is added into the drilling fluid, so as to prepare an additive;
• S3, adding N-hydroxysuccinimide into N,N-dicyclohexylcarbodiimide under water-bath heating, enabling the N-hydroxysuccinimide to react with the N,N-dicyclohexylcarbodiimide to generate active ester, and then adding the activated N-hydroxysuccinimide into rapeseed oil containing nano-tungsten disulfide for stirring and reaction under oil-bath heating to prepare N-hydroxysuccinimide-modified nano-tungsten disulfide;
• and
• S4, slowly adding the additive obtained in S2 and the N-hydroxysuccinimide-modified nano-tungsten disulfide obtained in S3 into the sulfurized rapeseed oil base oil preheated in an oil bath kettle in proportion, and performing stirring for reaction to prepare the friction reducer for the water-based drilling fluid.