High-temperature-resistant nano latex plugging anti-collapse agent for drilling fluid and preparation method thereof

The invention relates to the technical field of plugging anti-sloughing agents for drilling fluids, in particular to a high-temperature-resistant nano latex plugging anti-collapse agent for a drillingfluid and a preparation method thereof. The anti-collapse agent comprises the following raw materials: synthetic oil, polyethylene glycol, glycerol, acrylamide, vinyl acetate, epoxy chloropropane, N-vinylpyridine, a catalyst and water. Through polymerization reaction under a certain condition, the high-temperature-resistant nano latex plugging anti-collapse agent for the drilling fluid is obtained. The high-temperature-resistant nano latex plugging anti-collapse agent for the drilling fluid not only has good plugging anti-collapse performance, can block micro-pores and enter micro-cracks, forms a low-permeability sealing film, has a good filtrate loss reduction effect, but also has good temperature resistance, and can be applicable to drilling of various complex stratums. The high-temperature-resistant nano latex