High-temperature resistant drilling fluid of Sodium-based rectorite modified by organic laponite

Polymer–SiO2/Laponite Composite as a Filtrate Reducer for High-Temperature and High-Salt Drilling Fluids

“…In solution, LAP surfaces exhibit a permanent negative charge, with edge charges capable of forming a “house of cards” structure . LAP serves as a dispersant, suspending agent, and viscosifier, demonstrating excellent high-temperature performance when combined with bentonite-based slurries. − Furthermore, LAP can adsorb onto polymer chains via electrostatic interactions and hydrogen bonding , or be incorporated into the spatial network structure of polymers through graft copolymerization, , enhancing polymer thermal stability. This stabilizes the spatial network structure among drilling fluid constituents, resulting in improved filtration and rheological performance of drilling fluids under high-temperature, high-salt conditions. , …”