The invention discloses a preparation method of an iron-based solid sulfur removal agent for oil-based drilling fluids, comprising the following steps: soaking iron powder in an oxidizing solution to obtain oxidized modified iron powder; uniformly spreading easily ionizable salts on the surface of the oxidized modified iron powder, and performing natural reaction in air to obtain a porous iron-based compound; subjecting the porous iron-based compound to first heating and stirring treatment; adding dispersant and performing second heating and stirring treatment; cooling and keeping warm; conveying the obtained mixture to a twin-screw extruder with the same holding temperature for extrusion and granulation to obtain the iron-based solid sulfur removal agent. The sulfur removal rate of the iron-based solid sulfur removal agent of the invention is ≥95%, it has good oil solubility and good compatibility with drilling fluids, can ensure good sulfur removal effect under hot rolling conditions, and is suitable for oil-based drilling fluid engineering; moreover, the involved preparation process is simple, easy to operate and suitable for popularization and application.
Area Code: CN
Application Number: CN202411449703.2
