568 results about "Reaction inhibitor" patented technology

The invention relates to a polyamine inhibitor for drilling fluids and a method for preparing the polyamine inhibitor. The method comprises the steps as follows: an initiator and an acid-binding agent are placed in a reactor, under the normal pressure and the nitrogen protection, a sulfonylation agent is dripped into the reactor to conduct the sulfonylation reaction, the sulfonylation reaction is 10 to 12 hours, the sulfonylation temperature is 0 to 30 DEG C, reactants are filtered, filtrate is dissolved in the water, the lower-layer fluid is taken down after static split phase of the filtrate, water is removed through reduced pressure distillation, and end sulfo-group esters are obtained; the end sulfo-group esters are dripped into a reaction kettle filled with aminating agents and precipitating agents to conduct the amination, the reaction time is 2 to 3 hours, the amination temperature is 70 to 90 DEG C, products are filtered, solvents are removed through reduced pressure distillation, and the polyamine inhibitor is obtained; and the additive is suitable for various water-based drilling fluids, can control hydration and dispersion of clay shale well, effectively solves the problems that the drilling fluid is thickened and degraded in performance since the clay shale is hydrated and dispersed, and provides a certain guarantee for safely and efficiently drilling.