The polyamine inhibitor is a newly developed high-performance shale inhibitor for water-based drilling fluids, belonging to the modified polyamine category. It features strong cationic adsorption, superior inhibition, and long-lasting effectiveness, with a three-time cuttings recovery improvement rate exceeding 90%. Unlike conventional cationic inhibitors, it overcomes issues such as severe mud flocculation and increased fluid loss.
By incorporating amine compounds into its molecular chain, this product delivers enhanced shale inhibition. Its anti-collapse mechanism differs from ordinary polyether products: its unique structure firmly adsorbs onto clay surfaces, reducing interlayer spacing and preventing water infiltration into formations, thereby stabilizing wellbores. The product can be directly added to various water-based drilling and completion fluids at a typical dosage of 2% or higher.Extensive lab tests and field applications demonstrate that this polyamine inhibitor outperforms international counterparts in inhibition performance while being significantly more cost-effective.
