STUDY ON THIXOTROPIC AGENT OF NEW THIXOTROPIC CEMENT SLURRY

In this paper,a new thixotropic agents system was built,the effect of salinity and high pH on the gelation properties of the thixotropic agents system and the compatibility of thixotropic agents system with cementing additives were studied,the formulation of the thixotropic agents system was obtained by orthogonal tests,and the thixotropy and conventional properties of the new thixotropic cement slurry were evaluated by hysteresis loop method and API standards of cementing slurry.The results showed that,the fluid loss agent had less effect on the properties of thixotropic agents system,the dispersing agent could inhibit the gelatinization of thixotropic agents system,but the gel properties of thixotropic agents system could be improved by adjusting the initiator addition.The new thixotropic cement system has good thixotropic property and flowability,its fluid loss under 75℃ is 81mL,its compressive strength is up to 19.4MPa after cured for 24h,it can meet the needs of cementing quality.