1results about How to "Improve coagulation performance" patented technology

This invention provides a polymer, an ultra-high temperature oil well cement retarder, its preparation method and application, and a cement slurry. The molecular structure of the polymer is shown in formula (1): In formula (1), a, b, and c are all molar numbers, and the ratio of the three is 40-85:10-40:5-20; R1 is one of -H, -CH3, and -CH2COOH; R2 is selected from one of the following compounds: The ultra-high temperature oil well cement retarder provided by this invention can withstand temperatures up to 240℃. In the temperature range of 110-240℃, the cement slurry thickening time is linearly adjustable within 200-500 min and has a good linear relationship with temperature and dosage. It has good compatibility with other admixtures, has little impact on the mechanical properties of cement stone, and can ensure the safety of ultra-high temperature cementing operations and meet the cementing technical requirements of complex and difficult wells.