Summary on Characteristics and Development of High Temperature Oil well Cement Retarder

In this paper,the commonly used oil well cement retarders are summarized,from the aspects of types,characteristics and mechanisms,also the organic and polymer retarders are compared,as well as the research progress of high-temperature retarder is reviewed.Meanwhile,the development trends,problems and recommendations of the retarders are discussed.Moreover,the further research of retarders should be strengthened on large range of temperature difference,no effect on cement strength,linear relationship of content and thickening time,operating easily,and appling to ultra high temperature cementing job.At last,not only new types of organic phosphate and polymers should be studied,but also the compound application of existing retarder or new products should be paid more attention.Especially for the performance limitations due to use alone,that could try to expand the temperature range and improve the overall performance.