钻井液与完井液2024，Vol.41Issue(2)：215-219,5.DOI:10.12358/j.issn.1001-5620.2024.02.011
环氧磷酸缓凝剂研发及抗220℃常规密度水泥浆综合性能
Development of An Epoxy Phosphate Retarder and A High Temperature Cement Slurry Resistant to 220 ℃
摘要
Abstract
In designing the molecular structures of cement slurry retarders,monomers with the target groups are selected to produce retarders which can control the thickening time of oil well cement slurries at stable values at temperatures above 200℃.The molecular structure is designed on the basis of functional structure of the polymers.A high temperature penta-polymer retarder NPAAS-1 is developed based on the molecular structure design clue with five monomers,which are AMPS,SAS,NVP,AM and epoxypropyl phosphate.Characterization of the molecular structure of NPAAS-1 shows that the final product is the expected product.Weight loss on heating of NPAAS-1 at 300℃ is only 22.30%.NPASS-1 has good retarding capacity at temperatures above 200℃,and the thickening time of the cement slurry is in a linear relationship with the concentration of NPSSA-1.A cement slurry of moderate density working normally at 220℃ was formulated with NPAAS-1 as the retarder,HTFLA-A as the filter loss reducer,HTDA-6 as the dispersant and HTSA-2 as the suspending agent.At concentration of 3.5%NPAAS-1,the thickening time of the cement slurry is 297 min;while at concentration of 4.5%,the thickening time becomes 530 min.Using this retarder NPAAS-1,the hydration speed of cement can be effectively controlled at ultra-high temperatures.关键词
水泥浆/缓凝剂/缓凝机理/热引发聚合/超高温Key words
Cement slurry/Retarder/Retarding mechanisms/Thermally induced polymerization/Ultra-high temperature分类
能源科技引用本文复制引用
林鑫,刘硕琼,夏修建,孟仁洲..环氧磷酸缓凝剂研发及抗220℃常规密度水泥浆综合性能[J].钻井液与完井液,2024,41(2):215-219,5.基金项目
中石油科技核心项目"抗温240℃以上的环保井筒工作液新材料"(2020A-3913). （2020A-3913）
