2011•Drilling Fluid & Completion FluidRequires access
Synthesis and Evaluation of Ultra-high temperature Retarder ZH-8 for Oil Well Cement
Yuanzhong Cui
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Abstract
An ultra-high temperature retarder ZH-8 is synthesized by copolymerizing monomers that contain hydroxyl group,carboxyl group and phosphorus.The experimental results indicate that ZH-8 can be used at 110-200℃,and it has linear relation with the thickening time.Moreover,the strength develops quickly at high temperature in 48 hours,and it is compatible with other cement additives,which is good for cementing job.