【摘要】 研究了水基钻井液降粘剂磺化苯乙烯-衣康酸共聚物的合成方法。以DMF(N,N-二甲基甲酰胺)为溶剂,苯乙烯、衣康酸摩尔比1.0∶1.2,引发剂BPO(过氧化苯甲酰)用量0.6%,溶液共聚温度85℃、时间4h,得到苯乙烯-衣康酸共聚物,化学结构由红外光谱表征。该共聚物与过量20%发烟硫酸在50℃进行磺化反应2h,生成降粘剂。常温下加入0.3%SSHIA(磺化苯乙烯-衣康酸共聚物)使淡水钻井液的表观粘度由107mPa.s降至48mPa.s以下;加入0.3%SSHIA使淡水钻井液在260℃老化16h后,表观粘度由59mPa.s降至32mPa.s以下,表明该剂具有良好的耐温性。更多还原

【Abstract】 The laboratory synthesis of SSHIA copolymer was presented.Styrene and itaconic acid in molar ratio of 1.0:1.2 were reacted in solution of DMF at the presence of 0.6% BPO at 85℃ for 4 h to form a SSHIA copolymer,the chemical composition was identified by its IR-spectrum.The copolymer and 20 percent of t concentrated sulphuric acid react at 50℃ for 2 hrs to produce a sulfonated styrene/itaconic acid copolymer-viscosity reducer for water base drilling fluids SSHIA.The later with good heat resistance by introducing SSHIA at dosage of 0.3% increases apparent viscosity AP from 107 to <48 mPa·s for an experimental fresh water fluid of 0.3%-from 59 to <32 mPa·s for this fluid after ageing at 260℃ over 16 h.更多还原