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高性能抗高温聚合物钻井液研究与应用 被引量:10
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作者 刘晓栋 谷卉琳 +1 位作者 马永乐 张勇 《钻井液与完井液》 CAS 北大核心 2018年第1期13-20,共8页
为满足环境敏感性海域高温深井钻井作业和环境保护要求,研究了抗温200℃,生物毒性值LC50大于10×10~4mg/L的高性能抗高温聚合物钻井液,其以合成聚合物为主要处理剂,辅以优选出的纳米封堵剂、页岩抑制剂和极压润滑剂,该体系具有了油... 为满足环境敏感性海域高温深井钻井作业和环境保护要求,研究了抗温200℃,生物毒性值LC50大于10×10~4mg/L的高性能抗高温聚合物钻井液,其以合成聚合物为主要处理剂,辅以优选出的纳米封堵剂、页岩抑制剂和极压润滑剂,该体系具有了油基钻井液抑制泥页岩水化的分散性能和润滑性能,对环境友好,可直接排海。实验表明,分别以重晶石和甲酸盐为加重剂,该抗高温聚合物海水基钻井液体系在200℃高温热稳定时间长达48 h以上,高温高压滤失量为12~25mL,抗20%氯化钠和0.5%氯化钙污染,生物毒性卤虫96 h半致死浓度LC_(50)大于10×10~4 mg/L,发光细菌半数有效浓度EC_(50)大于30×10~4 mg/L,符合一级海区生物毒性排放要求。在环渤海油田进行了现场应用,取得了良好的试验效果,试验最深井深6 066 m,最高井底温度204℃。 展开更多
关键词 高温深井 环境友好 高性能钻井液 抗高温聚合物钻井液 生物毒性 可排放 海上钻井
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Cigarette Smoking Increases Risk for Incident Metabolic Syndrome in Chinese Men—Shanghai Diabetes Study 被引量:13
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作者 ZHU YunXia ZHANG MingLiang +5 位作者 HOU XuHong LU JunXi PENG LiangPu gu huilin WANG Chen JIA WeiPing 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2011年第5期475-482,共8页
Objective To determine whether smoking increases the risk for developing metabolic syndrome (MetS) in Chinese men.Methods A total of 693 men with no MetS at baseline were followed for 2.9‐5.5 years.Subjects were di... Objective To determine whether smoking increases the risk for developing metabolic syndrome (MetS) in Chinese men.Methods A total of 693 men with no MetS at baseline were followed for 2.9‐5.5 years.Subjects were divided into nonsmokers,ex‐smokers,and current smokers according to baseline smoking status.Results After adjusting for age,education level,alcohol intake,fasting plasma insulin,HOMA‐IR index,and BMI at baseline and weight change,current smokers were dose‐dependently associated with increased risk for developing new MetS compared with nonsmokers.The odds ratio (OR) was 2.131 (95% CI,1.264,3.592;P0.01) for the NCEPIII definition or 3.083 (95% CI,1.807,5.295;P0.01) for the JCDCG definition of MetS.Ex‐smokers who had quit for ≥13 years significantly decreased the risk for developing new MetS defined by the JCDCG definition.Compared with nonsmokers,current smokers were significantly associated with increased incidence of hypertriglyceridemia and low HDL‐C.Conclusion Smoking is a risk factor for developing MetS in Chinese men after adjusting for age,education level,alcohol intake,fasting plasma insulin,HOMA‐IR,BMI,and weight change.This could be due to an increased incidence of dyslipidemia.Smoking cessation for 13 years decreased the risk for developing MetS defined by the JCDCG definition. 展开更多
关键词 SMOKING Metabolic syndrome DYSLIPIDEMIA
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