石油化工2016，Vol.45Issue(9)：1087-1093,7.DOI:10.3969/j.issn.1000-8144.2016.09.011
无土相油基钻井液用增黏提切剂的合成及性能
Synthesis and properties of a tackifying and shear strength-improving agent for clay-free oil-based drilling fluids
摘要
Abstract
A tackifying and shear strength-improving agent which could be used in clay-free oil-based drilling fluids was synthesized through emulsion polymerization. The effects of monomer ratio, monomer dosage,crosslinking agent dosage,initiator dosage,emulsifier dosage, reaction temperature and time on the performances of the product were investigated. Its structure and particle size were characterized by FTIR,nano particle size analyzer and metallographic electron microscope,and its performances diesel oil and clay-free oil-based drilling fluid were evaluated separately. The optimized synthesis conditions were n(hexadecyl methacrylate)∶n(styrene) of 5∶5,monomer dosage of 30%(w)-35%(w),initiator potassium persulfate dosage of 0.7%(w)-0.9%(w),crosslinking agent divinyl benzene dosage of 0.6%(w)-0.8%(w),temperature of 80-85℃, time of 6-7 h,and composite emulsifier dosage of 5%(w)-6%(w) with m(sodium dodecyl benzene sulfonate)∶m(OP-10) of 1∶1.5. The characterization results showed that the average particle size of the tackifying and shear strength-improving agent was about 96 nm. The experimental results indicated that,when the addition of the tackifying and shear strength-improving agent was more than 3%of diesel oil,the ratio of the yield point to the plastic viscosity was above 0.5 and changed little in the temperature range of 80-160℃;its properties remained stable after continuous aging at 150℃for 72 h. Under the conditions of 149℃and 55.5 MPa,the ratios of the yield points to the plastic viscosities in diesel oil and clay-free oil-based drilling fluid were 0.470 and 0.200,respectively,with good suspension stability.关键词
无土相油基钻井液/增黏剂/提切剂/油分散聚合物Key words
clay-free oil-based drilling fluid/tackifier/shear strength-improving agent/oil-dispersed polymer分类
化学化工引用本文复制引用
李晓岚,孙举,郑志军,杨朝光,郭鹏..无土相油基钻井液用增黏提切剂的合成及性能[J].石油化工,2016,45(9):1087-1093,7.基金项目
中国石化集团公司科技攻关项目（JP14014）。 （）
