To prevent hydrogen-induced loss and achieve long-term effective parameters monitoring in harsh downhole environment,we proposed a Fabry-Perot sensor with vacuum sputter deposited carbon coating film,in which we emplo...To prevent hydrogen-induced loss and achieve long-term effective parameters monitoring in harsh downhole environment,we proposed a Fabry-Perot sensor with vacuum sputter deposited carbon coating film,in which we employed a deposition technology with a higher particle kinetic energy,closer substrate adhesion,and denser films,to deposit the coating film on the surface of the quartz capillary glass tube to protect the sensor from corrosion.The sensitivity and accuracy of the Fabry-Perot sensor with carbon film deposition can reach 369 nm/MPa and 0.02%FS,respectively.Meanwhile,the sensor has less hysteresis error and good pressure linearity of more than 0.99999 for repeatable pressure measurement.The downhole practice monitoring data indicated that this fiber-optic sensor exhibited excellent performance and the sputter deposited carbon coating can effectively decrease hydrogen loss.展开更多
以熔融法制备的R2O-CaO-SiO2-Al2O3-F(RCSAF)系微晶玻璃为研究对象,利用热重分析、X射线衍射等手段分析微晶玻璃的形核和晶体生长动力学。借助Gaussian拟合,获得了微晶玻璃的形核和晶体生长动力学函数。并绘制了非等温加热条件下R2O-CaO...以熔融法制备的R2O-CaO-SiO2-Al2O3-F(RCSAF)系微晶玻璃为研究对象,利用热重分析、X射线衍射等手段分析微晶玻璃的形核和晶体生长动力学。借助Gaussian拟合,获得了微晶玻璃的形核和晶体生长动力学函数。并绘制了非等温加热条件下R2O-CaO-SiO2-Al2O3-F系微晶玻璃的温度–时间–转变(T–T–T)曲线,获得了微晶玻璃形核和晶体生长动力学Gaussian拟合函数关系模型。通过无模式函数模型计算得知微晶玻璃的析晶活化能Ea=357.74 k J/mol,析晶指数n=3.13,微晶玻璃以整体析晶的方式析出晶体。确立了时间、温度和析出晶相对R2O-CaO-SiO2-Al2O3-F系微晶玻璃析晶率曲线的影响规律。微晶玻璃析出的CaF2晶体颗粒均匀弥散的分布于硅碱钙石和α-硅碱钙石中,扫描电子显微镜照片呈现的典型晶体结构进一步验证了RCSAF系微晶玻璃的晶体析出过程。展开更多
基金by the National Natural Science Foundation of China(No.61605101)the Natural Fund of Shandong Province(Nos.ZR2021MF127 and ZR2020LLZ010)the Peixin Fund of Qilu University of Technology(No.2022PX074)。
文摘To prevent hydrogen-induced loss and achieve long-term effective parameters monitoring in harsh downhole environment,we proposed a Fabry-Perot sensor with vacuum sputter deposited carbon coating film,in which we employed a deposition technology with a higher particle kinetic energy,closer substrate adhesion,and denser films,to deposit the coating film on the surface of the quartz capillary glass tube to protect the sensor from corrosion.The sensitivity and accuracy of the Fabry-Perot sensor with carbon film deposition can reach 369 nm/MPa and 0.02%FS,respectively.Meanwhile,the sensor has less hysteresis error and good pressure linearity of more than 0.99999 for repeatable pressure measurement.The downhole practice monitoring data indicated that this fiber-optic sensor exhibited excellent performance and the sputter deposited carbon coating can effectively decrease hydrogen loss.
文摘以熔融法制备的R2O-CaO-SiO2-Al2O3-F(RCSAF)系微晶玻璃为研究对象,利用热重分析、X射线衍射等手段分析微晶玻璃的形核和晶体生长动力学。借助Gaussian拟合,获得了微晶玻璃的形核和晶体生长动力学函数。并绘制了非等温加热条件下R2O-CaO-SiO2-Al2O3-F系微晶玻璃的温度–时间–转变(T–T–T)曲线,获得了微晶玻璃形核和晶体生长动力学Gaussian拟合函数关系模型。通过无模式函数模型计算得知微晶玻璃的析晶活化能Ea=357.74 k J/mol,析晶指数n=3.13,微晶玻璃以整体析晶的方式析出晶体。确立了时间、温度和析出晶相对R2O-CaO-SiO2-Al2O3-F系微晶玻璃析晶率曲线的影响规律。微晶玻璃析出的CaF2晶体颗粒均匀弥散的分布于硅碱钙石和α-硅碱钙石中,扫描电子显微镜照片呈现的典型晶体结构进一步验证了RCSAF系微晶玻璃的晶体析出过程。
