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程少勇 《中国石油和化工标准与质量》2018,(3)
社会经济的发展离不开能源的支持,随着社会对能源需求量的增加,油气田开发面临着严峻的挑战。在地层中还有许多原油没有被开采出来,需要借助微生物技术提高油气田开发效率,提高石油产量。微生物技术具有经济性、环保性特点,操作简单,其在油气田开发中的应用具有重要的意义。本文对微生物技术的作用机理进行分析,并就微生物技术在油气田开发中的应用进行探讨。 相似文献
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系统地总结了CuCr触头材料的特性及功能机理,在此基础上分析了基于CuCr触头材料的适用于126kV电压等级的新型触头材料的特性和功能机理。 相似文献
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To improve the limiting current interruption capability and minimizing vacuum interrupter with axial magnetic field (AMF) electrodes, it is significant to investigate the vacuum arc behaviours between the contacts. AMF distributions of the slot type electrodes were studied by both numerical analysis and experiments. Furthermore, the behaviours of vacuum arcs for different parameters of the slot type AMF electrodes were investigated by using high-speed CCD camera. The influences of gap distance, contact diameter and phase shift time between AMF and arc current on the vacuum arc were investigated. The results provide a reference for research and development of vacuum interrupters with slot type or other types of AMF electrode. 相似文献
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The influence of an arc current on the discharge development and the arc modes of a single coil type axial magnetic field (AMF) electrode were investigated by a high-speed charge couple device (CCD) video camera in a long gap distance of 40 mm. The distribution of the axial magnetic field of the single coil type AMF electrode was computed. By computational results, the single coil type AMF electrode could generate higher axial magnetic flux density than the slot type AMF electrode. It was found that the single coil type AMF electrode could perform better than the slot type AMF electrode with the same designing parameters. And the development of the arc modes experienced diffuse mode, constricted but unstable mode, and constricted and stable mode with the amplitude of the arc current increasing. The correlation between the vacuum arc and the noise components of arc voltage was investigated too. The interruption capability could be known in a practical commercial vacuum interrupter by the test results in a demountable vacuum interrupter (DVC) with a electrode diameter of 50 mm and a gap distance of 40 mm.The test results could provide reference to design the high voltage vacuum interrupter adopting the single coil type AMF electrode. 相似文献
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The greenhouse effect of SFe is a great concern today. The development of high voltage vacuum circuit breakers becomes more important. The vacuum circuit breaker has minimum pollution to the environment. The vacuum interrupter is the key part of a vacuum circuit breaker. The interrupting characteristics in vacuum and arc-controlling techniue are the main problems to be solved for a longer gap distance in developing high voltage vacuum interrupters. To understand the vacuum arc characteristics and provide effective technique to control vacuum arc in a long gap distance, the arc mode transition of a cup-type axial magnetic field electrode is observed by a high-speed charge coupled device (CGD) video camera under different gap distances while the arc voltage and arc current are recorded. The controlling ability of the axial magnetic field on vacuum arc obviously decreases when the gap distance is longer than 40 ram. The noise components and mean value of the arc voltage significantly increase. The effective method for controlling the vacuum arc characteristics is provided by long gap distances based on the test results. The test results can be used as a reference to develop high voltage and large capacity vacuum interrupters. 相似文献
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