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第三届教学管理与课程建设学术会议

作者： Lin SUN, Yang SUN, Jinghui ZHANG, Shuangchun YANG, Yi PAN Liaoning Shihua University. Fushun, Liaoning.China 113001

drilling is an important technology for the oil industry. drilling engineering is a compulsory course for petroleum engineering students. The improvement of teaching quality is bound to enhance the professional quality and skills of the graduates of Petroleum engineering. For the problems and contradictions encountered in drilling engineering, this paper proposes a series of teaching reform measures and programs, and does initial attempt in the actual teaching, which receives very good results. With the deepening of teaching, students significantly increases interesting in learning, enhances motivation to learn and upgrades the grasp to drilling knowledge.

关键词： drilling engineering Teaching Reformation Petroleum engineering

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DETERMINATION OF ROCK-BREAKING PERFORMANCE OF HIGH-PRESSURE SUPERCRITICAL CARBON DIOXIDE JET

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Journal of Hydrodynamics 2012年第4期24卷 554-560页

作者： DU Yu-kun WANG Rui-he NI Hong-jian LI Mu-kun SONG Wei-qiang SONG Hui-fang College of Petroleum engineering China University of Petroleum(East China)Qingdao 266580China

In this study, a well-designed experimental setup is used to determine the rock-breaking performance of a high-pressure supercritical carbon dioxide （SC-CO2） jet. Its rock-breaking performance is first compared with that of a high-pressure water jet under the same operation conditions. The effects of five major factors that affect the rock-breaking performance of the high-pressure SC-CO2 jet, i.e., the nozzle diameter, the standoff distance, the jet pressure, the rock compressive strength and the jet temperature are experimentally determined. The experimental results indicate that the rock-breaking performance of the SC-CO2 jet is significantly improved over the high-pressure water jet. It is also found that the rock-breaking performance of the SC-CO2 jet is improved with the increase of the nozzle diameter or the standoff distance, until the nozzle diameter or the standoff distance reaches a certain critical value and after that it begins to deteriorate. The rock-breaking performance of the SC-CO2 jet improves monotonically with the increase of the jet pressure, while it shows a monotonic deterioration with the increase of the rock compressive strength. In addition, it is found that, under the same working conditions, the SC-CO2 jet can always provide a better rock-breaking performance than the subcritical liquid CO2 jet.

关键词： supercritical carbon dioxide drilling engineering rock-breaking performance

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Research on Small Signal Amplification Circuit of Downhole Instrument

Research on Small Signal Amplification Circuit of Downhole I...

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2012 National Conference on Information Technology and Computer Science

作者： Lai Xin School of Electronical Information of Southwest Petroleum university,Cheng du 610500,China Wang Chunpu Chuanqing Geological Exploration& Development Research Institute,Cheng du 610500,China Ge Liang School of Electronical Information of Southwest Petroleum university,Cheng du 610500,China

In order to acquire the real-time work of underground drill,promote the security and the reliability,it is necessary to effectively measure the drilling engineering parameter of drilling pressure,torque and side pressure etc.It uses the resistance strain sensor as a converter.The microvolt signal amplifier circuit is designed through analyzing the output signal of the resistance strain sensor.The design is applied with high-precision and rail-to-rail OP AD8552 as the core chip in the microvolt signal amplifier circuit.Through experimental test,it is obtained with experimental data of amplifier circuit.Moreover,the data are processed and analyzed using MATLAB software.The signal gain of the whole circuit is as high as 80dB,and the circuit has strong anti-interference ability and high temperature resist.The amplification to the signal above 1μV is good,which is satisfied with the parameter test system of drilling engineering.

关键词： Microvolt signal Signal amplifier circuit Resistance strain sensor AD8552 drilling engineering

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