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28th International Conference on Computational and Experimental Engineering and Sciences, ICCES 2022

作者： Guo, Xueli Qi, Fengzhong Yu, Yongjin Jin, Jianzhou Guo, Yuchao Ji, Hongfei Cheng, Yongqin Zhao, Zhengyang CNPC Engineering Technology R&D Company Limited Beijing China Research Institute of Petroleum Exploration and Development Beijing China China University of Petroleum Beijing China

ISBN: (纸本)9783031020964

The temperature is as high as 500 °C at the bottom of shale oil wells during in-situ development. during shale oil production, the fluids with high temperature are transmitted to the wellhead, and the wellbore temperature will rise extremely, which greatly affects the cement sheath integrity. In this paper, the linear expansion coefficient of cement stone under the temperature of 500 ℃ were measured. Based on the experimental data and the field data of shale oil well, the stage finite element modeling method was adopted to establish a casing-cement-formation (CCF) model considering the temperature and pressure coupling. The results revealed that the linear expansion coefficient of cement stone decreases linearly with the increase of temperature. When the temperature was less than 250 ℃, the cement stone expanded. However, when the temperature exceeded 250 ℃, it shrank. The maximum shrinkage ratio can be 25 × 10–6/℃ for the temperature of 500 ℃. The circumferential stress of the inner wall of cement sheath first increased rapidly, then slowly decreased to be stable. The larger the cement stone shrink ratio was, the greater the circumferential stress was. The maximum circumferential stress can exceed 10 MPa for the shrink ratio of 25 × 10–6/℃. It can be concluded that the circumferential stress appears in a tensile state under high temperature conditions, which can easily lead to the failure of the cement sheath seal. The strength of the cement stone should be considered when designing the cement slurry property. In addition to the decay performance, the expansion of the cement stone should also be designed to ensure that the cement stone does not shrink when subjected to high temperature conditions. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Cements

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Polyethylene Oxide-Based Composite Solid Electrolytes for Lithium Batteries:Current Progress,Low-Temperature and High-Voltage Limitations,and Prospects

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Electrochemical Energy reviews 2024年第1期7卷 53-90页

作者： Xin Su Xiao-Pei Xu Zhao-Qi Ji Ji Wu Fei Ma Li-Zhen Fan Advanced Battery Technology Center School of New EnergyHarbin Institute of TechnologyWeihai 264209ShandongChina Advanced Battery Technology Center School of Marine Science and TechnologyHarbin Institute of TechnologyWeihai 264209ShandongChina Advanced Battery Technology Center School of Automotive EngineeringHarbin Institute of TechnologyWeihai 264209ShandongChina R&D Center Shanghai Shanshan Technology Co.Ltd.Shanghai 201209China Department of Chemistry and Biochemistry Georgia Southern UniversityStatesboro GA30460USA Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

Lithium-ion batteries(LIBs)are considered to be one of the most promising power sources for mobile electronic products,portable power devices and vehicles due to their superior environmental friendliness,excellent energy density,negligible memory effect,good charge/discharge rates,stable cycling life,and efficient electrochemical energy conversion,which distinguish it from other power ***,the flammable and volatile organic solvents in carbonate-containing liquid electrolytes can leach,resulting in thermal runaway and interface reactions,thus significantly limiting its *** use of polymer solid electrolytes is an effective way to solve this safety issues,among which poly(ethylene oxide)(PEO)-based solid polymer electrolytes(SPEs)have attracted much attention because of their stable mechanical properties,ease of fabrication,excellent electrochemical and thermal ***,PEO-SPEs with their low room-temperature ionic conductivity,narrow electrochemical windows,poor interface stability,and uncontrollable growth of lithium dendrites cannot meet the demand for high energy density in future ***,this review firstly describes the ion transport mechanisms and challenges that are crucial for PEO-SPEs,and then provides a comprehensive review of current approaches to address the challenges,including novel and efficient lithium salts,additives,composite electrolytes,stable solid electrolyte interfaces,3-d lithium metals and alloys,cathode protection layers and multi-layer ***,future research directions are proposed for the stable operation of PEO-SPEs at room temperature and high voltage,which is imperative for the commercialization of safe and high energy density LIBs.

关键词： Solid polymer electrolytes Polyethylene oxide Ionic conductivity Electrochemical window Lithium-ions batteries Additives

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WIME Systematic Innovation Method based on 6WHI and Total Factor Matrix Analysis

WIME Systematic Innovation Method based on 6WHI and Total Fa...

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2023 International Conference on Electronic, Electrical and Information technology, EEIT 2023

作者： Li, Xianing Hou, Bing Zhang, Jiqun Xiao, Yanling Liu, Lian Mi, Lan China University of Petroleum Beijing102249 China Research Institute of Petroleum Exploration & Development Beijing100083 China Artificial Intelligence Technology R&D Center for Exploration and Development CNPC Beijing100083 China Northeast Petroleum University Daqing163318 China

The involved object of systematic innovation and management is neither a single goal nor a single meth-od. Firstly, the research object is a systematic and organic whole composed of multiple node elements with a certain degree of correlation. Secondly, the research method is multi-dimensional, comprehensive, all round and highly efficient. Innovation should break through the existing thinking framework, change the existing structure, add new components, give new energy and produce new functions. The 5W1H is a questioning approach and a problem-solving method that answers all the basic elements within a problem which are what, who, when, where, why, and how. It aims to view ideas from various perspectives and gain an in-depth understanding of a specific situation. On the basis of 5W1H analysis method, this paper puts forward the 6WHI systematic innovation management method, which increases the query words weather and if of the innovation expansion solution, increases the number of questions from 6 to 8, and expands innovative forward-looking and innovative solutions diversity, with smoother pronunciation, more exciting storm. Furthermore, a systematic innovation method based on 6WHI and total factor analysis is established, and a more general and normative model WIME method is presented. This method can be utilized as a continuous process-improvement technique in an organization. Taking the 17 letters of "if question patents"as the prefix, they are just 17 common key elements in system management and innovation. For each element mentioned above, 8 questions and answers of 6WHI are given to realize systematic management and innovation. The above two types of work are arranged according to the matrix format, and then the weighted evaluation method is introduced to evaluate the above management and innovation work, so as to give a general and standardized systematic management and innovation (WIME) method. © Published under licence by IOP Publishing Ltd.

关键词： Factor analysis

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Trend Analysis for Calibrated Active System Volume and differential Flow Significantly reduces False Positive Kick Alarm during drilling

Trend Analysis for Calibrated Active System Volume and Diffe...

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2024 SPE Asia Pacific Oil and Gas Conference and Exhibition, APOGCE 2024

作者： ding, danhong Mei, Yunyi Ge, Su Yong, Fengwei Lu, Yaozhong Ge, Yunhua CNPC National Elite Institute of Engineering Beijing China CNPC Engineering Technology R&D Company limited Beijing China CNPC Research Institute of Petroleum Exploration and Development Beijing China Sino Science & Technology Company Limited Israel

ISBN: (纸本)9781959025269

rapid kick detection is an essential part of rig safety. Identifying potential kick events in time is valuable and is an urgent and critical task for rig personnel and remote Operation Support Center(OSC) users. A new monitoring system has been developed by firstly calibrating the active system volume for pipe and cuttings displacement during drilling and then by detecting a statistically significant trend in the observed data rather than to rely solely on absolute values and threshold crossing to maximize the sensitivity whilst minimizing the number of false alarms. More than hundreds of historical kick alarms were reviewed and the corresponding mud logging data before the events occurred were displayed in log format against time for clear identification of anomalies in three different tracks: one track for pit volume, one for flow-in and flow-out, the third hole depth, bit depth and block position. By applying an automated rule-based system, the states of rig activities are also displayed simultaneously by detection of bit movement, pump, rotation status and other elements. It is noticed that the data absolute value, data noise, and rig operations such as sudden string movements and flow transients has significant interference to the detection of kick event and that the differential flow is more sensitive early kick indicator than pit volume in most of the historical cases. A pit volume calibrated for drill pipe and cuttings displacement during drilling and a trend analysis by applying Page-Hinkley method for monitoring both active system volumes and differential flows are established and the monitoring system is updated. The system has been tested and refined with the data flows of the historical cases in labs to maximize the sensitivity whilst minimizing the number of false alarms. A significant reduction of false positive alarms is achieved by reducing triggering of 1-2 alarms per well per week while maintaining a 100% true positive identification rate by compa

关键词： drill pipe

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High-entropy alloy catalysts:From bulk to nano toward highly efficient carbon and nitrogen catalysis

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Carbon Energy 2022年第5期4卷 731-761页

作者： Lanlan Yu Kaizhu Zeng Chenghang Li Xiaorong Lin Hanwen Liu Wenhui Shi Hua-Jun Qiu Yifei Yuan Yonggang Yao State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina College of Chemistry and Materials Engineering Wenzhou UniversityWenzhouZhejiangChina Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)ShenzhenGuangdongChina

High-entropy alloys(HEAs)have attracted widespread attention as both structural and functional materials owing to their huge multielement composition space and unique high-entropy mixing ***,emerging HEAs,either in nano or highly porous bulk forms,are developed and utilized for various catalytic and clean energy applications with superior activity and remarkable *** catalysts,HEAs possess some unique advantages,including(1)a multielement composition space for the discovery of new catalysts and fine-tuning of surface adsorption(i.e.,activity and selectivity),(2)diverse active sites derived from the random multielement mixing that are especially suitable for multistep catalysis,and(3)a high-entropy stabilized structure that improves the structural durability in harsh catalytic *** from these inherent advantages,HEA catalysts have demonstrated superior catalytic performances and are promising for complex carbon(C)and nitrogen(N)cycle reactions featuring multistep reaction pathways and many different ***,the design,synthesis,characterization,and understanding of HEA catalysts for C-and N-involved reactions are extremely challenging because of both complex high-entropy materials and complex *** this review,we present the recent development of HEA catalysts,particularly on their innovative and extensive syntheses,advanced(in situ)characterizations,and applications in complex C and N looping reactions,aiming to provide a focused view on how to utilize intrinsically complex catalysts for these important and complex *** the end,remaining challenges and future directions are proposed to guide the development and application of HEA catalysts for highly efficient energy storage and chemical conversion toward carbon neutrality.

关键词： carbon conversion electrocatalysis high-entropy alloy catalysts multifunctionality nitrogen conversion

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Analysis of light load efficiency of V2x dAB converter for EVs based on cascode GaN FET

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Transactions of the Korean Institute of Electrical Engineers 2022年第11期71卷 1631-1638页

作者： Kwak, Bongwoo Kim, Jonghoon Dept. of Electrical Engineering Chungnam National University Korea Republic of Depy. of Automotive Materials & Components R&D Group Korea Institute of Industrial Technology Korea Republic of

In this paper, the light-load efficiency of cascode gallium nitride (GaN) FET-based V2x dual active bridge (dAB) converters for electric vehicles(EVs) is analyzed. High efficiency and high power density are required when an on-board charger(OBC) is used in EVs. To this and a zero voltage switching (ZVS) topology, such as that observed in dAB converters, is widely applied. As for the converter requiring current enough to achieve the ZVS condition of the efficiency characteristics vary depending on whether ZVS operated or not. Therefore, in this study, the efficiency in the hard switching section is improved by applying a cascode GaN FET to a dAB converter. The ZVS characteristic is analyzed by considering the parasitic output capacitance of the switching device. Compared to the Si device, the cascode GaN FET with low parasitic output capacitance realizes ZVS under a lower load condition. To verify this, a load test is performed by applying it to a 3-kW dAB converter. The experimental results confirm that ZVS is achieved when the cascode GaN FET is applied. Moreover, a shorter dead time can be applied owing to excellent dv/dt and di/dt characteristics, which improves the overall efficiency. In conclusion, the use of GaN FET in dAB converters can improve efficiency at light loads. Copyright © The Korean Institute of Electrical Engineers.

关键词： Zero voltage switching

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All-cellulose triboelectric textile with complete biodegradability for eco-friendly smart wearable electronics

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Nano research Energy 2025年第1期4卷 21-31页

作者： Qiru Lian Jiaxin Li Ting Li Qiuyu Li Yifang Liang Hanguang Wu rui Wang Beijing Key Laboratory of Clothing Materials R&D and Assessment Beijing Institute of Fashion TechnologyBeijing 100029China

The booming of the triboelectric textiles(TENG-Ts)in recent years is accompanied with the e-waste crisis and a huge hidden danger to the natural environment,thus it is highly desired to create the eco-friendly TENG-Ts with degradability for the sustainable development of the smart *** this study,we fabricated a regenerated cellulose-based TENG-T(rC TENG-T)with complete biodegradability through braiding and knitting technology,in which two friction layers were chemically modified by using two silane hydrolysates with opposite *** energy harvesting ability of the rC TENG-T was significantly improved,and the open-circuit voltages(VOC)and short-circuit current(ISC)were enhanced to nearly 9.8 V and 160 nA *** rC TENG-T can be completely bio-degraded under the function of cellulase after 72 h,endowing it with wide application potential as eco-friendly smart wearable devices including microelectronics power source and self-powered sensor with capability of monitoring human physical conditions and the external pressure.

关键词： triboelectric nanogenerator smart textile cellulose biodegradability self-powered

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Influence of the design of Ti (C, N)-based cermets with alternative binders on their performance and wear in milling

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Wear 2025年 570卷

作者： Premkumar, Vikas B.K. Chalkiadakis, Evangelos M'Saoubi, rachid Bushlya, Volodymyr Production and Materials Engineering Lund University Ole Römers Väg 1F Box 118 Lund221 00 Sweden R&D Materials and Technology Development Seco Tools AB FagerstaSE-73782 Sweden

Ti (C, N) based cermet materials are predominantly used in continuous finishing applications of metal cutting due to their high hardness, excellent resistance to oxidation and high chemical stability. However, their application in interrupted cutting like milling are limited due to their brittle-like failure due to low fracture toughness. In this work, alternative binder systems such as Co-Ni and Ni are investigated to study their influence on the material properties followed by evaluating their performance in face milling of quench and tempered 42CrMo4 steels having a hardness of 35 HrC. The results show that as the concentration of Ni in the binder increases, the hardness (HV) decreases and the Palmqvist fracture toughness (K1C) increases. This trend is more pronounced in the binder containing pure Ni. Thus, Ni helps in transforming the nature of a brittle-like cermet with Co binder to a tougher cermet with Co-Ni and pure Ni binder. Up-milling tests with coolant revealed that as-sintered cermet with pure Co and Co-Ni binder performed similarly while pure Ni binder showed premature failure. CVd coated cermet in as-deposited state shows a substantial improvement in performance of the Co-Ni binder compared to pure Co binder while Ni binder show rapid flaking of coating causing premature failure. Formation of comb cracks and parallel cracks networks followed by adhesion and impaction of steel in the cracks is observed as the main wear mechanism that causes rapid block isolation of the geometry leading to tool catastrophic failure. However, CVd coated Co-Ni binder system showed less adhesion in the crack networks which is speculated to be the reason for its improved performance. © 2025 The Authors

关键词： Cracks

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Enhanced bifunctional catalytic activities of N-doped graphene by Ni in a 3d trimodal nanoporous nanotubular network and its ultralong cycling performance in Zn-air batteries

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Journal of Energy Chemistry 2022年第3期31卷 466-473,I0013页

作者： Yanyi Zhang Xiang-Peng Kong Xiaorong Lin Kailong Hu Weiwei Zhao Guoqiang Xie Xi Lin Xingjun Liu Yoshikazu Ito Hua-Jun Qiu School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055GuangdongChina Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials Shenzhen 518055GuangdongChina State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Blockchain Development and Research Institute Harbin Institute of TechnologyShenzhen 518055GuangdongChina Institute of Applied Physics Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukuba 305-8573Japan

Free-standing and fexible air electrodes with long-lasting bifunctional activities for both the oxygen reduction reaction(Orr)and the oxygen evolution reaction(OEr)are crucial to the development of wearable Zn-air rechargeable *** this work,we synthesize a fexible air electrode consisting of 3d nanoporous N-doped graphene with trimodal shells and Ni particles through repeated chemical vapor deposition(CVd)and acidic etching *** results indicate that such trimodal graphene morphology significantly enhances the active N-dopant sites and graphene-coated Ni surface,which consequentially boosts both the Orr and OEr activities,as well as catalytic ***-principles density functional theory(dFT)calculations reveal the synergetic effects between the Ni and the N-doped graphene;namely,the Ni nanoparticles boost the bifunctional activities of the coated N-doped graphene,and in turn the graphene-covering layers enhance the stability of *** to the better protection from the triple graphene shells,our trimodal N-doped graphene/Ni-based Zn-air battery can be stably discharged/recharged beyond 2500 h with low *** is reasonable to expect that such freestanding trimodal graphene/Ni would be promising in many fexible energy conversion/storage devices.

关键词： Triple shells Bifunctional Hierarchical Cycling durability Orr/OEr

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development of High Temperature resistant Soft Metal Sealing Components in downhole Tools

Development of High Temperature Resistant Soft Metal Sealing...

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2024 International Petroleum technology Conference, IPTC 2024

作者： Guo, Huijuan Li, Jianghao Song, Xiping Guodong, david Zhan Wang, Baodong Drilling Mechanical Department CNPC Engineering Technology R&D Company Limited China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing China Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia

ISBN: (纸本)9781959025184

The sealing components plays the role of sealing and pressure resistance of downhole tools, which is a key component that determines the safe and reliable operation of downhole tools. With the development of oil and gas exploitation towards deep and ultra-deep wells, the performance requirements of sealing components for downhole tools are gradually improved. rubber materials are prone to aging and deterioration in downhole high temperature and corrosive environment, resulting in sealing failure and difficulty in maintaining good sealing for a long time. Soft metal materials have the characteristics of high temperature resistance, high sealing pressure and corrosion resistance. The application of high temperature resistant soft metal materials in petroleum engineering sealing components can better solve the problem of aging failure of rubber sealing components, which is of great significance for ensuring the safety of downhole sealing. Based on the introduction of the application of soft metal materials in petroleum engineering, this paper studies the refining method of copper-based soft metal materials, and determines the formula of soft metal materials with excellent performance by analyzing the microstructure of soft metal materials. Based on the developed soft metal material, the high temperature tensile mechanical properties test, high temperature elastic modulus test were carried out. The feasibility of using copper-based soft metal as sealing element in petroleum engineering was analyzed, and the soft metal sealing element for expansion pipe sealing was designed. The research results show that: (1) Metal material seals have been widely studied at home and abroad, and some products have been maturely applied in the market, with good mechanical properties and sealing performance. (2) By adding Ga, rh, Si and other alloying elements to copper metal, the metal wettability, temperature resistance and elastic properties of the material can be improved, and the seal

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