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

作者： Xia, Xiujian Yu, Yongjin Qi, Fengzhong Liu, Huiting Qu, Congfeng CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center for Oil and Gas Drilling and Completion Technology Beijing China

ISBN: (纸本)9781959025269

With the continuous deepening of oil and gas exploration and development, the number of ultra-deep and ultra-high temperature wells is gradually increasing in China. The key materials and systems of cementing slurry are crucial for ensuring the safe construction of wells, effective sealing of cement sheath, and safe production of oil and gas. However, the complex working conditions such as ultra-high temperature pose serious challenges to the materials and systems of cement slurry. Focusing on the technical difficulties of ultra-high temperature cement slurry for deep and ultra-deep wells cementing, the cementing retarder, fluid loss additive, stabilizer, and set cement strength retrogression inhibitor with the temperature resistance of 240 ° C were developed through the technical methods, such as optimizing polymer molecular structure, surface modification of powder materials, and synergistic effects between materials. The novel cement slurry system with the temperature resistance of 240 ° C was formed on basis of the above-mentioned four key additives and their supporting materials. Its comprehensive performance was evaluated. The cement slurry system has the resistance to bottom hole circulating temperature of 240 ° C. After curing at 240 ° C, the settling stability of cement slurry can be controlled within 0.05 g/cm3, the API fluid loss is less than 50 mL, and its thickening time can be adjusted arbitrarily within 200 to 600 min, which is linearly related to the test temperature and retarder dosage. The compressive strength of set cement is 45.8 MPa and 55.2 MPa cured at 240 ° C for 2 d and 28 d, respectively. The comprehensive performance of the cement slurry system is excellent, solving a series of problems such as slurry instability, non-adjustable thickening time, uncontrollable water loss, cement stone cracking, and strength decline under ultra-high temperatures. It can meet the requirements of the ultra-high temperature cementing operations and long-term s

关键词： Cement additives

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Study on the Application of Gas-assisted Injection Molding in Polyether ether ketone (PEEK)

Study on the Application of Gas-assisted Injection Molding i...

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SPE Annual Technical Conference and Exhibition, ANTEC 2024

作者： Chen, Shia-Chung Shen, En-Nien Liu, Yan-Jun Feng, Ching-Te Department of Mechanical Engineering Chung Yuan Christian University Taoyuan32023 Taiwan R&D Center for Smart Manufacturing Chung Yuan Christian University Taoyuan32023 Taiwan R&D Center for Semiconductor Carrier Chung Yuan Christian University Taoyuan32023 Taiwan

ISBN: (纸本)9798331308193

due to the world's concern for ESG (Environmental, Social, and Governance) and regulations on carbon emission reduction, the plastic industry faces the challenge of producing plastic parts with less weight, more energy efficiency, while maintaining the same quality performance. Among various injection molding options, gas-assisted injection molding (GAIM) has the potential to meet the mentioned goals of part weight reduction and energy savings. Whether GAIM can be applied to high-performance engineering plastics such as Polyether ether ketone (PEEK) with strength maintenance is worthy of investigation. PEEK is currently one of the important materials used for wafer carriers and reticles. The feasibility evaluation of GAIM for wafer carriers and mask housing production becomes a significant concern for the semiconductor industry. In this study, GAIM was employed for testing L-shaped specimens under various processing conditions, including the percentage of melt filling, delay time, gas pressure, as well as melt temperature, mold temperature, and injection speed. Gas penetration and hollowed core ratio were examined first. Then the associated weight reduction and mechanical strengths were measured and compared to conventional injection-molded (CIM) parts. It was found that the hollowed core ratios within the gas channel range from about 30% to 38% near the gas entry location. The core ratios decrease to about 23% to 29% near the end side of gas penetration. The GAIM angle-shaped part with a 1.8 mm thickness and hollowed core gas channel in the corner can reduce weight by 15%, meanwhile retaining the same strength compared to 2 mm thick CIM parts without a corner channel. For gas-assisted injection-molded reticle housing, the part thickness reduces from 3 mm to 1.7 mm with a 30% weight reduction, flatness improves by 46%, whereas the strength remains the same. © 2024 Society of Plastics Engineers. All rights reserved.

关键词： Plastics industry

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Sensorless Control of Synchronous reluctance Machines Based on Improved Kalman Filter-Phase Locked Loop 26

Sensorless Control of Synchronous Reluctance Machines Based ...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Huang, Jian Ma, Zhixun Tongji University College of Transportation Engineering China Tongji University National Maglev Transportation Engineering R&d Center China

ISBN: (纸本)9798350317589

An improved Kalman filter-phase locked loop (KF-PLL) is proposed to be implemented in sensorless control of a synchronous reluctance machine (SynrM) in the full speed range. By applying the fixed gain vector in the updating the gain matrix of the KF method, the computation of the proposed KF-PLL is greatly reduced which only require two equations with multiplications and additions. The better dynamic performance and estimated accuracy can be achieved with the KF-PLL that is proved by the experimental results. © 2023 IEEE.

关键词： Phase locked loops

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In Situ Electrical Characterization of Carbon Nanotubes in O2 and N2 Plasma to Explain their Field Emission Instability

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ACS Applied Nano Materials 2024年第13期7卷 15648-15654页

作者： Kuo, Yen-Hung Fang, Jen-Kuang Chen, Jen-Chun Shih, Pai-Sheng Chen, Ping-Chun Yang, Yung-Kai Tsai, Hsin-Jung Hsu, Wen-Kuang Department of Materials Science and Engineering National Tsing-Hua University Hsinchu30013 Taiwan Corporate R&D Center Advanced Semiconductor Engineering Inc. No. 26 Jing 3rd Road Nanzih District Kaohsiung811641 Taiwan

due to oxygenation, carbon nanotubes cannot operate field emission for a long period of time. So far, the emission-induced oxygenation mechanism has not been studied in detail;particularly, the underlying mechanism that causes a drastic increase of the emitting current contiguous to the turn-on voltage remains unclear. Cold plasma is a nonthermal equilibrium process and can also oxygenate carbon materials through radiolysis. In this work, electrical measurements of single-walled carbon nanotubes are in situ carried out in O2 and N2 plasma irradiation, and the tube resistance due to irradiative damages is found to increase in three steps, defined as regions I, II, and III. In region I, the increase is rapid and involves extraction of intercalated O2 between the nanotubes. The nanotubes become severely oxygenated in region II, thus enhancing the on-tube scattering and resistance. Nanotube segmentation takes place in region III, where the opened edges are likely bonded with oxygenated and nitride groups. Experimental data successfully explain the field emission instability of carbon nanotubes, including a low life cycle, sudden increase in emitting current around the turn-on voltage, and thermal decomposition of carbon lattices. © 2024 The Authors. Published by American Chemical Society.

关键词： Single-walled carbon nanotubes (SWCN)

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Investigation into IgG/IgE binding capacity and gut microbiota of digestion products derived from glycated ovalbumin

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Food Science and Human Wellness 2024年第6期13卷 3633-3641页

作者： Jihua Mao Yanhong Shao Hui Wang Jun Liu Zongcai Tu National R&D Center for Freshwater Fish Processing College of Life ScienceCollege of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China State Key Laboratory of Food Science and Technology Nanchang UniversityNanchang 330047China

Gut microbiota plays an important role in food *** immunoglobulin G(IgG)/immunoglobulin E(IgE)binding capacity and human gut microbiota changes of digestion products derived from glycated ovalbumin(OVA)were *** digestion effectively destroyed the primary structure of glycated OVA,resulting in a significantly higher digestibility than gastric digestion,and more abundant peptides<3 ***,gastric and gastrointestinal digestion products have different fluorescence quenching and red shift of fluorescence peaks,and possess different conformational *** changes resulted in a decrease in 28.7%of the IgE binding capacity of gastrointestinal digestion products beyond that of ***,gastrointestinal digestion products of glycated OVA increased significantly the proportion of Subdoligranulum,Collinsella,and ***,gastrointestinal digestion products of glycated OVA altered human intestinal microbiota,reducing the risk of potential allergy.

关键词： Ovalbumin Glycation digestion IgG/IgE binding capacity Gut microbiota

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A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis

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International Journal of Smart and Nano Materials 2024年第1期15卷 42-61页

作者： Jianliang Jiang Junxue Zhai Yanqing Chen dongqi Zhao Yakai Feng School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and Chemical Engineering(Tianjin)Tianjin UniversityTianjinChina R&D Department of China(Yangzhou) Material Handling Tech-Engineering LtdYangzhouChina Key Laboratory of Rubber Plastics of Ministry of Education/Shandong Province (QUsT)School of Polymer Science&EngineeringQingdao University of Science&TechnologyQingdaoChina R&D Department of Tianjin Joaboa Technology Co.Ltd TianjinP.R.China Frontiers Science Center for Synthetic Biology Tianjin UniversityTianjinChina Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjinChina

For sustainable application of chloroprene rubber(Cr),a new technology is developed by the vulcanization of Cr using 2,2'-dithiodipyridine(dPd)as a cross-linking agent with the repro-cessing performance owing to disulfde *** dPd was incorporated into Cr vulcanization,the Menschutkin reac-tion between allyl chloride group and pyridine group occurred with a maximum exothermic peak at 184°*** number of effective cross-linking bond at o.5 phr dPd vulcanizate was higher than that at high dPd *** vulcanizate showed high tensile strength(11.12 MPa)and elongation at break(1253±120%)owing to the exchangeable disulfide bond in the *** the catalysis of triphenylphosphine,the metathesis of disulfide compound was improved obviously,which endowed Cr/dPd vulcanizates with good recyclability *** cross-linkage maintains its stability at low temperature,thus ensuring the mechanical stability of Cr/dPd vulcanizate under the ambient *** and reprocessing of Cr/dPd vulcanizate can be conducted with common industrial rubber processing *** reprocessable chloroprene rubber could have potential appli-cation in Cr industry,also serve to significantly improve envir-onmental sustainability.

关键词： Chloroprene rubber reprocessable Menschutkin reaction disulfide

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Chiral inorganic nanomaterials:Harnessing chirality-dependent interactions with living entities for biomedical applications

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Nano research 2023年第8期16卷 11107-11124页

作者： Qi Gao Lili Tan Zhihao Wen daidi Fan Junfeng Hui Peng-peng Wang Shaanxi Key Laboratory of Degradable Biomedical Materials Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi’an 710069China State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China

Chirality is an intriguing and fundamental property of natural matter,which is especially crucial in supporting the processes of living *** selective interactions between natural chiral compounds are widespread at all levels in living entities and play a vital role in biochemical *** cutting-edge advancements in synthetic chiral inorganic nanostructures have led to significant progress in their applications within biological *** developments have unraveled chirality-dependent interactions at the nanoscale and molecular scale,providing a better understanding of intricate process of chiral selection in biological systems and demonstrating the potential of chiral inorganic nanostructures for life science ***,we summarize recent progress in understanding the chirality origin of inorganic chiral nanoparticles and the development of wet-chemical *** also discuss the captivating interaction between chiral inorganic nanostructures and biological entities at various ***,we discuss the challenges and potential of functional chiral nanomaterials for future biomedical and bioengineering applications,offering design ideas and a forecast for their future impact.

关键词： chiral inorganic nanomaterials living system chirality-dependent interaction bioengineering application

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Basic Study on Cybernic Interface for Amyotrophic Lateral Sclerosis Patients to Perform daily Living Tasks by Transiting Seamlessly Between Cyberspace and Physical Space

Basic Study on Cybernic Interface for Amyotrophic Lateral Sc...

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2024 IEEE/SICE International Symposium on System Integration, SII 2024

作者： Uehara, Akira Sankai, Yoshiyuki Center for Cybernics Research R&d Center for Frontiers of Mirai in Policy and Technology Faculty of Engineering Information and Systems Tennodai 1-1-1 Ibraki Tsukuba Japan

ISBN: (纸本)9798350312072

Amyotrophic lateral sclerosis (ALS) gradually make it difficult for the patients to move, breath, and express their will as their symptoms progress associated with motor neuron. It is important for the patients to be able to not only communicate their daily needs to someone such as family member of caregivers but also perform their daily activities and participate in society and fulfill social roles without constant support by other people. To improve their ability of independence, the purpose of this study is to develop a cybernic interface that can perform daily living tasks by transiting seamlessly between cyberspace and physical space based on the patient's remaining voluntary motor functions, and confirm the basic performance of the developed interface. The system consists of bio-electrical signals measurement unit, display unit, processor unit, and IoT unit. The system controlled the flipping up and down the head-mounted display (HMd) by estimating the intention of transition between cyberspace and physical space based on the bio-electrical signals of the forearm. When the HMd is attached to the user's face, the user can move at the virtual environment, operate IoT device at the room of physical world via virtual environment, and select voice output for expressing own state by the gaze. To confirm the basic performance of the developed interface for performing daily living tasks by oneself, we conducted basic experiment with an able-bodied participant. As a result, the participant was able to flip up the HMd, move at virtual environment, and operate the TV and lock at the physical space without moving own body similar to ALS patients. In conclusion, we confirmed the basic performance of performing daily living tasks to improve the ability of independence for ALS patients. The cybernic interface that can connect central nervous system to cyberspace and physical space has a potential for removing constraints due to motor dysfunctions and spatial limitation. © 20

关键词： Virtual reality

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Numerical Simulation of Long-term Stability of Irregular Underground Salt Caverns under Alternating Loads 58

Numerical Simulation of Long-term Stability of Irregular Und...

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58th US rock Mechanics / Geomechanics Symposium 2024, ArMA 2024

作者： Chang, Zhi Xia, Yan Kun, dai Liu, Tianen Zhang, Qi Ban, Fansheng CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing China NO.1 Drilling Engineering Company BHDC Tianjin China CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing China

ISBN: (纸本)9798331305086

The proportion of green energy, such as photovoltaic and wind power, in power generation is increasing year by year. However, green energy often exhibits significant periodic fluctuations. Therefore, it is imperative to construct a large number of compressed air energy storage facilities to meet the daily demand for peak power regulation. Utilizing the dissolved cavity of salt rock layers to build underground salt cavern energy storage presents an economical and reliable solution due to the low permeability and self-repairing properties of salt rock. Nevertheless, most salt rock layers in China contain mudstone interlayers, which pose challenges in accurately controlling the shape of salt caverns during the water injection process within the dissolved cavity. This often results in irregularities, unevenness, and large curvatures near the mudstone interlayer within the cavity shape. Such irregularities on the inner wall of cavities pose a significant threat to long-term stability as they are prone to stress concentration and collapse. The present study establishes a sophisticated three-dimensional geometric model based on the geometry and geological conditions of underground salt caverns in the Hengyang area. Utilizing COMSOL, a numerical simulation is conducted to investigate the long-term creep stability of irregularly shaped salt caverns over a period of 30 years. The impact of salt cavern geometry on long-term stability is quantitatively assessed through key parameters such as volume shrinkage rate, plastic deformation, and stress concentration areas. Copyright 2024 ArMA, American rock Mechanics Association.

关键词： Caves

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The simulation study of high-performance micro-inductors Based on MEMS 3d coils 5

The simulation study of high-performance micro-inductors Bas...

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2023 5th International Conference on Energy, Power and Grid, ICEPG 2023

作者： Yi, Cheng Pi, Xingyu Chen, Hongyu Li, Xinrong Sun, Xuecheng Department of Electrical Engineering School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China Microelectronic R&D Center Shanghai University Shanghai200444 China

With the development of flexible electronics and microsystems, the demand for the miniaturization of electronic components is becoming increasingly urgent. due to the advantages of miniaturization, low power consumption, and easy integration, the micro-inductors fabricated by microfabrication technology get more and more attention. However, the traditional two-dimensional inductors are no longer able to meet the growing needs of today's society in terms of occupied areas, inductance values, and packaging costs. So, this paper proposes a three-dimensional structure thin film solenoid micro-inductor based on MEMS and analyzes it by using finite element method (FEM). The simulation focuses on recording the inductance values and quality factors of the micro-inductors with varying parameters in the frequency range of 0-2, 000 MHz. Additionally, the maximum current values corresponding to the micro-inductors with different parameters are recorded at the operating temperature of polyimide, specifically addressing the current-carrying capacity. The simulation result has certain theoretical guidance for high-performance micro-inductors design. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Flexible electronics

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