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11th International Field Exploration and development conference, IFEdC 2021

作者： Zhao, Yi-peng CNPC Engineering Technology R&D Co. Ltd. Beijing102200 China

ISBN: (纸本)9789811921483

The development trend of drilling engineering software is information integration, 3d visualization and intelligent drilling. In the aspect of 3d visualization, the 3d virtual space of downhole environment is established to intuitively display multi-disciplinary information of drilling engineering, geology, oil reservoir, etc., which provides a man-machine interactive virtual environment for collaborative design and construction of personnel in different professional fields. The 3d visualization module of drilling engineering integrated software platform based on geology and reservoir visualization is developed, and the 3d visualization software of reservoir based on WPF is developed, which realizes the interactive operation of well trajectory, reservoir model roaming, zooming, moving, viewpoint switching and so on. 3d visualization module provides support for remote operation, improves operation efficiency and realizes integrated collaborative work. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte ltd.

关键词： Visualization

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Case retrieval Strategy of Turning Process Based on Grey relational Analysis

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computer Modeling in engineering & Sciences 2024年第2期138卷 1663-1678页

作者： Jianfeng Zhao Yunliang Huo Ji Xiong Junbo Liu Zhixing Guo Qingxian Li School of Mechanical Engineering Sichuan UniversityChengdu610065China Sichuan Engineering Technology Research Center of Intelligent Design and Service for Cutting Tools Yibin R&D Park of Sichuan UniversityYibin644000China Department of R&D Pengxi Heye High-Tech Co.Ltd.Suining629000China

To solve the problem of long response time when users obtain suitable cutting parameters through the Internet based platform,a case-based reasoning framework is ***,a Hamming distance and Euclidean distance combined method is designed to measure the similarity of case features which have both numeric and category *** addition,AHP(Analytic Hierarchy Process)and entropy weight method are integrated to provide features weight,where both user preferences and comprehensive impact of the index have been *** relation analysis is used to obtain the similarity of a new problem and alternative ***,a platform is also developed on Visual Studio 2015,and a case study is demonstrated to verify the practicality and efficiency of the proposed *** method can obtain cutting parameters which is suitable without iterative *** with the traditional PSO(Particle swarm optimization algorithm)and GA(Genetic algorithm),it can obtain faster response *** method can provide ideas for selecting processing parameters in industrial *** guaranteeing the characteristic information is similar,this approach can select processing parameters which is the most appropriate for the production process and a lot of time can be saved.

关键词： CBr turning process grey relation AHP entropy weight

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research on welding deformation control technology of battery electric vehicle framed aluminum body

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Progress in Natural Science:Materials International 2024年第1期34卷 108-121页

作者： Bo Liu Jian Yang Jia Li Xiaolin Liao Qin Yang Jinsheng Zhang Tiegang Hu Shuxun Jiang School of Mechanical Engineering University of Science and Technology Beijing Chongqing Industry Polytechnic College Global R&D Center Chongqing Changan Automobile Co. Ltd Farizon New Energy Commercial Vehicle Group

The welding process of aluminum(Al) alloy car body has problems such as poor weld quality, low welding co-efficient, and large welding deformation. This paper mainly focuses on material accuracy design, lap structure design, simulation, and process manufacturing to break through the precision control problems caused by welding deformation of battery electric vehicle Al alloy car body. First, the 209 key functional dimensional chains of Al body-in-white are analyzed and decomposed to component and profile tolerance dimensions step by ***, the differences of vertical butt, bevel butt, and plug structures are studied and joint matching is implemented in a targeted manner. Subsequently, through welding deformation simulation analysis and welding sequence optimization, the body-in-white welding process and tooling fixtures are guided and designed to ensure that the dimensional accuracy of the Al body is controlled to ±2 mm in all aspects. Finally, the design of the whole vehicle arrangement of mechanical, human-machine, and major components is carried out, and an all-Al framed battery electric vehicle lightweight platform with different sizes and ranges is innovatively created. The difficulties such as the contradiction between power battery size and arrangement space, unreasonable arrangement position, and load distribution are solved.

关键词： Aluminum alloy Frame structure Welding deformation simulation dimensional accuracy control Battery electric vehicle lightweight platform

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A Calculation Method of double Strength reduction for Layered Slope Based on the reduction of Water content Intensity

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computer Modeling in engineering & Sciences 2024年第1期138卷 221-243页

作者： Feng Shen Yang Zhao Bingyi Li Kai Wu School of Civil Engineering Suzhou University of Science and TechnologySuzhou215011China R&D Department Suzhou Jcon Greenbuild Fabricated Co.Ltd.Suzhou215004China

The calculation of the factor of safety(FOS)is an important means of slope *** paper proposed an improved double strength reductionmethod(drM)to analyze the safety of layered *** physical properties of different soil layers of the slopes are different,so the single coefficient strength reduction method(SrM)is not enough to reflect the actual critical state of the *** that the water content of the soil in the natural state is the main factor for the strength of the soil,the attenuation law of shear strength of clayey soil changing with water content is *** paper also establishes the functional relationship between different reduction ***,a USdFLd subroutine is programmed using the secondary development function of finite element *** the relationship between field variables and calculation time realizes double strength reduction applicable to the layered ***,by comparing the calculation results of different examples,it is proved that the stress and displacement distribution of the critical slope state obtained by the improved method is more realistic,and the calculated safety factor is more *** newly proposedmethod considers the difference of intensity attenuation between different soil layers under natural conditions and avoids the disadvantage of the strength reduction method with uniform parameters,which provides a new idea and method for stability analysis of layered and complex slopes.

关键词： double strength reduction slopes stability water content factor of safety numerical methods

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Sensitivity Study of Bingham Fluid Flow by the ratio of Inner and Outer diameters of Annulus 13th

Sensitivity Study of Bingham Fluid Flow by the Ratio of Inne...

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13th International Field Exploration and development conference, IFEdC 2023

作者： Zhao, Yi-Peng Li, Jia-Xin Wang, Hai-Ge Cui, Meng Lin, Li-Ming CNPC Engineering Technology R&D Company Ltd. Beijing China China University of Petroleum Beijing China Institute of Mechanics CAS Beijing China

ISBN: (纸本)9789819702558

As for flow of drilling fluids, typically for laminar flow and friction of Bingham plastic fluid, in a concentrate annulus, direct numerical simulations (dNS) are carried out and compared with Mr (Metzner reed, Mr) approximate solutions. As the sensitivity research parameter of present paper, the ratio of inner and outer diameter of annulus is prescribed to be 0.3, 0.5, 0.7 and 0.9. As such ratio decreases, the difference between velocity profiles obtained by dNS and Mr approximate solutions keeps increasing;compared with dNS, ranges of flow cores via Mr approximate solutions are varied from narrow to wide;differences between two maximal velocities also gradually increase, even up to 4%. As for frictional coefficients computed by dNS, Mr approximate solutions and Landmark software, Mr approximate solutions are close to dNS with mean error of 1.8%;however, the results obtained by Landmark software are generally small with the mean error of 23%. © The Author(s), under exclusive license to Springer Nature Singapore Pte ltd. 2024.

关键词： Laminar flow

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Mesoporous SiO_(2)nanoparticles with low surface energy and multi-level roughness as shale wellbore stabilizers in oil-based drilling fluid

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Petroleum Science 2025年第1期22卷 384-397页

作者： Hong-Yan du Kai-He Lv Jin-Sheng Sun Mei-Chun Li Yuan Geng Xian-Bin Huang Hao-Kun Shen Muhammad Arqam Khan School of Petroleum Engineering China University of PetroleumEast ChinaQingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development Ministry of EducationQingdao266580ShandongChina CNPC Engineering Technology R&D Company Ltd. Beijing102206China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing210000JiangsuChina Department of Petroleum Engineering NED University of Engineering&Technology395007Pakistan

Oil-based drilling fluids possess excellent properties such as shale inhibition, cuttings suspension, and superior lubrication, making them essential in the development of unconventional oil and gas ***, wellbore instability, caused by the invasion of drilling fluids into shale formations, remains a significant challenge for the safe and efficient extraction of shale oil and gas. This work reports the preparation of mesoporous SiO2nanoparticles with low surface energy, utilized as multifunctional agents to enhance the performance of oil-based drilling fluids aimed at improving wellbore stability. The results indicate that the coating prepared from these nanoparticles exhibit excellent hydrophobicity and antifouling properties, increasing the water contact angle from 32°to 146°and oil contact angle from 24°to134.8°. Additionally, these nanoparticles exhibit exceptional chemical stability and thermal *** these nanoparticles into oil-based drilling fluids reduced the surface energy of the mud cake from 34.99 to 8.17 m J·m-2and increased the roughness of shale from 0.26 to 2.39 μm. These modifications rendered the mud cake and shale surfaces amphiphobic, effectively mitigating capillary infiltration and delaying the long-term strength degradation of shale in oil-based drilling fluids. After 28days of immersion in oil-based drilling fluid, shale cores treated with MF-SiO2exhibited a 30.5% increase in compressive strength compared to untreated cores. Additionally, these nanoparticles demonstrated the ability to penetrate and seal rock pores, reducing the API filtration volume of the drilling fluid from11.2 to 7.6 m L. This study introduces a novel approach to enhance the development of shale gas and oil resources, offering a promising strategy for wellbore stabilization in oil-based drilling fluid systems.

关键词： Fluorosilane Wettability Wellbore stability drilling engineering Self-cleaning Antifouling

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rotor Skewed Pole Analysis of Permanent Magnet Synchronous Motor Based on Energy Method and Fourier Series Analysis 9

Rotor Skewed Pole Analysis of Permanent Magnet Synchronous M...

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9th Asia conference on Power and Electrical engineering, ACPEE 2024

作者： Cheng, Hu Zhequan, Wu dejun, Yin rubing, Liu Nanjing University of Science and Technology School of Mechanical Engineering Nanjing China Jiaxipera Technology R&D Co. Ltd Motor R&D Department Hangzhou China

ISBN: (纸本)9798350309638

Aiming at the cogging torque of permanent magnet synchronous motor (PMSM), a method for expressing the cogging torque under the condition of rotor skewed pole of PMSM based on energy method and Fourier series analysis is proposed. The mathematical model between the cogging torque and the rotor skewed pole angle is established. Based on this, the optimal skew pole angle corresponding to the minimum cogging torque under continuous skewed pole and segmented skewed pole is derived. Based on this mathematical model, the output torque expression of PMSM under segmented skewed pole is further obtained. The simulation results prove that the cogging torque is weakened by 63.7 %, the cogging torque is weakened by 81.6 %, the waveform of the back-EMF is optimized and improved, and the high-order harmonic amplitude is effectively weakened, and the THd of back-EMF is reduced by 66.3 %. © 2024 IEEE.

关键词： Fourier series

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Application of Near-Bit LWd Gamma Image Logging in Horizontal coalbed Methane reservoir 13th

Application of Near-Bit LWD Gamma Image Logging in Horizonta...

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13th International Field Exploration and development conference, IFEdC 2023

作者： Yang, Qiu-Yi Mao, Wei-Min Fan, Yi-Feng Jia, Heng-Tian Feng, Ze-dong Xie, Xia CNPC Engineering Technology R&D Company Ltd. Beijing China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing China Qoiltech Company Ltd. Wuxi China

ISBN: (纸本)9789819702558

For judging the formation lithology accurately, guiding the tool to drill in target reservoir, correcting drilling trajectory timely and improving the encounter rate, a near-bit 16-sector imaging LWd system that can be used in water-base and oil-base drilling fluid is presented in this paper. The LWd system is consisted of near-bit gamma imaging sub, screw and data receiving sub. It can be used in unconventional reservoirs such as shale and coalbed methane reservoir to achieve data measurement and stable transmission of near-bit deviation and gamma-ray. compared with 8-sector gamma imaging, the application of 16-sector dynamic high-precision gamma scanning imaging technology provides more precise, accurate and timely parameters measurement. The near-bit gamma imaging LWd system has been provided successfully used in coalbed methane reservoir. The field application shows that this system exhibits excellent identification for coal lines and carbonaceous mudstones, and could guide drilling tool back to reservoir in the absence of formation, with the drilling ratio of reservoir by 97%. The application of near-bit gamma imaging LWd system in horizontal coalbed methane lay foundation for the study of dynamic high-precision gamma scanning imaging technology used in unconventional reservoirs. © The Author(s), under exclusive license to Springer Nature Singapore Pte ltd. 2024.

关键词： Methane

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development and Application of Automatic Feeding device for drilling Fluid Additive 12th

Development and Application of Automatic Feeding Device for ...

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12th International Field Exploration and development conference, IFEdC 2022

作者： Xiao, Jian-Qiu Yang, Hui Wang, Ying Shao, Qiang Hu, Zhi-Jian Han, Fei CNPC Engineering Technology R&D Company Limited Beijing China CNPC Oilfield Technology Service Co. Ltd. Beijing China Equipment Department of Fourth Drilling Company BHDC Tianjin China

ISBN: (纸本)9789819919635

In order to improve the HSE level during drilling fluid preparation and maintenance, the first domestic multi-tank drilling fluid additive automatic feeding device was developed. It uses pneumatic conveying method to automatically convey powder drilling fluid additive to mud mixing system in a closed environment. The device can automatically complete various functions such as feeding, discharging, turning, and recycling with one key. The field application test proves that according to the drilling fluid regulation requirements, the drilling fluid additive is accurately transported to the mud mixing system according to the set parameters through automatic operation in a closed environment, and the automatic and precise regulation of the drilling fluid and zero leakage, zero emission and zero pollution are realized. It effectively solves the problems of traditional manual feeding methods, such as low operation efficiency, uneven mixing of drilling fluid additive, low feeding accuracy, great human harm, high environmental pollution, and material waste, and significantly improves the automation of drilling rigs and the level of field HSE. The research has broken through difficult technologies such as automatic conveying of multi-character materials, high-efficiency material-gas separation, dust collecting and gas removal, and batching control. compared with similar products at home and abroad, the comprehensive performance has reached the international advanced level. © The Author(s), under exclusive license to Springer Nature Singapore Pte ltd. 2023.

关键词： Feeding

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mtdNA-triggered pH response signal-amplified fluorescent probe for multiple cell discrimination

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Chinese Chemical Letters 2024年第3期35卷 363-368页

作者： Tianping Xia Yanxian Hou Zhuoran Xia Gengwen Chen Peichen Tang Jiangli Fan Xiaojun Peng State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials Oriented Chemical EngineeringDalian University of TechnologyDalian 116024China Hematology Reagent R&D Department Mindray Bio-medical Electronics Co.Ltd.Shenzhen 518132China Research Institute of Dalian University of Technology in Shenzhen Shenzhen 518057China

developing fluorescence probes with multiple responses has vital significance but remains ***,for the first time,we present a mitochondrial dNA(mtdNA)-triggered pH response signalamplified fluorescent probe(QCY-dBT)for multiple cell *** probe exhibited a large stokes shift(229 nm),excellent dNA selectivity over rNA,and ultrasensitivity of detection limit(dL;74.0 ng/mL).Thus,QCY-dBT was successfully applied to analyze multiple human peripheral blood cells and visualize mtdNA in healthy and apoptotic *** the tumor acidic environment(pH 6.0–7.0),the absorbance of QCY-dBT at 436 nm increased,and the fluorescence signal(665 nm)was amplified by mtdNA,which enabled the direct observation of tumor *** study provides help in designing smart probes with multiple responses for efficient abnormal cell detection.

关键词： Fluorescence probe Mitochondrial dNA pH response Peripheral blood cells Multiple cell detection

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