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复合磨损套管爆裂失效机理及剩余强度预测

天然气工业 2024年第3期44卷 172-183页

作者：邓宽海张明彭阳周念涛姚明远林元华油气藏地质及开发工程全国重点实验室·西南石油大学中国石油石油管工程重点实验室·西南石油大学

超深井、水平井、大位移井等复杂油气井服役工况异常恶劣,套管复合磨损严重,将对井筒完整性构成巨大威胁,且磨损套管剩余强度难以精准预测。为此,基于塔里木盆地塔中北坡顺南区块501井套管磨损数据及P110管材应力—应变本构关系,建立了... 详细信息

超深井、水平井、大位移井等复杂油气井服役工况异常恶劣,套管复合磨损严重,将对井筒完整性构成巨大威胁,且磨损套管剩余强度难以精准预测。为此,基于塔里木盆地塔中北坡顺南区块501井套管磨损数据及P110管材应力—应变本构关系,建立了充分考虑钻杆本体和接头联合造成的磨损模式、夹角、磨损重叠深度及磨损深度的复合磨损套管有限元力学模型,并开展了多种复合磨损模式下套管弹塑性变形、屈服、裂纹萌生、扩展及爆裂行为模拟,得到了不同复合磨损套管应力分布、剩余抗内压屈服强度及爆裂强度。研究结果表明:(1)月牙夹角在0°~90°时,应力干涉削弱应力集中,月牙夹角在90°~180°时,应力干涉增强应力集中,这种交互作用机制导致磨损套管剩余强度随着月牙夹角增加而先增加后降低;(2)裂纹萌生并起始于等效应力最大的位置即磨损月牙中心,并垂直于最大环向应力沿径向从套管内壁向外壁扩展,且裂纹一旦萌生,裂纹将迅速扩展并发生爆裂失效;(3)灰色关联度分析确定了复合磨损套管剩余强度对磨损深度、月牙夹角、复合磨损形式、月牙重叠深度的敏感性,分析结果表明磨损深度是决定套管剩余强度的主控因素。结论认为,该认识为套管强度设计与优化提供了技术参考,并对准确预测复合磨损套管剩余强度和确保井筒安全及完整性具有重要意义。

关键词：油气井复合磨损套管失效机理应力干涉应力集中应力交互剩余强度

新型高效咪唑希夫碱缓蚀剂对Q235钢在1 mol/L HCl溶液中的缓蚀作用

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中国腐蚀与防护学报 2024年第1期44卷 59-70页

作者：王鹏杰宋昱灏樊林邓宽海李忠慧梅宗斌郭雷林元华西南石油大学油气藏地质及开发工程国家重点实验室成都610500 西南石油大学新能源与材料学院成都610500 长江大学石油工程学院武汉434023 四川华宇钻采装备有限公司泸州646000 铜仁学院材料与化学工程学院铜仁554300

以油酸、二乙烯三胺、碘代正丁烷和肉桂醛等为原料,在不同温度下进行酰胺化、脱水环化、季铵化等过程设计合成一种适用于酸洗工况的咪唑希夫碱(MIX)缓蚀剂,通过失重实验、电化学实验、理论模拟和表面分析等方法系统的探究了MIX在1.00 mo... 详细信息

以油酸、二乙烯三胺、碘代正丁烷和肉桂醛等为原料,在不同温度下进行酰胺化、脱水环化、季铵化等过程设计合成一种适用于酸洗工况的咪唑希夫碱(MIX)缓蚀剂,通过失重实验、电化学实验、理论模拟和表面分析等方法系统的探究了MIX在1.00 mol/L HCl溶液中对Q235钢的缓蚀性能及其缓蚀机理。结果表明:在浓度为2.00 mmol/L时,采用失重实验,电化学阻抗(EIS),动电位极化(Tafel)测得的缓蚀效率分别为98.64%,96.93%和99.15%,表明MIX在HCl环境中能够发挥优异的缓蚀性能。电化学实验和等温吸附模型表明,MIX是一种阴极型缓蚀剂,能够自发吸附在Q235钢表面,且遵循Langmuir吸附等温模型。MIX能够在Q235钢表面形成稳定的保护膜,进一步阻碍了腐蚀体系内电荷转移速率。XPS,EDS和FT-IR分析证实了MIX分子能够吸附在Q235钢表面,密度泛函理论(DFT)说明MIX的活性位点为苯基,咪唑环上的N原子,分子动力学(MD)进一步证实了MIX能够吸附在Q235钢表面。MIX在HCl环境中能够发挥优异的缓蚀性能,主要在于Q235钢表面形成了稳定的保护膜,降低了腐蚀体系内电荷转移速率。

关键词：咪唑希夫碱电化学失重实验缓蚀性能理论计算

N,N'-亚甲基双丙烯酰胺与OP-10对Q235钢在1 mol/L HCl中的缓蚀作用

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电镀与精饰 2024年第7期46卷 49-57页

作者：樊林王鹏杰宋昱灏刘婉颖梅宗斌林元华西南石油大学油气藏地质及开发工程国家重点实验室四川成都610500 西南石油大学新能源与材料学院四川成都610500 华宇钻采装备有限公司四川泸州646000

针对在酸洗工况下金属的腐蚀问题,为解决单一缓蚀剂的成本高、效率低的问题,在N,N’-亚甲基双丙烯酰胺(NN)的最佳缓蚀浓度基础上将其与OP-10复配(N&P),采取失重实验、电化学实验、表面分析和理论模拟的方法,研究了NN和N&P缓蚀剂对Q235钢... 详细信息

针对在酸洗工况下金属的腐蚀问题,为解决单一缓蚀剂的成本高、效率低的问题,在N,N’-亚甲基双丙烯酰胺(NN)的最佳缓蚀浓度基础上将其与OP-10复配(N&P),采取失重实验、电化学实验、表面分析和理论模拟的方法,研究了NN和N&P缓蚀剂对Q235钢在1.0 mol/L HCl溶液中的缓蚀性能。结果表明:在30℃条件下,NN的交流阻抗谱、动电位极化曲线和失重实验所得的最佳缓蚀率分别为73.32%、85.57%、77.46%,而将NN与OP-10复配后的缓蚀效率分别提升至92.34%、96.26%、90.14%。量子化学表明:N&P吸附位点主要为OP-10分子中的大Π键和C-O键以及NN分子中的C=O键、C=C键、C-N键,具有较好的协同效应。

关键词： N’N-亚甲基双丙烯酰胺 OP-10 电化学失重实验缓蚀性能量子化学

Anti-Jahn-Teller effect induced ultrafast insulator to metal transition in perovskite BaBiO_(3)

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npj Computational Materials 2022年第1期8卷 2148-2154页

作者： Nan Feng Jian Han Changpeng lin Zhengwei Ai Chuwen Lan Ke Bi yuanhua lin Kan-Hao Xue Ben Xu State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and Telecommunications100876BeijingChina Graduate School of China Academy of Engineering Physics 100193BeijingChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua University100084BeijingChina Theory and Simulation of Materials(THEOS) École Polytechnique Fédérale de LausanneCH-1015LausanneSwitzerland School of Integrated Circuits School of Optical and Electronic InformationHuazhong University of Science and Technology430074WuhanChina

The Jahn-Teller(JT)effect involves the ions M with a degenerate electronic state distorting the corner-sharing MO_(6)octahedra to lift the degeneracy,inducing strong coupling of electrons to lattice,and mediating the exotic properties in perovskite ***,the anti-Jahn–Teller(AJT)effect refers to the deformation against the Jahn-Teller-distorted MO_(6)***,it is difficult to experimentally execute both effects descending from the fine-tuning of crystal *** propose the AJT can be introduced by THz laser illumination at 11.71 THz in a candidate superconducting perovskite material BaBiO_(3)near room *** illumination coherently drives the infrared-active phonon that excites the Raman breathing mode through the quadratic-linear nonlinear *** process is characterized by the emergence of an AJT effect,accompanied by an insulator-to-metal transition occurring on the picosecond *** study underlines the important role of crystal structure engineering by coherent phonon excitation in designing optoelectronic devices.

关键词： tuning effect illumination

Novel fast ionic conductor ceramic composite separator for highperformance safe Li-ion power batteries

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Journal of Materiomics 2022年第6期8卷 1184-1190页

作者： Yuchuan Feng Minghui Wang lina Gao Zhaoling He Kai Chen Zheng Li Hongcai He yuanhua lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Qingtao Institute of New Energy Materials Qingtao(Kunshan)Energy Development Co.LtdKunshan215300JiangsuChina Suzhou Qingtao New Energy S&T Co Ltd Kunshan215300JiangsuChina Yichun Qingtao Energy S&T Co.Ltd Yichun336000JiangxiChina

The ceramic composite separators coated with silica or alumina particles have been used in power batteries due to their better electrolyte wettability and better thermal stability compared with bare polymer ***,these oxide ceramics are Liþion insulators,which increase internal resistance and hinder the improvement of rate capability of ***,we report a strategy to further improving the performance of lithium-ion batteries(LIBs)by using fast ionic conductor ceramic composite separator as an alternative to traditional ceramic coated *** lanthanum titanate(LLTO),a fast ionic conductor with excellent room temperature bulk conductivity,are coated on the common polyethylene(PE)*** results demonstrate that such a novel LLTO-coated separator possess excellent electrolyte wettability and thermal stability;and the assembled NCM523/graphite lithium-ion pouch cells with LLTO-coated separator show better rate capability and cyclic performance with 88.7%capacity retention after 1000 cycles at room temperature compared with the pouch cells with Al2O_(3)-coated *** fast ionic conductor ceramic composite separators will be a potential competitor to the next-generation novel separators for high-performance Li-ion power batteries.

关键词： Li-ion batteries Ceramic composite separator LLTO Fast ionic conductor Pouch cells

Continuously released Zn^(2+)in 3D-printed PLGA/β-TCP/Zn scaffolds for bone defect repair by improving osteoinductive and anti-inflammatory properties

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Bioactive Materials 2023年第6期24卷 361-375页

作者： Chunxu Li Fengbo Sun Jingjing Tian Jiahao Li Haidan Sun Yong Zhang Shigong Guo yuanhua lin Xiaodan Sun Yu Zhao Department of Orthopedics Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100730China State Key Laboratory of Advanced Ceramics and Fine Processing School of MaterialsTsinghua UniversityBeijingChina Medical Science Research Center Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Core Facility of Instrument Institute of Basic Medical SciencesChinese Academy of Medical Sciences and School of Basic MedicinePeking Union Medical CollegeBeijingChina The State Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical Sciences and School of Basic MedicinePeking Union Medical CollegeBeijingChina Department of Rehabilitation Medicine Southmead HospitalBristolUK

Long-term nonunion of bone defects has always been a major problem in orthopedic *** bone graft materials such as Poly(lactic-co-glycolic acid)/β-tricalcium phosphate(PLGA/β-TCP)scaffolds are expected to solve this problem due to their suitable degradation rate and good ***,insufficient mechanical properties,lack of osteoinductivity and infections after implanted limit its large-scale clinical ***,we proposed a novel bone repair bioscaffold by adding zinc submicron particles to PLGA/β-TCP using low temperature rapid prototyping 3D printing *** first screened the scaffolds with 1 wt%Zn that had good biocompatibility and could stably release a safe dose of zinc ions within 16 weeks to ensure long-term *** designed,the scaffold had a multi-level porous structure of biomimetic cancellous bone,and the Young’s modulus(63.41±1.89 MPa)and compressive strength(2.887±0.025 MPa)of the scaffold were close to those of cancellous *** addition,after a series of in vitro and in vivo experiments,the scaffolds proved to have no adverse effects on the viability of BMSCs and promoted their adhesion and osteogenic differentiation,as well as exhibiting higher osteogenic and anti-inflammatory properties than PLGA/β-TCP scaffold without zinc *** also found that this osteogenic and anti-inflammatory effect might be related to Wnt/β-catenin,P38 MAPK and NFkB *** study lay a foundation for the follow-up study of bone regeneration mechanism of Zn-containing *** envision that this scaffold may become a new strategy for clinical treatment of bone defects.

关键词： 3D printing Zinc submicron particles Osteoinductivity Anti-inflammatory Bone defect repair

n型Pb_(1+x)SeTe_(x)固溶体的自蔓延高温合成及热电性能调控

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铜业工程 2024年第3期 40-46页

作者：张文钰周志方郑云鹏杨岳洋南策文林元华清华大学材料学院新型陶瓷与精细加工国家重点实验室北京100084

热电材料能实现热能与电能之间的直接转化,因而受到广泛关注。铅基硫属化合物是一类具有较高热电转化效率的材料,其中,PbSe和PbTe是这类材料的代表。与Te相比,Se元素的地壳丰度高、成本低,所以PbSe更具研究价值和应用潜力。但PbSe的晶... 详细信息

热电材料能实现热能与电能之间的直接转化,因而受到广泛关注。铅基硫属化合物是一类具有较高热电转化效率的材料,其中,PbSe和PbTe是这类材料的代表。与Te相比,Se元素的地壳丰度高、成本低,所以PbSe更具研究价值和应用潜力。但PbSe的晶格热导相对较高,载流子浓度较低,抑制了热电性能的提升。而固溶能有效降低晶格热导率,提升热电性能,且PbTe和PbSe具有相似的能带结构,能简化输运研究,因此将PbTe与PbSe固溶,有望获得较高的热电性能。另外,在目前的研究中,PbSe的合成通常采用机械合金化、熔融退火等方式,耗费大量的时间和能量,生产成本高,不利于实际使用。本文使用自蔓延高温合成与放电等离子体烧结相结合的方式,快速制备了n型Pb_(1+x)SeTe_(x)固溶体。同时,由于载流子浓度的优化及合金散射的作用,电学性能和热学性能得到了提升,晶格热导率在773 K时降低到0.67W/(m·K),相较于纯PbSe降低了35%,无量纲优值ZT值在773 K时达到了1.1,相较于纯PbSe提升了83%。以上研究为自蔓延制备工艺在热电领域的广泛应用提供了参考。

关键词：自蔓延高温合成 PbSe Pb_(1+x)SeTe_(x)固溶体载流子浓度晶格热导率

ZnO varistors with high voltage gradient and low leakage current by doping rare-earth oxide

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Science China(Technological Sciences) 2008年第6期51卷 693-701页

作者： HE JinLiang HU Jun lin yuanhua Sate Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Key Lab of New Ceramics and Fine Processing Department of Material Science and EngineeringTsinghua UniversityBeijing 100084China

The surge arrester of 1000 kV gas-insulated substation (GIS) needs ZnO varistor with high voltage gradient to effectively improve the potential distribution along ZnO varistor column inside the metal-oxide surge arresters. In this paper, the elec-trical and structural parameters of ZnO varistors are changed by doping with some rare-earth oxides, and the mechanism which leads these changes is discussed. When rare-earth oxide additives are added into ZnO varistors, the growing speed is slowed down due to the stabilization of the new spinel phases formed in the grain-boundary by rare-earth oxide additives, then the size of ZnO grains is smaller, and the voltage gradient of varistor increases obviously. By adding suitable amount of oxides of metal Co and Mn, the leakage current can be effectively decreased and the nonlinearity coefficient increased. The novel ZnO varistor samples sintered with the optimal additives have a voltage gradient of 492 V/mm, and the nonlinearity coefficient of 76, but their leakage currents are only 1 μA.

关键词： ZnO varistors rare-earth oxide U-I characteristics voltage gradient leakage current nonlinear coefficient spinel

Thermoelectric Properties of Ca_3Co_4O_9/Polyaniline Composites

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Journal of Materials Science & Technology 2014年第4期30卷 423-426页

作者： Bin Zheng yuanhua lin Jinle Lan Xiaoping Yang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and EngineeringTsinghua University

Ca3Co409/polyaniline bulk composites have been successfully fabricated by ball-milling and hot-pressing method. Our results indicate that the Seebeck coefficient can be increased nearly by 400% with adding 15 wt% 0a3Co409 to the polyaniline. The thermal conductivity changes slightly with increasing filler content. The highest figure of merit, ZT can reach 5× 10-4 at 329 K for these bulk composites, which is almost 50 times larger than that of pure polyaniline, suggesting that the polymer-thermoelectric oxide composites are promising candidates for light-weight, low-cost and non-toxic thermoelectric applications.

关键词： Polyaniline Ca3C0409 Thermoelectric Composite