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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 606-612页

作者：吴建磊 CHEN Junzhu TIAN Xiaokun LI Jiahao gao wenkai YUE Yunlong 康俊峰 School of Materials Science and Engineering University of JinanJinan 250022China CDGM GLASS Co.LTD Chengda 610199China

In this work,the structure,viscosity and ion-exchange process of Na_(2)O-MgO-Al_(2)O_(3)-SiO_(2) glasses with different Al_(2)O_(3)/SiO_(2) molar ratios were *** results showed that,with increasing Al_(2)O_(3)/SiO_(2) ratio,the simple structural units Q_(1) and Q_(2) transformed into highly aggregated structural units Q_(3) and Q_(4),indicating the increase of polymerization degree of glass ***,the coefficient of thermal expansion decreased from 9.23×10^(-6)℃^(-1) to 8.88×10^(-6)℃^(-1).The characteristic temperatures such as melting,forming,softening and glass transition temperatures increased with the increase of Al_(2)O_(3)/SiO_(2) ratio,while the glasses working temperature range became *** increasing Al_(2)O_(3)/SiO_(2) ratio and prolonging ion-exchange time enhanced the surface compressive stress(CS)and depth of stress layer(DOL).However,the increase of ion exchange temperature increased the DOL and decreased the CS affected by stress *** was a good linear relationship between stress relaxation and surface compressive *** strengthening significantly improved the hardness of glasses,which reached the maximum value of(622.1±10)MPa for sample with Al_(2)O_(3)/SiO_(2) ratio of 0.27 after heat treated at 410℃for 2 h.

关键词： network structure viscosity ion exchange aluminosilicate glass

塔河地区特深井底部钻具组合力学模拟分析研究

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石油机械 2024年第8期52卷 70-76页

作者：王龙李文霞高文凯张谧陈俊龙唐雪平中国石化缝洞型油藏提高采收率重点实验室中国石化西北油田分公司石油工程技术研究院中国石油集团工程技术研究院有限公司中国石油海洋工程有限公司

特深层油气资源的高效开发对保障国家能源安全、实现能源接替具有重要意义,是当前油气勘探开发的重点领域。塔河地区油气资源丰富、埋藏深,勘探潜力巨大。为解决特深井钻探面临井底高温致使垂钻系统无法使用、常规钻具防斜能力弱、钻速... 详细信息

特深层油气资源的高效开发对保障国家能源安全、实现能源接替具有重要意义,是当前油气勘探开发的重点领域。塔河地区油气资源丰富、埋藏深,勘探潜力巨大。为解决特深井钻探面临井底高温致使垂钻系统无法使用、常规钻具防斜能力弱、钻速低等难题,基于广义纵横弯曲法、钻头-地层相互作用模型评价了邻井钻具防斜性能,反演了地层倾角、走向、各向异性系数。为特深井TS-X井提供现场支撑,针对寒武系与震旦系地层特性分析不同BHA结构对井斜影响效果,设计了包含螺杆钻具的底部钻具组合,并形成了最优结构方案。现场施工中代入实钻数据实时预测钻具防斜能力,形成了最优钻压参数方案。实钻结果表明,使用设计钻具具有防斜效果好、钻速快等优点,验证了模型的正确性和优化设计的合理性。研究结果对塔河地区其他特深井安全高效钻探、实现防斜打快具有重要指导意义。

关键词：超深井防斜打快塔河地区底部钻具组合

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旋转导向系统研究现状与发展趋势

钻采工艺 2024年第3期47卷 1-8页

作者：苏义脑窦修荣高文凯彭烈新张磊刘珂奚筱宛中国石油集团工程技术研究院有限公司油气钻完井技术国家工程研究中心

井眼轨道控制技术是石油钻井工程成套技术中的关键环节,旋转导向系统可在钻柱旋转钻进过程中根据地质和工程目标实时调整井眼轨迹,有效提高井眼轨道控制精度和钻进效率,进一步把钻井技术推向自动化、信息化的新阶段。国外历经近30年发展... 详细信息

井眼轨道控制技术是石油钻井工程成套技术中的关键环节,旋转导向系统可在钻柱旋转钻进过程中根据地质和工程目标实时调整井眼轨迹,有效提高井眼轨道控制精度和钻进效率,进一步把钻井技术推向自动化、信息化的新阶段。国外历经近30年发展,已形成种类齐全化、功能多样化和尺寸系列化的旋转导向系统产品。文章通过对旋转导向系统的发展过程进行简单回顾和总结,特别是在对当前实现商业化应用的各种旋转导向产品性能特点分析、技术现状对比的基础上,提出推动我国旋转导向系统发展建议,以便于正确认识当前的技术现状、展望未来发展趋势和把握研究方向,为我国油气资源安全高效开发提供有力的工程技术支撑。

关键词：旋转导向系统推靠式指向式混合式钻头导向

Crystallization Behavior and Kinetics of Lithium Aluminosilicate Glasses with Various Li_(2)O Contents

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Journal of Wuhan University of Technology(Materials Science) 2021年第2期36卷 243-247页

作者： HAN Jianjun HONG Wei JIANG Hong HE Jianxiong WANG Qianchen WANG Jing gao wenkai State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Special Glass Chengmai 571924China AVIC(Hainan)Special Glass Technology Co.Ltd. Chengmai 571924China

The crystallization behavior of Li_(2)O-Al_(2)O_(3)-SiO_(2) glasses with various concentration of Li2O were investigated by DSC,XRD,and *** h/l-quartz *** the main crystalline phase for all of the glass with the heat treatment of 720℃/3 h+800℃/1.5 h while the crystallinity and crystal size increase with the increase of Li2O *** to the negative thermal expansion coefficient of h/l-quartz s.s.,the thermal expansion coefficient of glass-ceramics decreases with the increasing of Li2O *** the Li2O content is 9mol%,the near-zero CTE20-700℃=-0.09×10^(-6)℃^(-1) is obtained upon the heat treatment of 720℃/3 h+800℃/1.5 *** crystallization activation energy of the glass with 9mol%Li2O is about 351 kJ/mol,and the crystallization mechanism is volume crystallization.

关键词： LAS glass-ceramics crystallization zero thermal expansion kinetics

Oil & Gas Drilling Technology in China:Past and Present

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China Oil & Gas 2009年第4期16卷 36-40页

作者： Su Yinao Huang Hongchun Zhou Yuhui gao wenkai Zeng Qiang CNPC Drilling Research Institute

Drilling is a prerequisite for oil and gas exploration. As one of the core upstream business of oil and gas exploration and development, it mainly includes

关键词：石油天然气勘探开发钻井技术钻探工艺开发效率工业发展

Efficient desorption and reuse of collector from the flotation concentrate:A case study of scheelite

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International Journal of Minerals,Metallurgy and Materials 2024年第11期31卷 2435-2444页

作者： Liming Tao Jianjun Wang Dejin Liao wenkai Jia Zihan Zhao Wenfang Che Zhongxu Qi Wei Sun Zhiyong gao School of Minerals Processing and Bioengineering Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral ResourcesEngineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and UtilizationCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing BGRIMM Technology GroupBeijing 102628China Mining Technology Research Center China Tungsten and Hightech Materials Co.Ltd.Chenzhou 423000China Luoyang Luanchuan molybdenum Group Co. Ltd.Luoyang 471500China Changsha Institute of Mining Research Co. Ltd.Changsha 410012China

Flotation is the most common method to obtain concentrate through the selective adsorption of collectors on target minerals to make them hydrophobic and *** the hydrometallurgy of concentrate,collectors adsorbed on concentrate can damage ion-exchange resin and increase the chemical oxygen demand(COD)value of *** this work,we proposed a new scheme,i.e.,desorbing the collectors from concentrate in ore dressing plant and reusing them in flotation *** nitrate and benzohydroxamic acid(Pb-BHA)complex is a common collector in scheelite *** this study,different physical(stirring or ultrasonic waves)and chemical(strong acid or alkali environment)methods for facilitating the desorption of Pb-BHA collector from scheelite concentrate were ***-mineral desorption tests showed that under the condition of pulp pH 13 and ultrasonic treatment for 15 min,the highest desorption rates of Pb and BHA from the scheelite concentrate were 90.48%and 63.75%,***-of-mine ore flotation tests revealed that the reuse of desorbed Pb and BHA reduced the collector dosage by 30%for BHA and 25%for *** strong alkali environment broke the chemical bonds between Pb and *** cavitation effect of ultrasonic waves effectively reduced the interaction intensity between Pb-BHA collector and scheelite *** method combining ultrasonic waves and strong alkali environment can effectively desorb the collectors from concentrate and provide“clean”scheelite concentrate for metallurgic plants;the reuse of desorbed collector in flotation flowsheet can reduce reagent cost for ore dressing plants.

关键词： scheelite concentrate collector desorption reuse flotation

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圆弧型井眼轨道设计模型的综合求解法

石油学报 2021年第2期42卷 226-232页

作者：洪迪峰唐雪平高文凯吕海川中国石油集团工程技术研究院有限公司北京102206

为让圆弧型井眼轨道设计模型的求解方法简洁、有效、快速且具有足够精度,提出了井眼轨道解析、扫描和迭代的综合求解法。讨论了三段制和五段制两种典型的圆弧型井眼轨道及其初值问题。对于三段制轨道,利用其几何性质直接给出解析计算公... 详细信息

为让圆弧型井眼轨道设计模型的求解方法简洁、有效、快速且具有足够精度,提出了井眼轨道解析、扫描和迭代的综合求解法。讨论了三段制和五段制两种典型的圆弧型井眼轨道及其初值问题。对于三段制轨道,利用其几何性质直接给出解析计算公式;对于五段制轨道,分为约束目标井段的井斜角或方位角、约束中间稳斜段的井斜角或方位角两大类,并建立了简洁的参数约束方程,提出了先以图谱扫描初步求解、再以此为初值迭代求解的综合求解方法。研究结果表明,所提出的算法简单实用,易于编程实现,在三维定向井和水平井设计中具有应用价值。

关键词：定向钻井三维设计井眼轨道圆弧型综合法

Record-high efficiency perovskite LEDs achieved by accelerating radiative recombination

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Science China Materials 2024年第9期67卷 3039-3040页

作者： Feng gao Department of Physics Chemistry and BiologyLinköping UniversityLinköping58183Sweden

Light-emitting diodes(LEDs)have revolutionized the lighting and displays due to their superior energy *** increasing demand for more efficient and brighter thin-film LEDs in flat-panel displays and solid-state lighting applications has driven extensive research into perovskite materials,which show great promise for high brightness and efficiency.

关键词： lighting radiative high

Stress tensor determination by modified hydraulic tests on pre-existing fractures:Method and stress constraints

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1637-1648页

作者： Guiyun gao Chenghu Wang Ke gao National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing100085China Beijing Engineering Research Center of Earthquake Observation Beijing100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing100085China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen518055China

The hydraulic testing of pre-existing fractures(HTPF)is one of the most promising in situ stress measurement methods,particularly for three-dimensional stress tensor ***,the stress tensor determination based on the HTPF method requires at least six tests or a minimum of 14-15 tests(under different conditions)for reliable *** this study,we modified the HTPF method by considering the shear stress on each pre-existing fracture,which increased the number of equations for the stress tensor determination and decreased the number of tests *** shear stresses were attributed to different fractures by random sampling;therefore,the stress tensors were obtained by searching for the optimal solution using the least squares criterion based on the Monte Carlo ***,we constrained the stress tensor based on the tensile strength criterion,compressive strength criterion,and vertical stress *** inverted stress tensors were presented and analyzed based on the tensorial nature of the stress using the Euclidean mean stress *** stress-measurement campaigns in Weifang(Shandong Province,China)and Mercantour road tunnel(France)were implemented to highlight the validity and efficiency of the modified HTPF(M-HTPF)*** results showed that the M-HTPF method can be applied for stress tensor inversion using only three to four tests on pre-existing fractures,neglecting the stress *** inversion results were confined to relatively small distribution dispersions and were significantly reliable and stable due to the shear stresses on the fractures and the stress constraints *** M-HTPF method is highly feasible and efficient for complete stress tensor determination in a single borehole.

关键词： Stress tensor Hydraulic tests on pre-existing fractures Mean stress Stress constraint Hydraulic fracturing

Diaporthe actinidiicola:A Novel Species Causing Branch Canker or Dieback of Fruit Trees in Henan Province,China

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Diaporthe actinidiicola:A Novel Species Causing Branch Canke...