陆地钻机钻具自动运移装置研制

针对目前国内传统的钻井工艺下人工运移钻具所存在的问题,设计了陆地钻机钻具自动运移系统。对于陆地50型钻机,该自动运移系统可实现钻杆、套管及钻铤在钻台和地面排放架之间安全、高效地自动运移。文中对该系统各部分结构进行了具体设计,对所用材料、焊接工艺进行了选择和制定;对系统的核心——起升装置设计进行了力学性能计算及相应的液压缸选型。设计结果能够满足目前钻井工艺对自动化的需求。     

陆地钻机二层台自动排管系统研制

在石油钻井工作中,需要反复起下钻,目前自动排管系统主要用于海洋钻井,陆地钻机配备较少,钻井效率仍然低下,井架工工作量大且繁重。为了提高陆地钻井效率,降低工人劳动强度,针对陆地上常用的K型井架和X-Y型排管架结构,基于成熟的PLC技术设计了一套可直接安装于二层台与钻台之间的自动排管系统。该系统由二层台机械手与钻台辅助机械手两部分组成,这两部分相互配合共同完成起下钻工作,实现在起下钻和接单根作业流程中钻杆的自动夹持、下放、提升、平移等全程无人数字化自动控制。该系统有益于提高钻井效率,促进钻井过程科学化管理,是目前较为先进实用的二层台自动排管系统。     

陆地钻机立柱式钻杆自动传送系统研究

介绍一种陆地钻机立柱式自动传送系统的结构组成、主要技术参数、工作原理,对主要参数进行了分析与计算。该系统适用于陆地深部钻机,能实现钻杆的自动化传送。     

全液压自动猫道钻杆运移系统设计及仿真分析

根据大陆科学钻探钻机自动猫道的设计要求,设计了猫道的钻杆运移系统。系统具有机构新颖、动作稳定可靠、控制方便等优点,能够代替人工完成在钻井过程中运移钻杆的动作,实现钻具的自动运移。简要介绍了钻杆运移系统的结构组成、工作原理及系统的动作流程,并利用Inventor软件为设计平台建立钻杆运移系统模型,并在此基础上运用ADAMS仿真软件建立仿真模型。对系统进行运动学仿真模拟,得到钻杆运移系统与钻杆之间接触力的变化以及钻杆运移系统关键部位的应力变化。通过仿真分析验证了系统的稳定性,为系统实际动作的优化及控制提供了理论依据。     

长庆钻井总公司液压动力猫道试验成功

2013年10月13日,川庆钻探长庆钻井总公司首部液压动力猫道试验成功。该装置可自动完成钻杆、套管、钻铤及其他钻具上下钻台和钻具转移作业,标志着该公司在提升钻井作业自动化水平方面又迈出坚实一步。     

全自动石油钻杆校直机的研究与应用

为提高校直效率和减少工人劳动强度,研制了自动石油钻杆校直机。设计了钻杆挠度检测方法,选用激光位移传感器检测钻杆弯曲挠度,利用编码器定位压头施压位置及支点位置,根据弹塑性理论与实际经验确定压头下压行程。设计了自动校直机控制系统,能够显示钻杆挠度和输入参数,可以对不同钢级和尺寸的钻杆进行校直,并可以输出报表。配备了自动上下料系统,能够实现自动上料和下料。现场使用证明:该自动校直机减少了工人劳动量,提高了钻杆校直过程的自动化。     

钻杆排放机械手运动学分析及轨迹控制仿真

针对石油钻机钻杆竖直排放的特点和要求,设计了一种新型自动排放机械手。介绍了该机械手的总体结构和工作原理,对其进行了运动学分析,通过运用D-H方法和雅克比矩阵建立了末端夹持器与动作关节之间运动参数的变换关系,最后利用Simulink进行了轨迹控制仿真。结果表明,机械手能够较好地满足钻杆排放工艺的需求。     

铰接式柔性钻杆的参数化设计

柔性钻杆是超短半径水平井钻井工具的重要组成部分,其结构设计的好坏直接影响钻井工具的工作性能.根据柔性钻杆的强度条件以及与导向筛管的几何关系,得到了满足不同井眼曲率半径的柔性钻杆结构参数;考虑球头柱键与凹槽的接触非线性及柔性钻杆的材料非线性特性,采用有限单元法建立了单节柔性钻杆有限元模型;对不同结构参数的柔性钻杆进行了仿...     

石油钻机提升系统吊环铸钢件内部缺陷解决方案

吊环为石油钻机提升系统关键零部件之一,产品要求按API 8C钻井和采油提升设备规范进行超声探伤检测,质量达到PSL2级标准。从冒口、浇注系统、冷铁等工艺要素入手,利用铸造CAE数值模拟,优化了铸件的工艺方案,解决了吊环铸件存在的疏松缺陷,提高了生产效率。     

双台肩钻杆接头纵向裂纹失效分析

在钻井过程中,曾发生数起双台肩钻杆接头产生纵向裂纹引起的钻井事故。为了查明该钻杆接头纵裂的原因,用宏观和微观形貌观察、化学成分分析、力学性能试验、应力分布有限元模拟等手段对失效接头进行了分析。结果表明,双台肩钻杆接头的结构特点是导致接头失效的主要原因。建议减小接头螺纹锥度以提高接头的抗扭能力,避免失效事故的发生。     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Rheology Feature of Simple Metal Melt

The rheology feature of Sb, Bi melt and alloys was studied using coaxial cylinder high-temperature viscometer. The results showed that the curve of torsion-rotational speed for Sb melt presents a linear relation in all measured temperature ranges, whereas for the Bi melt, the curve presents obvious non-Newtonian feature within the low temperature range and at relative high shear stress. The rheology feature of Sb80Bi20 and Sb20Bi80 alloy melts was well correlated with that of Sb and Bi, respectively. It is considered that the rheology behavior of Sb melt plays a crucial role in Sb80Bi20 alloy and that of Bi melt plays a crucial role in Sb20Bi80 alloy.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.