可膨胀波纹管技术在韦15-19井的应用

可膨胀管包括可膨胀实体管和可膨胀波纹管，主要用于在不减小井眼尺寸的情况下封堵各种复杂地层，对损坏套管进行补贴修复，作为各种井筒封隔器以及延长技术套管长度。实体管和波纹管两者膨胀机理不一样，相比之下，可膨胀波纹管技术具有膨胀工艺简单，作业周期短的优点，该技术一直由俄罗斯掌握。中国石化勘探开发研究院经过多年的潜心研究，终于形成了具有自主知识产权的可膨胀波纹管产品及其配套的工艺技术，新研制的可膨胀波纹管壁厚8mm，抗内压强度35MPa，抗外挤强度10MPa，并在江苏油田韦15—19井进行了漏层封堵现场试验，经过扩眼、管串下入、水力膨胀、机械膨胀等工艺后获得圆满成功，标志着我国已经打破了国外公司对该技术的垄断，填补了国内在该领域的技术空白。     

Efficient Solvent-Free Hydrosilylation of Aldehydes and Ketones Catalyzed by Fe2(CO)9/C6H4-o-(NCH2PPh2)2BH

An efficient solvent-free catalyst system for hydrosilylation of aldehydes and ketones was developed based on iron pre-catalyst Fe₂(CO)₉/C₆H₄-o-(NCH₂PPh₂)₂BH. The reactions were tolerant of many functional groups and the corresponding alcohols were isolated in good to excellent yields following basic hydrolysis of the reaction products. The reaction is likely catalyzed by an in situ generated pincer ligated iron hydride complex.

Graphic Abstract

     

磁阻式转速测量系统电磁特性分析及故障处理

磁阻式转速传感器是一种较为常见的转速测量装置。针对某机组给水泵汽轮机在调试过程中出现的由于磁阻式转速测量系统自身电磁特性造成的转速测量故障现象,分析了故障产生的原因,并对故障机理进行了研究,揭示了磁阻式转速测量系统中测量模件的输入电压随其自身电阻、电容以及电动势的交变频率之间的变化规律,在此基础上,提出了具体的处理措施和建议。实际应用表明,测量故障消除,处理效果良好。     

The structural characterization of (NH4)2B10H10 and thermal decomposition studies of (NH4)2B10H10 and (NH4)2B12H12

The structure of (NH₄)₂B₁₀H₁₀ (1) was determined through powder XRD analysis. The thermal decomposition of 1 and (NH₄)₂B₁₂H₁₂ (2) was examined between 20 and 1000 °C using STMBMS methods. Between 200 and 400 °C a mixture of NH₃ and H₂ evolves from both compounds; above 400 °C only H₂ evolves. The dihydrogen bonding interaction in 1 is much stronger than that in 2. The stronger dihydrogen bond in 1 resulted in a significant reduction by up to 60 °C, but with a corresponding 25% decrease in the yield of H₂ in the lower temperature region and a doubling of the yield of NH₃. The decomposition of 1 follows a lower temperature exothermic reaction pathway that yields substantially more NH₃ than the higher temperature endothermic pathway of 2. Heating of 1 at 250 °C resulted in partial conversion of B₁₀H₁₀²⁻ to B₁₂H₁₂²⁻. Both 1 and 2 form an insoluble polymeric material after decomposition. The elements of the reaction network that control the release of H₂ from the B₁₀H₁₀²⁻ can be altered by conducting the experiment under conditions in which pressures of NH₃ and H₂ are either near, or away from, their equilibrium values.     

火电机组风烟系统智能控制模块设计与应用

风烟系统是火电机组的重要组成部分。为提高火电机组智能化水平,对风烟系统智能控制的需求进行了分析,设计了智能启动、智能运行、智能停运3大功能组及多个子功能组。各(子)功能组均采用模块化设计,能适应正常运行、检修和故障等各种工况,紧急情况下手动控制优先。仿真及现场应用表明,在无人工干预的情况下,能实现整个风烟系统启动、运行、停运全过程的自动控制,炉膛压力等重要参数控制平稳,提高了火电机组安全性能,减轻了运行人员劳动强度。     

Vector boundary-element analysis for conical horn

A vector boundary-element method is developed for analyzing a conical horn in this paper. A moving boundary technique (MBT) is proposed for solving difficulties of the integration at high-order singularity points in a vector integral equation, and its validity is verified by calculating the reflection coefficients of an empty circular waveguide with a short-end. The circular symmetry of the conical horn is utilized to simplify the 3-D problem to 2-D one and the analyzing efficiency is significantly improved. A comparison of the reflection coefficients of the conical horn is given between the experimental data and the calculated results. Very good agreement has been seen, and the reliability and efficiency of the present method are thus verified.     

低铅Fe－Pb系中温变换催化剂的研制

在原苏联Ｆｅ－Ｐｈ系ＣＴＫ－ＭЖ型中温变换催化剂的基础上，研制了低铅中温变换催化剂，并与我国Ｆｅ－Ｃｒ系中温变换催化剂的主要性能进行了比较。     

某生物安全实验室节能控制方案

以病毒所科研楼-实验单元为例,介绍了该实验单元内生物安全二级实验室的送、排风系统,在传统楼宇自控基础上采用就地控制方案实现了新节能控制,并详细阐述了运用该方法后实验室的控制方案及达到的节能效果.     

Copper oxide hollow spheres: Synthesis and catalytic application in hydrolytic dehydrogenation of ammonia borane

In this paper, CuO hollow microspheres with different shell thickness and porosity have been synthesized using carbonaceous saccharide microspheres as templates according to a modified literature method. These CuO hollow microspheres were characterized and their catalytic properties in the hydrolytic dehydrogenation of ammonia borane (NH₃BH₃, AB) were examined. A kinetic study indicated that a maximum hydrogen generation rate of 294 mL H₂ min^?1 (g catalyst)^?1 can be achieved at 45 ± 0.2 °C in the present system, which is comparable with that for other reported Cu based catalysts.     

接触焊在大中直径HFW钢管的应用优势与关健技术探讨

为了提高我国大、中直径HFW焊管生产焊接工艺,系统综述了国内外HFW焊管发展现状、制管原理和生产工艺,比较分析了生产制备中感应焊与接触焊在质量、工艺及节电等方面存在的异同,指出了接触焊在大、中直径（406 mm、508 mm和610 mm等）HFW焊管生产中的应用优势,并系统论述了接触焊的关键技术,提出了电极与焊机优选、电极摆动臂调节系统与冷却系统设计等关键技术的突破性解决思路。