关于中国石油钻井业务转变发展方式的几点思考

国内外钻井业务市场发展环境的变化,对中国石油天然气集团公司钻井业务提出了更高的要求。为加快中国石油钻井业务转变发展方式,提高效率效益,作者利用DEA方法对中国石油钻井业务效率进行了分析与评价,并通过SWOT分析了面临的机遇与挑战、优势与劣势。在此基础之上,对中国石油钻井业务如何转变发展方式提出了意见和建议。     

在地质灾害勘察中钻探设备最佳更新期的确定

介绍了地质勘察企业中钻探设备的选型和磨损问题,探讨了设备的经济寿命及提前更新的经济原则,通过实际案例,从设备的静态模式与动态模式两个方面分析了如何确定设备的最佳更新期,对地质勘察企业具有重要意义.     

跟管钻具在复杂山地钻井中的应用

在地质条件不稳定的岩土层山地钻井,容易出现塌井。通过为山地钻机配备跟管钻具,有效地解决了这一问题。本文介绍了跟管钻具的工作原理和特点,并进行了试验,取得了良好的实验效果。     

SH2007型内热式直立炭化炉的研发设计

介绍SH2007型内热式直立炭化炉的炉体结构、主要参数、工艺流程、配套的煤气净化工艺，阐述了设计中采取的环境保护措施。     

Maximum temperature of smoke beneath ceiling in tunnel fire with vertical shafts

To assess the impact of heat smoke in tunnel with vertical shafts, the maximum temperature of smoke beneath ceiling is researched theoretically and experimentally in this paper. A theoretical prediction model for maximum temperature of smoke beneath ceiling is built using dimensional analysis. A numerical model is built and calibrated with the full-scale experiment data. The calibrated numerical model is used to simulate the maximum temperature of smoke under different conditions with different shaft geometry. At last, the proposed theoretical model was formulated and compared with Kurioka model, experimental data and simulation data. The results show that the proposed theoretical model can give a better prediction for the tendency. It can be used to predict the maximum temperature of smoke beneath ceiling of tunnel with vertical shafts by taking the shaft geometry and arrangements effect into account.     

上海世博会中国馆国家馆结构设计与研究

2010年上海世博会中国馆的国家馆造型独特,其底部架空,展区部分层叠出挑,呈四棱台斗冠状。屋面由混凝土筒体出挑34.75m,不但使得竖向质量分布不均匀,还使得楼盖的转动惯量大,导致结构的扭转周期成为第一周期。介绍了国家馆的结构体系、结构布置、结构分析以及主要的构造加强措施。利用楼、电梯间设置四个落地的混凝土筒体作为承重和抗侧力结构,利用建筑的倒梯形造型设置斜柱来支承楼盖大跨度钢梁,在确保结构安全的前提下,最大限度地满足了建筑使用功能的要求。分析了扭转周期为第一自振周期对结构的影响以及底部挑空对结构竖向侧向刚度分布的影响。详细的计算分析及模拟振动台试验结果表明,虽然扭转周期为第一周期,但结构的扭转反应并不严重,对结构的抗震性能影响不大,结构具有良好的抗震性能,可达到预定的抗震性能目标。     

Firm Partial Modularity and Performance in the Electronic Manufacturing Services Industry

Firms continue to develop new ways to decentralize non-core activities to outside parties. Scholars have approached this issue with modularity theory, suggesting a continuum of arrangements ranging from hierarchy to market. Hierarchy relies on fiat, while partially modular forms, those forms between hierarchy and market, require greater coordination, communication and relationships between firms than do fully modular (or market) forms. While modularity theory identifies this continuum, the associated empirical literature tends to dichotomize modularity: firms are either modular or they are not. Nor does the empirical literature examine the performance outcomes of modular arrangements within this continuum. By examining firms that vary between full integration and partial modularity with a continuous modularity measure, this paper empirically examines the performance outcomes associated with a range of modularity levels. We derive this measure from a peculiar inventory option available within the electronic manufacturing services (EMS) industry. Our data include observations on 260 firms over five years. We find that more firms rely on partially modular arrangements, the lower their performance. We suggest explanations for this result, and areas of future research meant to pursue it.     

钻孔灌注桩施工质量控制若干问题的探讨

桥梁钻孔灌注桩桩身质量存在的问题是相当严重的，一旦桩身发生严重缺陷就很难采取补救措施。本文提出以预防为主的思想，加强质量管理，改进施工操作工艺，提高钻孔灌注桩的质量。     

高抽走向钻孔治理瓦斯的应用

介绍东山煤矿三水平下五采3#上层高瓦斯采区,瓦斯涌出量大,上转角及回风瓦斯超限等问题,采用高位钻孔、仰角钻孔进行瓦斯抽放,并对有关参数进行研究,确定前后钻孔的最佳重合距离、最佳钻孔参数,解决了上转角和回风的瓦斯超限问题。     

我国海上油田钻井完井投资测算方法研究

本文分析了我国海上油田钻井完井投资测算的现有方法,针对存在的问题和不足,从内生变量的选择、相关系数、变量的影响程度等方面进行分析研究,提出以作业周期、井深、水深三个因素进行测算的新方法。