石油套管的壁厚公差对承载能力的影响

石油套管的强度计算是按API标准进行的，它未能反映高强度套管和尺寸公差对抗压溃能力的影响。利用弹塑性力学理论建立理想的石油套管的抗压溃能力计算公式，并考虑套管的壁厚公差对计算公式进行修正。用该方法对受均匀载荷及非均匀载荷作用的套管进行分析，并同有限元计算结果相比，两者十分吻合，说明该方法的有效性。     

薄层隔热保温涂料的研制及应用

常规保温材料的研究以提高孔隙率、提高热阻、降低传导传热性能为主,但其对流传热及辐射传热较难降低。当今以传热机理改进保温材料及保温结构是重要发展方向。文章介绍了一种借鉴国外航天工业用高科技绝热涂层的技术思路,并结合国情研制成功的具有高辐射率的薄层隔热保温涂料,它可弥补常规保温材料的不足。该保温涂料以液态涂料方式存在,干燥后的涂层热阻较大,特别是热反射率高,可有效地降低辐射传热,施工方便,涂层薄,无接缝,附着力好,集防水隔热外护于一体。绝热等级为R21.1,热反射度0.79,热辐射率0.83,固含量54％,性能接近国外同类产品水平,成本仅为国外产品的1/4左右。可直接以涂层方式使用,也可与其他多孔保温材料复合构成低辐射传热结构,作为石油石化行业成品油罐及储罐的隔热保温、管道及设备的保冷及屋面隔热保温涂层使用,综合节能效益高。     

复杂连通区域扫描线填充算法的问题及改进

针对复杂连通区域扫描线填充算法可能出现的重复填充错误，分析了产生错误的原因，并给出了相应的改进办法．从而实现了复杂连通区域的快速正确填充。     

水平管路清管过程流动参数变化规律模拟研究

混输管路清管技术的研究对混输管道的运行管理具有非常重要的意义。在分析清管器清管物理模型的基础上 ,建立清管器的特征参数计算模型、动态数学模型和数值计算方法 ,并进行数值模拟 ,计算出测压点压力随时间变化的数据 ,并把它们与试验数据进行比较 ,得到清管过程中压力的变化规律。通过数学模拟 ,可以计算清管过程中管道的压力分布状况 ,利用压力分布状况就可跟踪清管球在管道内的运行情况     

带肋钢筋套筒挤压连接的质量控制

针对太原可口可乐综合厂房主筋采用φ28、φ32三级钢存在的可焊性差的问题，提出了在施工中采用套筒挤压连接的方式，并对该方法的操作要点及质量控制措施进行了总结。     

孤东油田稠油开采配套技术及应用

孤东稠油油藏具有油层埋藏浅，泥质粘土含理高，油层岩石胶结疏松等特点，粘度分布范围宽，开采过程中出砂严重，断块分布零散，开采难度大，结合稠油油藏特点和开采中存在的难点，综合配套油层保护，防砂，降粘和机采等工艺，提高稠开发效果。     

亚齐示范屋与生态技术

亚齐示范屋是在传承印度尼西亚当地住宅传统的基础上，海啸灾区重建的示范性建筑。从当地传统的传承、设计理念及生态技术方面对该示范屋进行了分析、研究，结合我国的情况得出我国生态建筑的发展策略。     

Influence of strain rate on interpass softening

Most laboratory simulations of hot rolling involve a scaling down of the strain rate from the much higher industrial levels. This leads to slower softening between each rolling pass, for which corrections must be made. In the present work, torsion testing simulations of “warm” rod rolling were conducted on a Ti-Nb interstitial-free (IF) steel at 840 °C and 770 °C(i.e., in the ferrite range). For this purpose, “strain rate corrected” interpass times were used, in addition to the more familiar corrections for the stress. The results are compared with those obtained from simulations using uncorrected industrial interpass times. At 840 °C, simulations using corrected interpass times led to high levels of softening between the stages of rolling, thus triggering the reinitiation of cycles of dynamic recrystallization. The initially high stress level at the start of these cycles was responsible for the large differences in the pass-to-pass mean flow stress behavior, compared with that observed when using uncorrected industrial interpass times, or continuous deformations. The differences were much less pronounced at 770 °C, where the rate of softening is much slower than at 840 °C. Predictions for softening based on the Avrami equation underestimated the softening observed using the continuous and uncorrected industrial interpass time schedules and overestimated it for the corrected ones. The former is due to the occurrence of recovery, which is not addressed by the Avrami relation, while the latter is due to the precipitation that takes place during the corrected (longer) interpass times. It was also found that simulations using continuous deformations are applicable only if the interpass softening that would be expected using the corrected interpass times does not exceed about 20 pct.     

气控盘式辅助刹车在车载钻机中的应用分析

在对比分析了传统辅助水刹车与气控盘式辅助刹车的特性后,重点对气控盘式辅助刹车进行了数学分析,得到了该辅助刹车的制动扭矩取决于施加的气体压力,与钻具质量无关,冷却液的流量应同钻柱质量保持正比关系,可精确控制下钻速度并易于实现自动送钻功能。得出了气控盘式辅助刹车更适用于车载钻机的结论。