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工程力学  2012 

石油钻柱的动态安全评价分析方法

DOI: 10.6052/j.issn.1000-4750.2011.04.0231, PP. 375-380

Keywords: 石油钻柱,动力学特性,涡动,动态安全系数,动态应力,有限元法

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Abstract:

在钻柱动力学模型的基础上,运用有限元法仿真模拟钻柱的动力学特性,计算钻柱动态应力,提出了钻柱动态安全判断准则,并计算了单扶正器钻柱和多扶正器钻柱的动态安全系数。结果表明:钻柱涡动特性直接关系到钻柱的动态安全,危险截面主要分布在中和点以下的下部钻具组合部分。合理地调整转盘转速和安放扶正器,可以降低钻柱的动态应力,提高钻柱的动态安全系数。钻柱动态安全系数能够反映钻柱井下运动情况,是衡量钻柱动态安全的重要指标。

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