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底部钻具组合动力学特性模拟试验方法研究

ISSN号：1001-4578
期刊名称：石油机械
时间：2013.4.10
页码：6-10
分类：TE921[石油与天然气工程—石油机械设备]
作者机构：[1]中国石油大学(北京)石油工程教育部重点实验室, [2]油气资源与探测国家重点实验室
相关基金：国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”（51221003）;国家973计划项目“深井复杂地层破岩机理与高效破岩方法”（2010CB226703）.
相关项目：复杂油气井钻井与完井基础研究

关键词：底部钻具组合, 相似理论, 动力学特性, 模拟试验, 模拟井筒, BHA , similarity theory , dynamic property , simulation test , simulation shaft

中文摘要：

为了对底部钻具组合（BHA）的动力学特性进行研究，以BHA的运动微分方程为基础，应用相似理论得出了模拟试验参数与现场参数之间的对应关系，设计并建造了BHA动力学特性模拟的试验装置，设计了模拟井筒和模拟BHA，同时考虑了它们之间的摩擦作用，通过模拟试验研究了钻压、钻速、井斜角、稳定器外径及钻柱与井筒之间的摩擦作用对钻头侧向力、转角及运动规律的影响。最后指出，钻井液与钻柱的非线性流固耦合作用对钻柱力学行为有很大的影响，单纯的理论分析仍显不足，有必要通过模拟试验进行深入研究。

英文摘要：

To conduct research on the dynamic properties of bottomhole assembly （ BHA）, the corresponding relation between simulation test parameters and field parameters was obtained applying similarity theory on the basis of the BHA differential equation of motion. The simulation test device of BHA dynamic properties was designed and produced. The simulation shaft and BHA were designed. Meanwhile, the friction between them was considered. Through the simulation test the effects of WOB, penetration rate, hole deviation angle, stabilizer＇ s outer diameter and friction between drillpipe and shaft on drilling bit＇ s lateral force, rotation angle and motion law were studied. Finally, it is pointed out that the effect of the nonlinear fluid-solid coupling effect of drilling fluid and drillpipe on the mechanical behavior of drillpipe is remarkable. Only theoretical analysis is not sufficient and it is necessary to make further study through simulation test.