辽河油区深井钻具失效的原因及措施研究

发布时间：2018-05-30 07:04

本文选题：钻具失效 + 共振　；参考：《东北石油大学》2017年硕士论文

【摘要】：辽河油区深井地层岩石硬度大、不均质性强,钻进过程中钻柱纵向振动和扭转振动强烈,钻具组合断裂失效事故发生频繁,钻具失效已经成为阻碍辽河油区深井钻探开发的瓶颈。本文对辽河油区钻具失效分析进行研究,主要分析了钻具失效的类型及影响钻具失效的因素,包括钻具材料选择、地层因素、井眼因素等。同时还对钻具受力上进行了分析,从力学角度对钻柱的失效进行研究,分析井下钻柱失效的力学原因。根据钻具组合力学模型,通过对辽河油区不同井况不同扶正器安放位置和不同钻压转速下的钻具应力分析,给出了合理的下部钻具组合结构以及减缓钻具强度失效和高频应力失效的钻进参数优化结果。对钻具失效预防提供依据,通过使用新型螺纹钻杆及无损检测技术等能够很好的预防钻具的失效问题,对提高该区块钻井速度和经济效益有着重要意义。
[Abstract]:Liaohe oil area deep well formation rock hardness, strong uneven quality, drilling string longitudinal vibration and torsional vibration, drilling tool combination fracture failure accidents occur frequently. The failure of drilling tools has become a bottleneck hindering the development of deep well drilling in Liaohe oil area. In this paper, the failure analysis of drilling tools in Liaohe oil area is studied. The types of failure of drilling tools and the factors affecting the failure of drilling tools are mainly analyzed, including the selection of drilling tool materials, formation factors, borehole factors and so on. At the same time, the stress of drill string is analyzed, the failure of drill string is studied from the point of view of mechanics, and the mechanical reason of drill string failure is analyzed. According to the mechanical model of drilling tool combination, the stress of drilling tool under different centralizer position and different drilling pressure speed in Liaohe oil area was analyzed. The optimization results of drilling parameters for reducing the failure of strength and high frequency stress of drilling tools are given. It is of great significance to improve drilling speed and economic benefit by using new type of threaded drill pipe and nondestructive testing technology to prevent the failure of drilling tool.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE921.2

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