叶片形状对岩屑床清除工具作用效果的影响规律

发布时间：2018-02-26 06:30

本文关键词： 岩屑床水平井叶片多相流数值模拟　出处：《断块油气田》2017年01期 　论文类型：期刊论文

【摘要】：近年来出现的多种不同结构形状的岩屑床清除工具,能有效提高复杂井的岩屑清除效率,弥补传统岩屑清除方法的不足。现有研究对不同类型岩屑床清除工具作用机理的认识并不完全,制约了其进一步的开发与应用。为了分析不同叶片形状对岩屑床清除工具作用效果的影响规律,采用CFD(计算流体动力学)软件,对3种形状(螺旋形叶片、V形叶片、直棱形叶片)的岩屑床清除工具环空流场的流动特性进行了仿真模拟。结果表明:3种工具都有助于岩屑床的破坏和岩屑在环空中的运移,但不同岩屑床清除工具在井筒流场的压力、速度、涡流特征、岩屑分布方面具有各自的作用特点;在岩屑床清除效果方面,螺旋形和V形岩屑床清除工具强于直棱形。这些都为工具的使用选型和研制优化提供了重要的参考价值。
[Abstract]:In recent years, a variety of cuttings bed removal tools with different structural shapes have emerged, which can effectively improve the efficiency of cuttings removal in complex wells. In order to make up for the deficiency of traditional cuttings removal methods, the existing researches do not fully understand the mechanism of different types of cuttings bed removal tools. In order to analyze the influence of different blade shapes on the effect of cutting-bed cleaning tools, three kinds of shapes (spiral blades and V-shaped blades) were studied by using CFDsoftware. The flow characteristics of the annular flow field in the annulus are simulated. The results show that all the three tools are helpful to the destruction of the cuttings bed and the movement of the cuttings in the annulus. However, different cuttings bed removal tools have their own characteristics in pressure, velocity, eddy current characteristics and cuttings distribution in wellbore flow field. Spiral and V-shaped cuttings bed removal tools are better than straight prism, which provide an important reference value for tool selection and development optimization.
【作者单位】：中国石油勘探开发研究院研究生部;中国石油集团钻井工程技术研究院;
【基金】：国家科技重大专项课题“工厂化钻井关键技术、装备研究及应用”(2016ZX05022-001)
【分类号】：TE927

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