Study on lateral vibration characteristics of BHA with double-span drill collar

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-05-28 DOI:10.1177/16878132241245351

Zuwen Tao, Yingfeng Meng, Xiao Huang, Kang Yang, Guilin Xiao, Ming Xu, Seng Liu, Pan Fang

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引用次数: 0

Abstract

The severe vibration of BHA directly affect the drilling efficiency, borehole trajectory, and wellbore quality. Therefore, it is crucial for developing dynamic mechanics of drill string system by studying the mechanical behavior of BHA. In this paper, considering the continuity condition of double-span drill collar, the expression of lateral vibration of drill collars is firstly obtained by using the assumption mode method. Then, the lateral vibration equation of double-span drill collar is derived by Lagrange equation. Finally, a self-programming model is established based on dynamic mechanics of drill string system, the lateral vibration characteristics of double-span drill collar in four different types of BHA is further determined by the fourth-order Runge-Kutta algorithm. It is obviously found that the lateral vibration is enhanced with increasing the length of drill collar; the rotation speed of BHA, weight on bit (WOB), and the size of stabilizer have a significant influence on the lateral vibration of drill collar. In the practical application, the lengths of the first-span and the second-span drill collar are given as 10 and 19 m, respectively; and the stabilizer diameter approached to bit diameter is recommend in practical gas drilling engineering; under WOB of 10–40 kN, the rotation speed of the drilling string should be controlled nearby 60 r/min. The theoretical investigation is a guidance for structure design of BHA and optimization of drilling parameter.

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双跨钻铤 BHA 横向振动特性研究

BHA 的剧烈振动直接影响钻井效率、井眼轨迹和井筒质量。因此，研究 BHA 的力学行为对钻柱系统动态力学的发展至关重要。本文考虑了双跨钻铤的连续性条件，首先利用假设模态法得到了钻铤横向振动的表达式。然后，通过拉格朗日方程推导出双跨钻铤横向振动方程。最后，基于钻柱系统动力力学建立自编程模型，利用四阶 Runge-Kutta 算法进一步确定四种不同类型 BHA 中双跨钻铤的横向振动特性。结果表明，随着钻铤长度的增加，横向振动增强；BHA 的转速、钻头重量（WOB）和稳定器的尺寸对钻铤的横向振动有显著影响。在实际应用中，第一跨和第二跨钻铤的长度分别为 10 米和 19 米，稳定器直径接近钻头直径是实际天然气钻井工程中的推荐值；在 WOB 为 10-40 kN 的情况下，钻柱转速应控制在 60 r/min 附近。理论研究为 BHA 结构设计和钻井参数优化提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Mechanical Engineering Engineering-Mechanical Engineering

自引率

4.80%

发文量

353

期刊介绍： Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering