石油学报 ›› 2023, Vol. 44 ›› Issue (9): 1552-1561,1573.DOI: 10.7623/syxb202309012

• 石油工程 • 上一篇    下一篇

横向主动控斜力作用下底部钻具组合动力学特征

狄勤丰1, 骆大坤1, 周星1, 王文昌1, 陈锋2   

  1. 1. 上海大学力学与工程科学学院 上海 200444;
    2. 上海大学机电工程与自动化学院 上海 200444
  • 收稿日期:2023-03-30 修回日期:2023-07-09 出版日期:2023-09-25 发布日期:2023-10-09
  • 通讯作者: 王文昌,男,1982年5月生,2011年获上海大学工程力学专业博士学位,现为上海大学副教授、硕士生导师,主要从事石油管柱力学方面的研究。Email:wangwenchang1982@163.com
  • 作者简介:狄勤丰,男,1963年8月生,1997年获西南石油学院油气井工程专业博士学位,现为上海大学教授、博士生导师,主要从事石油工程中的力学问题研究。Email:qinfengd@sina.com
  • 基金资助:
    国家自然科学基金石油化工联合基金重点项目"超深井钻柱非线性动力学及动态安全性基础理论研究"(No.U1663205)、国家自然科学基金面上项目"考虑隔水管耦合作用的超深水超深曲井钻柱动力学研究"(No.52174003)和国家自然科学基金青年基金项目"气体钻井中预弯底部钻具组合控斜的非线性动力学机制"(No.51704191)资助。

Analysis of dynamic characteristics of bottom hole assembly under transverse active deviation control force

Di Qinfeng1, Luo Dakun1, Zhou Xing1, Wang Wenchang1, Chen Feng2   

  1. 1. School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China;
    2. School of Mechanical and Electrical Engineering and Automation, Shanghai University, Shanghai 200444, China
  • Received:2023-03-30 Revised:2023-07-09 Online:2023-09-25 Published:2023-10-09

摘要: 垂直钻井工具通过对井壁施加横向主动控斜力实现高效控斜快速钻井,但也使底部钻具组合的动力学特性更加复杂,甚至引起井下复杂振动和钻具失效,因而掌握带垂直钻井工具钻柱的动力学特性十分必要。以Power-V工具为例,首先建立了横向主动控斜力模型,随后基于Hamilton原理,建立了钻柱动力学模型,并利用节点迭代法和Newmark-β方法对存在横向主动控斜力的钻柱动力学特性进行了求解。在验证模型正确性的基础上,以现场实际超深井为例,分析了钻柱形心的涡动轨迹、涡动速度特征。研究结果表明,Power-V的加入,使得靠近垂直钻井工具的钻铤做偏向井眼低边一侧的向前涡动,而且钻铤形心的涡动轨迹呈现椭圆形特征,同时,使钻柱受到较大的井壁反作用力的同时,会使钻柱在钻头、稳定器处也承受较大的横向作用力,进而改变钻柱的运动特征。地面扭矩和井下转速波动较大,底部钻柱的横向振动较剧烈,与井下实测和地面观察结果吻合。实际应用时,应该尽可能采取措施,减少这种振动,提高钻井作业效率。

关键词: 动力学特性, 主动控斜力, 垂钻工具, 钻柱, 节点迭代法

Abstract: The vertical drilling tool can achieve efficient vertical and fast drilling by applying transverse active deviation control force to the borehole wall, but it also makes the dynamic characteristics of BHA more complicated, and even causes complex downhole vibration and drilling tool failure. Therefore, it is necessary to study the dynamic characteristics of drilling string by vertical drilling tool. Taking Power-V tool for example, a model of transverse active deviation control force was established initially, and then a dynamic model of drill string was established based on Hamilton’s principle. Later, the dynamic characteristics of drill string with transverse active deviation control force were solved by node iteration method and Newmark-β method. Based on verifying the accuracy of the models, taking a well for example, the whirl trajectory and whirl speed features of drill string were analyzed. The results show that with the addition of Power-V, the drill collar near the vertical drilling tool is inclined to whirl forward on the low side of the hole, and the whirl trajectory of the drill collar center presents an elliptical shape. Meanwhile, the drill string is subject to a great side force, and there is a strong transverse force exerted on bit and stabilizers installation, thus changing the motion characteristics of drill string. The surface torque and downhole speed fluctuate greatly, and the drill string is subject to severe transverse vibration, which is consistent with the downhole measured results and the ground observation results. In practice, measures should be taken to reduce above vibration and improve the efficiency of drilling operations.

Key words: dynamic characteristic, active deviation control force, vertical drilling tool, drill string, node iteration method

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