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| 改进的静态推靠式旋转导向钻具组合力学模型 |
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史玉才1,滕志想1,白璟2,管志川1,刘庆成3,王恒1,范致斌1
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(1.中国石油大学(华东)石油工程学院,山东青岛 266580;2.中国石油川庆钻探钻采工程技术研究院,四川广汉 618300;3.航天科工惯性技术有限公司,北京 100074)
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| 摘要: |
| 为了提高井眼轨迹调控精度和效率,基于该旋转导向钻井系统的结构及工作原理,应用纵横弯曲梁理论重建下部钻具组合力学模型。其中,考虑导向翼肋与井壁的接触作用,给出导向翼肋等效处理新方法——将导向翼肋等效成偏心距未知、支座反力已知的偏心稳定器,将导向力等于支座反力设为补充求解条件。理论分析与实钻数据表明,给出的导向翼肋等效处理方法更合理,基于该等效方法建立的下部钻具组合力学模型有助于提高井眼轨迹参数预测精度,能够满足钻井要求。 |
| 关键词: 旋转导向钻井系统 静态推靠式 下部钻具组合 力学模型 纵横弯曲连续梁 实例分析 |
| DOI：10.3969/j.issn.1673-5005.2018.05.008 |
| 分类号::TE 122.14 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(51674284)；国家科技重大专项(2016ZX05022-002) |
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| Improved mechanical model of the static push-the-bit rotary steerable bottom-hole assembly |
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SHI Yucai1, TENG Zhixiang1, BAI Jing2, GUAN Zhichuan1, LIU Qingcheng3, WANG Heng1, FAN Zhibin1
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(1.School of Petroleum Engineering in China University of Petroleum(East China), Qingdao 266580, China;2.Drilling ＆ Production Technology Research Institute of PetroChina Chuanqing Drilling Company Limited, Guanghan 618300, China;3.Aerospace Science and Industry Inertial Technology Company Limited, Beijing 100074, China)
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| Abstract: |
| In this study, in order to improve the wellpath control accuracy and efficiency, the bottom-hole assembly (BHA) mechanics model, based on the structure and working principle of the static push-the-bit RSS, was rebuilt by means of the continuous beam-column theory. A new equivalent method of steerable rib was presented, in which the contact interaction between the steerable rib and the wellbore wall was taken into account, considering the steerable rib as an eccentric stabilizer with unknown eccentricity and known supporting force. Accordingly, the complementary solution condition was that the vectorial steerable force was equal to the supporting force. Theoretical and true drilling data analyses have shown that the new equivalent method of the steerable rib was more reasonable than the existing ones. The BHA static mechanical model based on the new equivalent method can increase the prediction accuracy of the wellbore parameters and meet the drilling requirements. |
| Key words: rotary steerable drilling system static push-the-bit bottom-hole assembly mechanical model continuous beam-column theory instance analysis. |
