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| 大斜度井眼中钻柱运动特性模拟试验 |
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温欣, 管志川, 邵冬冬, 周英操1,2,3,4
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1. 中国石油钻井工程技术研究院, 北京 102206;2. 中国石油勘探开发研究院, 北京 100083;3. 中国石油大学石油工程学院, 山东青岛 266580;4. 中国石化华东石油工程有限公司, 江苏扬州 225261
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| 摘要: |
| 基于相似原理建造钻柱动力学室内模拟试验装置，根据试验数据还原钻柱的实际运动轨迹，并从横向振动、加速度和偏移量等方面对钻柱的运动状态进行定量评价。结果表明：转速是影响钻柱运动特性的决定性因素，低转速时钻柱横向振动频率等于钻柱自转频率，钻柱平均加速度线性增加；高转速时横向振动频率增加为自转频率的两倍，平均加速度发生跃升；钻压对钻柱运动特性影响并不显著；井斜角对钻柱的横向振动幅度和频率均无明显影响，但钻柱的横向偏移量随着井斜角的增大而增加；为了避免钻柱的剧烈振动，实际钻进过程中转速应小于69.4 r/min。 |
| 关键词: 钻井 大斜度井 钻柱运动特性 横向振动 加速度 偏移量 |
| DOI：10.3969/j.issn.1673-5005.2018.02.009 |
| 分类号:TE21 |
| 基金项目:国家"973"发展计划项目（2015CB251206）；"十三五"国家科技重大专项（2016ZX05022-002） |
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| Experimental study of dynamic characteristics of drillstring in highly deviated well |
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WEN Xin, GUAN Zhichuan, SHAO Dongdong, ZHOU Yingcao1,2,3,4
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1. Drilling Research Institute, PetroChina, Beijing 102206, China;2. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;3. School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China;4. Oilfield Service Huadong Corporation, SINOPEC, Yangzhou 225261, China
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| Abstract: |
| In order to investigate the dynamic characteristics of drillstring in highly deviated wells, a drillstring dynamics simulation equipment was built based on the similarity theory. The actual trajectory of the drillstring movement in the simulated wellbore was plotted based on the experimental results, and the dynamic characteristics of the drillstring were quantitatively evaluated in terms of lateral vibration, acceleration and trajectory offset. The results indicate that the rotary speed of the drillstring is the dominating factor for its dynamic characteristics. When the rotary speed is low, the lateral vibration frequency is equal to the rotation frequency of the drillstring and the average acceleration increases linearly. When the rotary speed is high, the lateral vibration frequency doubles and a rapid increase of the average acceleration can occur. In addition, weight on bit has no significant influence on the dynamic characteristics of the drillstring. Moreover, with the increase of the inclination angle of the wellbore, the vibration amplitude and frequency of the drillstring can remain stable, whereas its trajectory offset increases. In order to avoid severe vibration, the rotary speed should be less than 69.4 r/min during drilling operations. |
| Key words: drilling highly deviated well drillstring dynamic characteristic lateral vibration acceleration trajectory offset |
