西南石油大学学报(自然科学版) ›› 2006, Vol. 28 ›› Issue (4): 85-89.DOI: 10.3863/j.issn.1000-2634.2006.04.023

• 石油机械工程及其它 • 上一篇    下一篇

考虑接头的钻柱摩阻扭矩分析

易浩 唐波 练章华 孟英峰   

  1. “油气藏地质及开发工程”国家重点实验室·西南石油大学,四川成都610500
  • 收稿日期:2005-05-08 修回日期:1900-01-01 出版日期:2006-08-20 发布日期:2006-08-20

ANALYSIS OF DRAG AND TORQUE OF DRILLING STRING W ITH CONNECTORS

YI Hao TANG Bo LIAN Zhang-hua et al   

  1. Southwest Petroleum Institute, Chengdu Sichuan 610500, China
  • Received:2005-05-08 Revised:1900-01-01 Online:2006-08-20 Published:2006-08-20

摘要: 钻柱接头的直径大于管体直径,在通常情况下钻柱与井壁间的接触发生在接头上。建立考虑接头钻柱的力学模型,并用迭代法进行求解,成功地分析了考虑接头钻柱在钻进、起钻、下钻、空转及倒划眼时与井壁的接触力、摩阻扭矩,并能预测各接头处接触力的大小、方向。通过与现场试验数据相比较,对钩载的预测误差小于5%,对扭矩的预测误差小于7%。该模型为预测钻柱摩阻扭矩提供了一个快捷准确的方法。
      

关键词: 钻柱, 钻杆接头, 摩阻扭矩, 分析

Abstract: The diameter of connector usually is bigger than that of drilling string. Under normal conditions, the body of drilling string was not contact with the hole/casing. The mechanical model of drilling stringwith connectorswas setup in the paper, and was analyzed by iterationmethod for drag and torque during
drilling, pulling out, going down and back reaming. Themodel can predict themagnitude and direction of contact force at every connector. Compared the calculated datawith the field data, the errors of the hook load was less than 5% and that of torque was less than 7%. Thismodel offered a simple and effectivemethod for predicting the drag and torque of drilling string.

Key words: drilling string, connector, drag and torque, analysis

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