西南石油大学学报(自然科学版) ›› 2002, Vol. 24 ›› Issue (2): 44-45.DOI: 10.3863/j.issn.1000-2634.2002.02.014

• 石油工程 • 上一篇    下一篇

深井小尺寸套管下入遇阻时最大下放力的确定

刘绘新 李晋
  

  1. (西南石油学院石油工程学院,四川 南充 637001)
  • 收稿日期:2001-08-15 修回日期:1900-01-01 出版日期:2002-04-20 发布日期:2002-04-20
  • 通讯作者: 刘绘新

DETERMINING THE MAXIMUM LOAD IN RUNNING CASING ENCOUNTERED RESISTANCE UNDER DEEP WELL

LIU Hui-xin LI Jin.    

  1. (Southwest Petroleum Institute, Nanchong Sichuan 637001, China)
  • Received:2001-08-15 Revised:1900-01-01 Online:2002-04-20 Published:2002-04-20
  • Contact: LIU Hui-xin

摘要: 深井小尺寸套管下入遇阻时,随着下放力的增加,将产生失稳弯曲。由于弯曲会造成套管与井壁的接触,会造成摩擦力增加,抵消了部分下放力,使作用在卡点处的有效下放力减少。根据经典的管柱弯曲理论和相关实验研究结果,可以建立深井小尺寸套管下入遇阻时最大下放力的计算模型。通过规律分析和实例验证,表明计算模型是比较合理性的,对比结果较吻合,为实际施工中发生下入遇阻情况、实施下压套管措施时,在保证安全有效的前提下,确定最大下放力提供了较合理的参考依据。

关键词: 下套管, 管柱弯曲, 摩阻

Abstract: The bending failure stability accrued with the increase of the running load, when the small size casing, which was run into the wellbore under the deep well, encountered the resis-tance. The casing contacted the wellface and the friction load was increased between the casing and the wellface, because of
the casing bends, counteracted some forces, which caused the running loads to decrease at the contact position. According to the typical drilling pipe bend theory and relative experimental results, the calculating model of the running casing encountered the resistance was established, the model is reasonable and reli-able by the analysis and example verification, it provided the theoretical supports for the maximum load.

Key words: running casing, drilling pipe bending, friction resistance

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