西南石油大学学报(自然科学版) ›› 2004, Vol. 26 ›› Issue (4): 73-77.DOI: 10.3863/j.issn.1000-2634.2004.04.021

• 石油机械工程及其它 • 上一篇    下一篇

地质勘探钻头失效机理研究

李琴1 金鑫1 谭军1 李国忠1 周锋者2
  

  1. 1.西南石油学院机电学院,四川南充637001; 2.长庆油田勘探局第一采油技术服务处
  • 收稿日期:2003-09-22 修回日期:1900-01-01 出版日期:2004-08-20 发布日期:2004-08-20
  • 通讯作者: 李琴

STUDY OF THE FAILURE MECHANISM OF THE GEOLOGICAL EXPLORATION BIT

LI Qing JIN Xin TAN Gun LI Guo-zhong ZHOU Feng-zhe   

  1. Southwest Petroleum Institute, Chengdu Sichuan 610500, China
  • Received:2003-09-22 Revised:1900-01-01 Online:2004-08-20 Published:2004-08-20
  • Contact: LI Qing

摘要: 结合地质勘探钻头破岩机理对失效的地质勘探钻头本体和合金齿(WC-Co硬质合金)进行了失效分析。通过对钻头本体的失效分析认为冲击端面失效机理为冲击疲劳,花键失效则是严重塑性变形后压溃剥落。通过对合金齿脱落、断裂、磨损三种失效形式的分析认为冲击剥落、磨粒磨损、冲击疲劳和冲击热疲劳等交叠作用是导致合金齿失效的原因,并阐明了形成的机理和主导因素。
   

关键词: 地质勘探钻头, 失效分析, 机理研究

Abstract: The failure analysis of the geological exploration bit body and alloy tooth(WC-Co Cemented carbides)by using scanning electron microscopy was studied. It was concluded that the failure mechanism of the bit body on impact end was the impactfatigue, and the spline failure mode was crushing spalling after severe plastic deformation. Through analyzing the three failure modes (alloy tooth shedding, fracture, wearing), the main reason of alloy tooth failure was overlapping effect of cable spalling, abrasive wear, impact fatigue and impact thermal fatigue.

Key words: failure analysis, cemented carbide tooth, physics exploration bit

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