石油学报 ›› 2017, Vol. 38 ›› Issue (3): 348-355.DOI: 10.7623/syxb201703012

• 石油工程 • 上一篇    下一篇

射孔冲击相变对射孔套管抗挤性能的影响

贾曦雨1, 王树山1, 马峰1, 唐凯2, 陈华彬2, 马小强1, 潘德凯1   

  1. 1. 北京理工大学爆炸科学与技术国防重点实验室 北京 100081;
    2. 中国石油集团川庆钻探工程有限公司测井公司 重庆 400021
  • 收稿日期:2016-04-05 修回日期:2017-02-01 出版日期:2017-03-25 发布日期:2017-04-07
  • 通讯作者: 马峰,男,1973年10月生,1995年获北京理工大学学士学位,2000年获北京理工大学博士学位,现为北京理工大学副教授,主要从事爆炸力学和射孔段油套管动态响应研究工作。Email:kang@bit.edu.cn
  • 作者简介:贾曦雨,男,1988年8月生,2011年获北京理工大学学士学位,现为北京理工大学博士研究生,主要从事爆炸力学和射孔段油套管动态响应研究工作。Email:baddoo@126.com

Influence of perforation shock-induced phase transformation on the collapsing strength of perforated casing

Jia Xiyu1, Wang Shushan1, Ma Feng1, Tang Kai2, Chen Huabin2, Ma Xiaoqiang1, Pan Dekai1   

  1. 1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
    2. Well Logging Company, CNPC Chuanqing Drilling Engineering Company Limited, Chongqing 400021, China
  • Received:2016-04-05 Revised:2017-02-01 Online:2017-03-25 Published:2017-04-07

摘要:

油气井套管抗挤毁性能与材料屈服强度关系紧密,聚能射流穿孔过程中可能诱发孔眼附近材料相变从而影响射孔套管抗挤强度。首先对射孔后的P110套管取样,通过扫描电镜观察孔眼附近样本组织成分是否发生变化;然后对无孔眼、机加孔眼和射孔孔眼试件进行静力拉伸试验,对比射流冲击影响下试件抗拉性能的变化;最后通过有限元仿真分析了射孔冲击相变区的存在对套管抗挤性能的影响。研究结果表明,聚能射孔会导致材料组织成分变化而影响材料机械性能;当相变对射孔套管抗挤强度起正向增强作用时幅度有限,起负向削弱作时用射孔套管剩余抗挤强度下降显著。

关键词: 套管, 射孔, 冲击相变, 抗挤强度, 有限元分析

Abstract:

Collapse resistance property of oil and gas well casing is closely associated with material yield strength. Shaped charge jet perforating may induce phase transformation of the materials nearby, thus affecting the collapsing strength of perforated casing. First, by taking samples among the perforated P110 casings, the composition variation of samples in the proximity of perforation was observed using SEM. Second, a static tensile test was conducted on the test pieces with no perforations, machined perforations and jet perforations, so as to compare their performance variations under jet penetration. Finally, the influence of perforating shock-induced phase transformation zone on the casing's collapsing performance was analyzed by finite element simulation method. The study result suggests that shaped charge jet perforation will cause material composition variation and further affect the material's mechanical performance. Phase transformation can enhance the perforated casing's collapsing strength to a limited extent but significantly reduce its residual collapse strength.

Key words: casing, perforation, shock-induced phase transformation, collapse strength, finite element analysis

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