中国物理B ›› 2020, Vol. 29 ›› Issue (10): 104602-.doi: 10.1088/1674-1056/abab6e

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Hui-Juan Guo(郭慧娟)1,2, Ying-Hua Liu(刘应华)1, Yi-Nao Su(苏义脑)2, Quan-Li Zhang(张全立)2, Guo-Dong Zhan(詹国栋)3,†()   

  • 收稿日期:2020-03-27 修回日期:2020-05-10 接受日期:2020-08-01 出版日期:2020-10-05 发布日期:2020-10-05
  • 通讯作者: Guo-Dong Zhan(詹国栋)

Multi-scale elastoplastic mechanical model and microstructure damage analysis of solid expandable tubular

Hui-Juan Guo(郭慧娟)1,2, Ying-Hua Liu(刘应华)1, Yi-Nao Su(苏义脑)2, Quan-Li Zhang(张全立)2, and Guo-Dong Zhan(詹国栋)3,†   

  1. 1 Department of Engineering Mechanics, AML, Tsinghua University, Beijing 100084, China
    2 Drilling Mechanical Department, CNPC Engineering Technology R & D Company Limited, Beijing 102206, China
    3 Drilling Technology Division, EXPEC Advanced Research Center, Saudi Arabia
  • Received:2020-03-27 Revised:2020-05-10 Accepted:2020-08-01 Online:2020-10-05 Published:2020-10-05
  • Contact: Corresponding author. E-mail: guodong.zhan@aramco.com
  • About author:
    †Corresponding author. E-mail: guodong.zhan@aramco.com
    * Project supported by the National Major Science & Technology Project of China (Grant No. 2016ZX05020-003).

Abstract:

We present an in-depth study of the failure phenomenon of solid expandable tubular (SET) due to large expansion ratio in open holes of deep and ultra-deep wells. By examining the post-expansion SET, lots of microcracks are found on the inner surface of SET. Their morphology and parameters such as length and depth are investigated by use of metallographic microscope and scanning electron microscope (SEM). In addition, the Voronoi cell technique is adopted to characterize the multi-phase material microstructure of the SET. By using the anisotropic elastoplastic material constitutive model and macro/microscopic multi-dimensional cross-scale coupled boundary conditions, a sophisticated and multi-scale finite element model (FEM) of the SET is built successfully to simulate the material microstructure damage for different expansion ratios. The microcrack initiation and growth is simulated, and the structural integrity of the SET is discussed. It is concluded that this multi-scale finite element modeling method could effectively predict the elastoplastic deformation and the microscopic damage initiation and evolution of the SET. It is of great significance as a theoretical analysis tool to optimize the selection of appropriate tubular materials and it could be also used to substantially reduce costly failures of expandable tubulars in the field. This numerical analysis is not only beneficial for understanding the damage process of tubular materials but also effectively guides the engineering application of the SET technology.

Key words: solid expandable tubular (SET), material microstructure damage, multi-scale elastoplastic model, virtual failure

中图分类号:  (Fracture mechanics, fatigue and cracks)

  • 46.50.+a
81.40.Np (Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure) 89.30.aj (Oil, petroleum) 91.60.Ed (Crystal structure and defects, microstructure)