Cold hydraulic expansion of oil well tubulars

Alfred Rotimi Akisanya, Fariq Khan, Wiliam F Deans, Peter Wood

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)
8 Downloads (Pure)


The cold hydraulic expansion of two concentric tubulars is analysed with emphasis on the applications to oil and gas casings. Theories of elasticity and plasticity are used to develop a model relating the hydraulic pressure, the geometric dimensions of the tubulars and the residual contact pressure between the pipes. Nonlinear finite element analysis is used to validate the theoretical results and to investigate the effects of end support conditions. Hydraulic expansion experiments are conducted on tubulars and the measured evolution of the deformation and residual contact pressure are compared with the corresponding theoretical predictions and finite element solutions. There is a good agreement between the experimental results and predictions from the theoretical analysis and numerical simulations. The implications of the results for the design of casing hangers and patch repairs of oil and gas tubulars are discussed.
Original languageEnglish
Pages (from-to)465-472
Number of pages8
JournalInternational Journal of Pressure Vessels and Piping
Issue number11-12
Publication statusPublished - Dec 2011


  • Expandable tubular
  • Hydraulic expansion
  • Thick-walled cylinders
  • Interference
  • Residual stresses


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