Abstract
In a directional well, which is promising for future well construction, a well casing is subjected to bending load due to the deviated well trajectory. Collapse strength of commercial casing under bending has rarely been evaluated, making it impossible to design casing strings for a directional well. The authors performed collapse tests under four-point bending, analyzed the collapse strength as an unstable problem by the elastic-plastic finite-element method (FEM), and established an empirical formula based on Mises' yield criterion. the elastic-plastic FEM is highly applicable, since values calculated by the FEM program agree well with those of experiments. It was found that the bending load has little influence on collapse strength compared with the conventional estimation, and that the proposed empirical formula can well estimate the collapse strength under bending.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
