Article | Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th ‚Äď 27th, 2017 | Structural Analysis of the Casings in Deep Geothermal Wells
Göm menyn

Title:
Structural Analysis of the Casings in Deep Geothermal Wells
Author:
Gunnar Sk√ļlason Kaldal: Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, Reykjav√≠k, Iceland / √ćSOR ‚Äď Iceland GeoSurvey, Reykjav√≠k, Iceland Magnus Thor Jonsson: Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, Reykjav√≠k, Iceland Halld√≥r P√°lsson: Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, Reykjav√≠k, Iceland Sigr√ļn Nanna Karlsd√≥ttir: Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, Reykjav√≠k, Iceland
DOI:
10.3384/ecp17138391
Download:
Full text (pdf)
Year:
2017
Conference:
Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th ‚Äď 27th, 2017
Issue:
138
Article no.:
052
Pages:
391-398
No. of pages:
8
Publication type:
Abstract and Fulltext
Published:
2017-09-27
ISBN:
978-91-7685-417-4
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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With recent increasing interest in drilling deep geothermal wells in order to produce from higher enthalpy heat sources than before, the strength of the casing becomes one of the most limiting factors. Casing failures include collapse or partial collapse (bulges) and tensile ruptures if wells are allowed to cool down or are killed by pumping water into them. Structural impact of large temperature and pressure changes remains one of the challenges to be solved for utilization of deep geothermal wells. Thermal expansion of materials, degradation of structural properties at elevated temperatures, corrosion and cyclic loads are of particular concern as well as determining how many thermal cycles casings can go through before failure occurs. A nonlinear structural finite-element model of the cased section of high temperature geothermal well is presented and discussed here. The purpose of the model is to evaluate the structural integrity of casings when subjected to large temperature and pressure loads. The model can be used further to evaluate well designs and material selections for deep geothermal wells.

Keywords: Casings, structural analysis, finite-element method, thermal loads, deep drilling

Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th ‚Äď 27th, 2017

Author:
Gunnar Sk√ļlason Kaldal, Magnus Thor Jonsson, Halld√≥r P√°lsson, Sigr√ļn Nanna Karlsd√≥ttir
Title:
Structural Analysis of the Casings in Deep Geothermal Wells
DOI:
http://dx.doi.org/10.3384/ecp17138391
References:
No references available

Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th ‚Äď 27th, 2017

Author:
Gunnar Sk√ļlason Kaldal, Magnus Thor Jonsson, Halld√≥r P√°lsson, Sigr√ļn Nanna Karlsd√≥ttir
Title:
Structural Analysis of the Casings in Deep Geothermal Wells
DOI:
http://dx.doi.org/10.3384/ecp17138391
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