Elastomer seal with frictional contact - Analytical solution

Moosa S M Al-Kharusi, Sayyad Zahid Qamar, Tasneem Pervez, Maaz Akhtar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Main motivation for this work is the need for performance evaluation of swelling (and inert) elastomer seals used in petroleum applications. Closed-form (analytical) solutions are derived for sealing pressure distribution along the elastomer seal as a function of material properties of the elastomer, seal geometry and dimensions, seal compression, and differential fluid pressure acting on the seal ends. Seal performance is also modeled and simulated numerically. Good agreement between analytical and numerical results gives confidence that the analytical solution can be used for reliable prediction of sealing behavior of the elastomer. Detailed investigation is then carried out to find out the effect of variation in seal design parameters on seal performance. For both analytical and numerical models, properties of the seal material at various stages of swelling are needed. Therefore, a series of experiments were also designed and conducted to study the effect of swelling on mechanical properties (E, G, K, and v) of the sealing material. One major finding is that sealing pressure distribution along the seal is not constant but varies nonlinearly depending on seal parameters and loading conditions, with maximum sealing pressure occurring at the center of the seal length. Longer seals are not necessarily better; after a certain seal length, sealing pressure reaches a steady value for a given set of field conditions. As expected, higher seal compression gives higher sealing pressure. Seal compression can be increased either by tubular expansion or by selecting an elastomer that swells more, or a combination of the two. Experimental evaluation of swelling-elastomer seal performance can be very costly, and is not even possible in many cases. Numerical simulations, if validated, can be more convenient, but computational effort and cost can be high as simulations have to be run for each set of conditions. Analytical approach presented here not only gives an elegant closed-form solution, but can give reasonably accurate and much faster prediction of elastomer performance under various actual oil and gas field conditions.

Original languageEnglish
Title of host publicationASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume9
ISBN (Print)9780791856383
DOIs
Publication statusPublished - 2013
EventASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013 - San Diego, CA, United States
Duration: Nov 15 2013Nov 21 2013

Other

OtherASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013
CountryUnited States
CitySan Diego, CA
Period11/15/1311/21/13

Fingerprint

Elastomers
Seals
Sealing (closing)
Swelling
Pressure distribution
Sealants
Numerical models
Analytical models
Materials properties

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Al-Kharusi, M. S. M., Qamar, S. Z., Pervez, T., & Akhtar, M. (2013). Elastomer seal with frictional contact - Analytical solution. In ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) (Vol. 9). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2013-64348

Elastomer seal with frictional contact - Analytical solution. / Al-Kharusi, Moosa S M; Qamar, Sayyad Zahid; Pervez, Tasneem; Akhtar, Maaz.

ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). Vol. 9 American Society of Mechanical Engineers (ASME), 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Al-Kharusi, MSM, Qamar, SZ, Pervez, T & Akhtar, M 2013, Elastomer seal with frictional contact - Analytical solution. in ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). vol. 9, American Society of Mechanical Engineers (ASME), ASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013, San Diego, CA, United States, 11/15/13. https://doi.org/10.1115/IMECE2013-64348
Al-Kharusi MSM, Qamar SZ, Pervez T, Akhtar M. Elastomer seal with frictional contact - Analytical solution. In ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). Vol. 9. American Society of Mechanical Engineers (ASME). 2013 https://doi.org/10.1115/IMECE2013-64348
Al-Kharusi, Moosa S M ; Qamar, Sayyad Zahid ; Pervez, Tasneem ; Akhtar, Maaz. / Elastomer seal with frictional contact - Analytical solution. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). Vol. 9 American Society of Mechanical Engineers (ASME), 2013.
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