They will replace the seal, but if the failure diagnosis is wrong then the same problem will occur again. But by consulting the ESA 'Succesful sealing with elastomers - An interactive guide to diagnose and prevent seal failure' the cause can be identified and a repeat prevented.
Follow the link to use online.
'Just how accurate is Arhenius Life Prediction for elastomeric seals?'
ESA member companies are carrying out a major joint research project to give definitive data on how well users can rely on industry accepted techniques for life prediction of elastomeric seals in oilfield environments. Read more .....
'Low temperature sealing capabilities'
Work has commenced on the development of a completely new performance based test for low temperature elastomeric seals, reflecting the most common application conditions. Read more .....