There are a few out there, mostly US based if you google oil field surplus equipment or something similar.
In the US there's https://oilpatchsurplus.com/
and a few others
In the UK there is HawkEnviro, http://www.hawkenviro.co.uk
and there was an attempt by OGUK to establish something, but it was a bit lacklustre, I don't think it really took off. Problems with the standardisation of naming practices of inventory items being one issue.