I'm a mechanical service engineer for a petro-chemical company called National Oilwell Varco, drop them a cv to recruit@nov.com they have a website www.nov.com if you want to look for more information.

Your wage is dependent on what and where you work but you are expected to work around 180 days per year, travel worldwide working on oilrigs and land based installations etc on an ad hoc (on call) basis, you'll be looking to earn in the region of £50-80k.