Do the Oil and Gas UK and OLF Norwegian Medicals at the same time and you will be eligible to work in most areas of the world.
I also do the FOET + OLF modules every 4 years for my offshore survival.
Being a corrupt world we live in, you will still need to do local medicals if you go on any jobs in Malaysia or China etc…The price Oil Companies pay for being able to bring expat workers into China and Malaysia. Some of these medicals are are a joke and simply money making tick the box exercises, and nothing to worry about.