In reply to maria277:
Worked in the industry for 10 years. West and South Africa, mainly onshore.
Your questions can be answered dependant on position and location.
Isolated? Not always.
Work conditions. Desk, phone, business lunches, lots of evening dinner schmoozing. Enjoyable.
Safety. Well, money comes before safety, always. They will pretend otherwise, but safety is a secondary consideration.
Offshore......Pretty crap in the UK. Better abroad.