As a one-time contractor for provision of fixed and rotary aircraft to Shell, in the form of one of its national oil companies managed 100% by Shell, although they did not own 100%, I can add a comment that my experience over 8 years was that they would demand trunkfuls of paper responding to Shell's "safety management" directions, but when operational necessity meant picking up a load (people or freight or both) and carrying it to somewhere else that operational necessity overcame all other considerations, repeat "all".
Perhaps things have improved, but I wonder. Cultures take a lot of eradicating and the oil exploration and extraction industry is not run by people who let caution and "bureaucracy" stand in their way.