LowNSlow
I think you will find that the S76 has not been grounded by any aviation authority, but by the operator as a safety precaution.
I believe that if you were to look in the hangar you will find that there are two Bell 212 helicopters (not one 412), configured to a very high safety spec, including IHUMS (CV/FDR), external liferaft. etc etc. These should be more than enough to service several rigs.