etienne,
I think you'll find that the new S76 is going to Escravos and will shortly be joined by a second 76C++.
CHC's Brian Clegg is out visiting Nigeria and one of his tasks must be to sort out the problems with the Aero national pilots' strike and stop the steady loss of expat pilots with even more now threatening to leave if something is not done very soon. At least the CHC senior management from Canada do visit Nigeria and probably spend more time in Port Harcourt than the Bristow management from Lagos.
Meanwhile both CHC and Bristow are waiting to find out which company will be awarded the Chevron deepwater contract. Whichever one wins is sure to have quite a problem finding enough pilots to crew it.