Actually, Shell did have a drilling rig run aground in Kodiak. It was big news up here for quite a while.
search "Shell oil rig crash Alaska" there are tons of articles.
To the OP. At this very moment ERA, Erickson, Pathfinder, and the odd Maritime and Soloy machine are up here. Of those, ERA is really the only one poised to provide services to Shell. At the moment ERA is bleeding Oil/Gas contracts in Alaska. Rumors have it that this is by design. (This is how Erickson is up here operating 3 B212) However, everything I have heard from people in the North Slope Borough indicate that the new region of interest is farther to the west toward Barrow. If this is indeed the case, I'm sure Shell could choose whichever provider they want since no one will have competitive advantage from established infrastructure.