They were taken off the Beatrice Alpha platform by Coastguard helicopters from Stornoway and Sumburgh after it suffered a loss of power shortly after 22:00 on Thursday.
Twenty personnel remained on board the installation, which is 15 miles off the Sutherland coast.
Beatrice Alpha is owned by Talisman, and operated by Wood Group.
Seventeen oil workers were flown off a Moray Firth platform after a power failure.