Greenpeace activists were suspended from a bridge and in kayaks in the water for more than 40 hours in an effort to block the Fennica icebreaker from traveling to the Transocean Polar Pioneer rig in the Arctic Ocean.
Shell said drilling operations resumed yesterday at 5:00 pm at the "Burger J" prospect in the Chukchi Sea, off the northwest coast of Alaska.
It said work would continue after the 116-meter (380-foot) Fennica icebreaker arrived at the rig.
"We remain committed to operating safely and responsibly and adding to Shell's long history of exploration offshore Alaska."
Fennica set off Thursday after it was blocked by the activists, including those suspended from a bridge in hammock-like devices. Other protesters were stationed on the bridge while some floated in kayaks in the water.
A US judge on Thursday threatened to fine the protesters for every hour they continued to block the Shell icebreaker.
"The 13 #ShellNo climbers have come off the bridge. Now all eyes are on President Obama to save the Arctic," the organization said on Twitter.
In May, Obama authorized oil drilling in the Arctic, a decision that infuriated environmental groups.
