“The company has been repeatedly stymied by equipment problems, regulatory hurdles, persistent sea ice and legal challenges from Alaska Natives and environmental groups. Shell had hoped to complete as many as four wells in the Arctic this summer. It now expects to begin one or two wells and finish next year.
“Early Sunday, Shell’s Noble Discoverer drill ship sank a bit into the Burger Prospect, about 70 miles off the Alaska coast, the start of a 1,400-foot pilot hole that will form the basis for a mile-deep exploration well.
“But late Monday, Shell announced it was pulling the floating drill rig’s multiple anchors and moving it off the well because of encroaching sea ice. The company said it had based its decision on satellite images, radar and on-site reconnaissance.”
New York Times Green Blog