The Largest Mobile Drilling Rig in the US Collapsed in Alaska (3 photos + 1 video)
Fortunately, no one was killed in the fall of the 4,500-ton colossus. 
A serious oil refining accident has occurred in Alaska. The continent's largest onshore oil rig, the Doyon 26, designed for drilling over extremely long distances in harsh Arctic conditions, collapsed while being moved.
The incident reportedly occurred on January 23 on Alaska's North Slope near the Alpine field. The rig, nicknamed "The Beast," capsized and caught fire. Fortunately, no workers were seriously injured, nor was the surrounding area harmed.
"There was a small fire, but so far the environmental damage is minimal and has not impacted oil infrastructure or facilities. Crews are working on plans to recover the platform, and we will learn more as they are assessed," said Governor Mike Dunleavy.
Media reports indicate that the drilling rig, which weighs a whopping 4,500 tons, was transported to Alaska in sections by 270 tractors. This mobile oil rig, a collaboration between Doyon Drilling and ConocoPhillips, is unique in its ability to drill horizontal wells over 40,000 feet (over 12 km) long. The rig runs on diesel fuel and natural gas.
Specialists from Doyon Drilling have arrived at the accident site. After assessing the rig's condition, they will plan the safe removal and disposal of the debris from the collapsed platform. The cause of the accident has not yet been announced.
