In ‘84 I was on an exploratory well in the Beaufort Sea, (50 miles off Milne Point in Prudhoe Bay area,) It was drilled from a man-made island. (Mukluk Island)
It was and still is the most expensive well ever drilled. (1.7 Billion $) It was a dry hole. It broke Diamond Shamrock and hurt Exxon so badly, they sold out their interest on the North Slope to Standard Oil. (SAPC)
There is some directional drilling and concrete floater drilling near the shore line, but most of the oil is inland.
The difficulty to drill offshore there, mainly because of the pack ice, will put a halt to any optimism or effort.
But if the ice at the North Pole melts then would it be doable?