The biggest oil-industry downturn in a generation has companies collaborating in ways they never thought possible. In this global effort, one of the world’s most expensive oil regions intends to lead the way. Last month companies operating in the North Sea started pooling spare parts and tools, and they are even sharing plans on how to drill wells so they can work faster and cheaper, said Paul Goodfellow, Royal Dutch Shell Plc’s vice president for the U.K. and Ireland. This is a big change from oil’s boom, when costs weren’t such an issue as long as $100-a-barrel crude kept flowing. As companies focus on adapting to prices closer to $50 by making their spending less wasteful, they also aim to boost profitability for years to come by keeping costs low as markets recover. “We didn’t particularly focus with the same urgency on costs when oil and gas prices were […]