This is the winter of oil's discontents. It is the winter after oil prices whipsawed world markets. A year ago, when oil prices were on their way to all-time highs, wildcatters stampeded North Dakota land offices to search for unclaimed mineral rights in the oil-rich Bakken Formation. In summer, oil boosters slapped bumper stickers on pickups boasting of 'Rockin' the Bakken,' with its 4.3 billion barrels of recoverable oil. Now, with oil trading under $40 a barrel amidst a global recession, oil companies are pulling rigs from frozen farm and grazing land. But a small Twin Cities-based startup has a...