Energy stocks have been among the market’s worst performers, and arguably, that’s put many of the sector’s leading stocks in the stock market’s bargain bin. While crude oil prices might never get back to their past highs, an upward turn could transform Transocean (NYSE: RIG), Dawson Geophysical (NASDAQ: DWSN), and Encana (NYSE: ECA) into profit-friendly investments to buy on sale.