By Jack MoneyBusiness writerjmoney@oklahoman.comT. Boone Pickens knew what he was doing when it came to collecting art.His collection, which included works of art spanning more than a century, obtained bids during a virtual auction this week that totaled more than $20.4 million, Christie’s Auction House announced this week.The collection, auction house officials said, included works from Frederic Remington, Thomas Moran and N.C.