Delta Petroleum Corp. has emerged from chapter 11 protection under a plan that gives the company a stake in a new joint venture that will continue to explore for natural gas in the Rocky Mountains, Dow Jones DBR Small Cap reported today. The company, which has been renamed Par Petroleum Corp ., said that it has contributed the assets it had pledged to form the joint venture with Laramie Energy II LLC, the sponsor of its reorganization plan. Laramie holds a 66.66 percent stake in the joint venture, named Piceance Energy LLC, while Par holds a 33.34 percent stake.