this website contains important information and answers to common questions you have about the merger about the merger with bhp billiton petrohawk is now part of bhp billiton read more about owner relations with bhp billiton bhp billiton acquired petrohawk in august 2011 . this acquisition will not affect your relationship with the owner relations function of our company.our contact information and revenue check jib processes remain the same . read more shareholder and debt investor information for the latest investor relations information including for bondholders . shareholder information 2012 bhp billiton