Petrojack
 Petrojack is a Norwegian offshore drilling rig operator. The company has two jackup rigs under order from Jurong Shipyard in Singapore while it sold its two former rigs Petrojack I and Petrojack III to Maersk Drilling. The company was founded in 2004 and listed on the Oslo Stock Exchange the next year. The largest shareholders are Petrolia Drilling (40%) Awilco Offshore (18%) and Sinvest (18%).