Petrobank is an oil exploration, development, and production company based in Calgary, Canada. It operates through 4 units/subsidiaries, [Energy] (58% owned subsidiary) in Canada, Petrominerales Ltd (was 65% owned until December 31, 2010 when both company's parted ways through a reorganization) in Peru and Colombia, HBU (100% owned subsidiary started in 2006) in the heavy crude oil business, and its technology unit Archon Technologies Ltd (THAI and CAPRI).  Wikipedia