More providers of Oil Shale
Strata-X Energy -- Canada
Strike Energy Limited -- Australia
Summit Midstream Partners, LP (SMLP) -- United States
Sundance Energy -- United States
Triangle Petroleum Corporation -- United States
U.S. Energy Corp. -- United States
Ultra Petroleum -- United States
Unit Corporation -- United States
Valero Energy Corporation -- United States
Whiting Petroleum Corporation -- United States
Wood Group (now Wood PLC) -- Scotland
WPX Energy -- United States
Xtract Energy Plc -- United Kingdom
ZaZa Energy Corporation -- United States
Samson Oil and Gas -- Australia
