| Name | Title | Contact Details |
|---|
Cook Drilling Corp is a Feasterville Trevose, PA-based company in the Energy and Utilities sector.
Tripower Resources Inc is a Ardmore, OK-based company in the Energy and Utilities sector.
Harper Oil Co. is a Springfield, IL-based company in the Energy and Utilities sector.
Tesco Corporation is an oilfield services company specializing in the design, manufacture and service of technology-based solutions for the upstream energy industry.
Marathon Oil Corporation (NYSE: MRO) is an independent international exploration and production company. Based in Houston, Texas, Marathon Oil had net proved reserves at the end of 2011 of 1.8 billion barrels of oil equivalent in North America, Europe and Africa.