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Petroleum Helicopters International, Inc., is an American commercial helicopter operator, founded in 1949, by Robert L.
Arsenal Energy Inc. is a Edmonton, AB-based company in the Energy & Utilities sector.
Kiffmeyer Inc is a Minneapolis, MN-based company in the Energy and Utilities sector.
Stoneham Drilling Trust is a Calgary, AB-based company in the Energy & Utilities sector.
Tucker Energy Services is a Tulsa, OK-based company in the Energy and Utilities sector.