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Petroleum Helicopters International, Inc., is an American commercial helicopter operator, founded in 1949, by Robert L.
Frontier El Dorado Refining Company is a El Dorado, KS-based company in the Energy and Utilities sector.
glamisresources is a Calgary, AB-based company in the Energy and Utilities sector.
Comac Pump is a Kingston, NH-based company in the Energy and Utilities sector.
The Crestwood family of companies includes two publicly traded master limited partnerships, Crestwood Equity Partners LP (NYSE: CEQP) and Crestwood Midstream Partners LP (NYSE: CMLP). We own and operate midstream assets reaching across the energy value chain, serving producers and users of hydrocarbons in premier shale plays across the United States including the Marcellus Shale, Bakken Shale, Eagle Ford Shale, Permian Basin, Powder River Basin Niobrara Shale, Utica Shale, Barnett Shale, Fayetteville Shale and Haynesville Shale.