​Energy Transfer
Williams Companies
Eagle Rock Energy
Momentum Midstream
Utica East Ohio Midstream
Regency Gas
Lone Star NGL  -Mount Belvieu
CenterPoint Energy
Enable Midstream Partners
CenterPoint Energy
Saddle Butte
Plains Marketing 
American Central
SEC  Compression
EOG Resources Inc.
Petrochem Operating
Sunoco Logistics Partners
Rose Rock Midstream
Ross Engineering
Kinder Morgan
Targa Resources

​Howard Energy 
Chesapeake Energy
Devco USA
Navajo/ Holly Refinery
Mecor / Reficar Refinery
Safwan Petroleum
RBP Products
CHS Refinery
Chesapeake Energy
Kuwait Oil Company
Interstate Treating
Navajo Refinery
Giant Refinery
Wynnewood Refinery
Frontier Refining Company 
Conoco Philips Ferndale Refinery
Anadarko Petroleum Corporation
Strategic Petroleum Reserve 
Toro Energy
Sulfur River Gathering
PetroHawk Energy