3 Marcellus Midstream Companies Top Customer Satisfaction Survey Energy Services | Industrywide Issues | MarkWest Energy | Pipelines | Processing Plants | Research | Sunoco Logistics | Williams Partners May 15, 2013May 15, 2013 EnergyPoint Research released an overview of their biannual Midstream Services Study this morning. Three companies with large Marcellus operations top the list Please Login to view this content. (Not a member? Join Today!) Related