Sentinel Midstream Texas, a midstream solutions for crude oil provider, and ExxonMobil Pipeline, an oil & energy company, agreed to form Enercoast Midstream, a joint venture. "We are extremely pleased to establish a joint venture with ExxonMobil to maximize the potential of Enercoast. Sentinel looks forward to the opportunity to serve ExxonMobil and other shippers in the Houston market," Jeff Ballard, Sentinel President and CEO.