Definitions for "midstream"
A term sometimes used to refer to those industry activities that fall between exploration and production (upstream) and refining and marketing (downstream). The term is most often applied to pipeline transportation of crude oil and natural gas.
All activities associated with storage and transport of crude oil and natural gas (before processing) via ship, rail, truck or pipeline.
Sector comprising all those activities relating to the construction and management of the oil transport infrastructure.
Keywords:  horses, don't, middle, stream, change
the middle of a stream; as, don't change horses in midstream.
Natural gas gathering, processing and marketing operations.