Midstream The midstream sector is a crucial stage in the oil and gas industry that bridges the gap between the upstream (exploration and production) and downstream (refining and distribution) sectors. It involves the processing, storage, and transportation of oil, natural gas, and natural gas liquids. The midstream sector plays a vital role in transforming raw hydrocarbons into usable materials for refineries and petrochemical plants. Regal Rexnord supports midstream processes through supplying innovative solutions for applications such as standby power generator sets, pipeline transmission, natural gas injection and withdrawal, and pump applications.