Subsea processing is an enabling technology for deepwater-oilfield development. The primary technologies of interest are fluid separation and pumping. Subsea processing is a significant technology that presents and will continue to bring many challenges and opportunities to the industry. Can we safely and economically move traditional field-processing equipment from the surface to the ocean floor? There is a strong incentive to eliminate (or greatly reduce the size of) surface-supported processing facilities; they are expensive and heavy, they can certainly be the long-lead item on a schedule, and they are susceptible to environmental (weather) effects that will affect operations.