Project Final Report-10121-4502-01-In Reverse-Circulation Primary Cementing (RCPC) fluids are pumped downhole via the annulus and then up into the casing, in contrast to a conventional cement job where fluids are pumped down the casing then up into the annulus. The objective of the RPSEA Deepwater Reverse-Circulation Primary Cementing (RCPC) project is to assess the viability of performing RCPC to reduce circulation pressure requirements for deepwater wells, to determine required technology to apply RCPC for deepwater wells, and to present development strategies for required technologies. This report is submitted in fulfillment of Task 19 of the Deepwater Reverse-Circulation Primary Cementing project and contains a summary of Phase I and II activities.