A subsea well production system includes a subsea boost pump coupled with a subsea tree conduit having a valve in the subsea tree conduit. A boost pump outlet conduit connects between a discharge of the boost pump and an outlet flow line. A recirculation line extends from the boost pump outlet conduit to the subsea tree conduit. A chemical injection line having a chemical source valve extends from a chemical injection source and is connected to the subsea tree conduit at a point between the valve in the subsea tree conduit and the intake of the boost pump. During production flow boosting, the boost pump pumps well fluid. During chemical injection, the boost pump pumps chemicals into the subsea tree.