Abstract: A pump 12 is (or pumps are) located in a blind foundation pile 14 that has been driven into the sea floor. The top of the pile 14 is provided with a fitting that includes an inlet 18, a hanger 24 for the pump 12, and an outlet 20. water is delivered from a filtering and treatment apparatus into the pile 14 through the inlet 18. The pump 12 delivers the water under pressure through the outlet 20 into piping that directs the water to the water injection well.

Abstract: An apparatus and method that uses the local raw water injection equipment to use the minimally processed seawater as the hydraulic power fluid for the downhole turbine/pump arrangement. In one embodiment, the raw water provides the hydraulic power to the downhole equipment via the production well annulus in an open loop arrangement. The raw water is co-mingled with the production fluids. In another embodiment, the raw water provides the hydraulic power to the downhole equipment via the production well annulus in a closed loop arrangement. The raw water is not co-mingled with the production fluids. In another embodiment, the raw water provides hydraulic power to the downhole equipment via the production well annulus in an open loop downhole arrangement. The raw water discharged from the turbine is conveyed to a suitable formation for injection via a dual completion well.