Patent ID: 8212378

Claim:
A maritime well system, comprising: a sea-surface control unit; a sea-bed control unit coupled to the sea-surface control unit by a sub-sea cable configured to carry a direct current (DC) voltage output from the sea-surface control unit at least 30 kilometers to the sea-bed control unit, wherein the sea-bed control unit produces a reduced converted voltage from the DC voltage; and a sub-sea tree coupled to the sea-bed control unit via a connecting line configured to carry the reduced converted voltage output from the sea-bed control unit to the sub-sea tree, wherein the sub-sea tree comprises a plurality of electrical devices and wherein the connecting line directly couples the reduced converted voltage to a least one of the plurality of electrical devices; wherein the DC voltage output is at least 3000V for transmission via the sub-sea cable to the sea-bed control unit and wherein the reduced converted voltage output is at least 240V for transmission via the connecting line to the sub-sea tree.