Patent ID: 8961247
Filing Date: 2015-02-24
Classification: B63H,B63J,E21B,H02J

Abstract:
1. A power supply system for a marine drilling vessel, comprising: a first power grid section coupled to a generator configured to generate electric power and further coupled to an electrically powered active heave compensator configured to raise and lower a drill string relative to the marine drilling vessel, wherein the active heave compensator is configured to generate electric power when lowering the drill string, and a second power grid section coupled to a generator configured to generate electric power and further coupled to an electrically powered thruster drive of the marine drilling vessel, wherein the first power grid section is electrically coupled to the second power grid section, and wherein the power supply system configured to supply electric power generated by the active heave compensator during heave compensation to the thruster drive for operating the thruster drive.