Patent ID: 11933129
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 13:
14. A method of operating a subsea wellhead assembly, the method comprising:
receiving, at a controller of the subsea wellhead assembly, one or more command signals from a rig, the subsea wellhead assembly comprising a wellhead, a blowout preventer stack, and a lower marine riser package (LMRP);
effecting, via the controller, drilling functions of the subsea wellhead assembly, wherein the subsea wellhead assembly is an all-electric subsea wellhead assembly configured to operate without hydraulic control fluid, and wherein effecting the drilling functions of the subsea wellhead assembly includes electrically effecting, via an energy storage device at the blowout preventer stack, the drilling functions without use of the hydraulic control fluid from the rig; and
receiving, via at least one remote operating vehicle (ROV) charging port at the subsea wellhead assembly, power from a ROV for charging the energy storage device.