Patent ID: 8902077

Claim:
A system usable with a subsea well, the system comprising: a marine riser extending from a sea surface platform toward the subsea well; a flow path within the marine riser; a tubular string configured to be run through the marine riser from the surface of the sea to a position proximal to the sea bed; a tool; a hydraulic power subsystem connected to the tubular string and positioned within the marine riser to provide power to the tool; an umbilicalless power system to provide power to the hydraulic power subsystem; an umbilicalless communication system to establish communication between the position proximal to the surface of the sea and the position proximal to the sea bed to control the hydraulic power subsystem; and a first acoustic modem of the umbilicalless communication system located at the position proximal to the surface of the sea; and a second acoustic modem of the umbilicalless communication system located at the position proximal to the sea bed and connected to the hydraulic power system for receiving control instructions from the first acoustic modem and transmitting parameter data to the first acoustic modem, wherein the system does not include an umbilical cord, extending from the sea surface through the marine riser.