Patent ID: 11927090
Assignee: VERMEER MANUFACTURING COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E

Claim 6:
7. A horizontal directional drilling system comprising:
a horizontal directional drilling machine;
a drill string terminating at a drill head and configured to be driven by the horizontal directional drilling machine to create an underground borehole extending at least partially horizontally between an entry point and an exit point;
an adapter assembly configured to couple a utility line and a pair of insulated wires to the drill string;
an observation device configured to be attached to the drill string;
a power line communication (PLC) subsystem including the pair of insulated wires, a downhole PLC encoder, and an uphole module connected with the observation device over the pair of insulated wires for simultaneous half-duplex transmission of data from the observation device and power delivery from a power supply to the observation device.