Pilot bore profile logger

A horizontal directional drilling (HDD) system, comprising:

• an HDD drilling rig operatively coupled to a drill string, the drill string including one or more drill rods, the drill string carrying a drill head at an end thereof distal to the HDD drilling rig, the drill head configured to drill through a terrain, the drill head including an underground transmitter, the underground transmitter configured to transmit at least a signal corresponding to a pitch of the drill head;
• a walk-over locator configured for use on the terrain generally above the underground transmitter, the walk-over locator configured for receiving at least the signal corresponding to the pitch of the drill head, the walk-over locator configured to determine the pitch of the drill head based on the signal, the walk-over locator configured to at least one of directly measure a first depth of the drill head or provide a Global Navigation Satellite System (GNSS) geolocation of the drill head at a given instance in the drilling process, the walk-over locator configured to relay at least one of the first depth or the GNSS geolocation of the drill head at a given instance in the drilling process;
• and
• a remote display associated with the HDD drill rig, the walk-over locator configured to communicate the pitch of the drill head to the remote display, the remote display configured to use the pitch and a length of at least one of a given drill rod or a group of drill rods to determine a second depth of the drill head at a given drilling distance, the second depth of the drill head and the GNSS geolocation being at least one of stored or displayed as part of a pilot bore profile when the first depth is unavailable or inaccurate, the pilot bore profile comprising a plot of one or more depths at one or more respective drilling distances, the remote display configured to overlay at least one of the first depth or the GNSS geolocation of the drill head and the second depth in the drilling process with the pilot bore profile.