University of Wisconsin-Madison

Disposition - Miscellaneous: Drill Heads (3 units)

  • Connecting Drill Head to Weight Stack
  • Drill Head Calipers Compressed
  • Drill Head and Weight Stack Down Hole
  • Drill Head Close
  • Weight Stack
  • Weight Stack on Tower Rack
  • Name Drill Heads (3 units)
    Description Used to provide real time feedback on hole characteristics. Below the drill head, a long weight stack holds the drill plumb and directs flow to the drilling nozzle at the bottom.
    Tech Specs
    • Manufactured by PSL
    • Has on-board sensors and navigation package for depth (by pressure), tilt, x and y position, theta (rotation), drill water temperature, hole water temperature, hole diameter, sensor cavity temperature and pressure, acceleration, load (drill head and weight stack)
    • Weight stack and nozzle are approx. 75 ft in length and consists of 6 coupled sections. Each section is insulated. The bottom-most section is tapered.
    • Each unit weighs approx. 1100 lb. (drill head only). The weight stack altogether weighs another 900 lb.