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Horizontal Directional Drill on Tracks

Trenchless utility installation relies on tracked horizontal directional drills to install underground pipes without disturbing the surface.

Side view of a horizontal directional drilling rig with long frame and tracks.
Horizontal Directional Drill on Tracks
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Tracked Horizontal Directional Drill Rig

A specialized horizontal directional drilling rig features a distinct long slant frame mounted on a compact crawler track chassis. The angled frame guides drill rods into the ground at controlled angles.

Technology of Trenchless Horizontal Drilling

Horizontal directional drilling is a trenchless method used to install utilities like water lines, fiber optic cables, and gas pipes under roads and rivers. Unlike vertical drills that bore straight down, directional drills push flexible drill rods into the ground at an angle and steer them horizontally underground. Guidance sensors in the drill bit transmit location data back to the surface operator, allowing precise navigation around existing pipes.

Realistic Colors of Horizontal Directional Drills

  • Slanted drill frame: Bright yellow, orange, or green
  • Crawler track base: Black rubber or steel gray
  • Drill rod rack: Dark steel gray
  • Operator station: Yellow housing with black controls
  • Hydraulic fluid tanks: Painted yellow or white
Questions and answers

Questions and Answers About Horizontal Directional Drills

Why use horizontal drilling instead of digging a open trench?
Horizontal drilling allows utility lines to be placed under busy streets, buildings, or rivers without tearing up paving or stopping traffic.
How can a drill steer horizontally underground?
The drill bit has an angled face and electronic transmitters that allow the operator to steer left, right, up, or down from the control station.
What pulls the new pipe into place?
After boring the underground path, the drill head connects to the new pipe and pulls it backward through the newly created tunnel.
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