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Horizontal Directional Drilling (HDD)

More Than Just Digging: A Comprehensive HDD Solution

Why Bortech's HDD Approach Is Different

At Bortech, we realize that the beauty of trenchless technology is in managing and controlling underground installations, not just drilling underground. Understanding the relationship between various factors has been crucial to our successful HDD projects.

– Rob Titanic

Pilot Bore Design: Establishing the Foundation

The pilot bore is the first and one of the most consequential stages of an HDD installation.
It establishes the underground geometry for subsequent stages and must account for:

  • Entry and exit locations
  • Required depth
  • Horizontal alignment
  • Vertical curves
  • Subsurface conditions
  • Existing infrastructure
  • Drill-string behavior
  • Steering limitations
  • Final product requirements

A well-controlled pilot bore provides a solid foundation for everything that follows.

Steering Is a Technical Discipline

Modern HDD tracking technology has transformed directional drilling.

Tracking systems provide information about the drill head's position and orientation.

However, technology alone doesn't steer a bore; the operator's experience is essential.

Understanding how the drill head responds to changing ground conditions is key.

Bore Geometry Matters More Than Most People Realize

An HDD alignment isn't just a line connecting two points; it is a three-dimensional pathway. The bore must transition smoothly and maintain the correct alignment throughout. For larger carrier pipes, considerations include stiffness, buoyancy, and the ability to negotiate curves.

From the First Investigation to the Final Pullback 

The best HDD contractor understands the right tools, alignment, and strategies for each project. 
Bortech approaches HDD with a comprehensive perspective, ensuring successful installations. 

FAQ

How does HDD steering work?
A downhole tracking system provides information about the drill head's position and 
orientation, which is used to guide the pilot bore. 
What happens if the ground conditions change during drilling?
Proper planning and contingency measures should be in place to address variations in ground 
conditions. 
Why is drilling-fluid management important?
Drilling fluid affects cuttings transport, bore stability, and installation efficiency, making its 
management crucial. 
What are inadvertent returns?
An inadvertent return occurs when drilling fluid exits the intended bore path, requiring careful planning and monitoring. 
Why is utility locating so important for HDD?
Existing infrastructure affects safety and constructability, making accurate utility locating essential during planning.