A swivel for horizontal directional drilling (HDD) is a critical tool in trenchless projects. It keeps pipelines and cables safe during pullback and helps ensure a smooth installation. In HDD, accuracy and the right equipment make the difference between success and costly problems.

What does a swivel do in HDD?

A swivel, also called a rotary coupling, is a critical HDD tool that prevents the pipeline or conduit from rotating during the pullback process. During drilling, the drill string and the reamer rotate to create the borehole, but when the pipeline is pulled back through this borehole, rotation can cause the pipeline to twist, kink, or get damaged.

The swivel is strategically placed between:

  • The drill string and the pipeline, or
  • The reamer and the pipeline.

This setup allows the drill string and reamer to continue rotating freely while the pipeline remains stationary, ensuring safe and damage-free installation.

Why using a High-Quality Swivel Matters

A reliable swivel for horizontal directional drilling offers clear advantages:

  • Pipeline protection: No twisting, curling, or kinking
  • Reduced friction: Easier pullback with less resistance
  • Higher efficiency: Minimizes downtime and repair costs
  • Durability: Built from corrosion-resistant steel or alloy to handle extreme tension and harsh ground conditions

The Swivel’s Place in the HDD Toolkit

While the swivel is a key component, other HDD drilling tools—such as drill rods, reamers, and drill bits—work together to ensure a successful installation. Using the right combination of tools guarantees a smooth, precise, and safe HDD project.