What is HDD?
Horizontal Directional Drilling is a trenchless method: a rig drills a pilot hole along a planned path, enlarges it with reamers and then pulls the pipe or duct back through. It is widely used for telco ducts, water and gas pipes and power cables where open excavation would disrupt roads, rivers or buildings. For transport, it means heavy, specialised equipment arriving in a set order.
Typical HDD equipment and transport points
| Item | What to tell the transporter |
|---|---|
| Drilling rig | Weight, dimensions, tracked or wheeled, and whether it can drive up a ramp or must be lifted |
| Drill rods and reamers | Rod length and count, bundle or rack weight, and how tooling is crated |
| Mud mixing / recycling unit | Skid dimensions, lifting points and whether hoses and pumps travel separately |
| Bentonite and water tanks | Empty or containing material, cleaned or not, and tank dimensions |
| Bentonite and additives | Number of bags or pallets, total weight and weather protection |
| Product pipe or ducts | Coils or straight lengths, the longest length and total weight |
| Generator, excavator, site cabin | Separate weights and dimensions; often separate loads |
Plan by stage, not by item
Group loads into mobilisation (rig, mud system, tanks, support machinery), drilling (bentonite, additives, replacement tooling) and pullback (product pipe or ducts, often staged near the exit point). Demobilisation reverses the order. Sharing this sequence early lets the transporter plan vehicles for each stage instead of reacting to individual calls.
Work fronts move
HDD crews often move from one road or river crossing to the next. Each transfer needs a new pickup and destination pin, a site contact and confirmation that the next site is ready to receive. Do not assume a lorry remains reserved between crossings unless that has been agreed. For a step-by-step list, use the HDD site transport checklist.