A 40 m Environmental Drill Rig: When 25 m Is Not Enough

Depth is rarely the first criterion when buying an environmental drill rig, but it is often what limits the business later. When the machine cannot reach where the project demands, the company turns the job down, subcontracts it or delivers an incomplete investigation. This article lists the signs that your reach has become too short.

Why depth matters in environmental investigation

On contaminated sites, the depth you must reach is not the driller's choice. It comes from the terrain and the investigation plan: where the water table is, how far the plume has migrated and which layers need to be characterized. The longer the machine's reach, the fewer projects fall outside your range.

Five situations where 25 m is not enough

1. Deep water table. Where groundwater sits many meters down, part of the rig's reach is spent just getting to the water. What remains for sampling and installing the well may not be enough.

2. Plumes that migrate at depth. Contaminants denser than water tend to sink. Delineating the plume requires samples at several depths.

3. Multilevel wells and clusters. To understand flow and the vertical distribution of contamination, the project may call for wells at different depths at the same location.

4. Large industrial plants. Older plants, buried tanks and pipelines often require investigation in deeper layers.

5. Client or regulator requirements. Terms of reference may set minimum investigation depths.

What a 40 m reach changes

• More projects accepted: you stop turning down or subcontracting jobs because of depth.

• Fewer mobilizations: a single rig covers the full scope, from shallow sampling to deep wells.

• More technical margin: spare depth keeps you from working at the limit of the machine.

But depth is not everything

Reach only counts if it comes with power, suitable tooling and ease of transport and operation. Check the datasheet for the real depth of each method (direct push and hollow stem auger), the maximum auger diameter, the machine's weight and how it moves on site.

SAM 400: 40 m in direct push and in hollow stem auger

The SAM 400, from Diamond Drill, combines:

• 89 CV diesel engine.

• Direct push up to 40 m.

• Hollow stem auger (HSA) of 7.1/2" x 4" up to 40 m.

• 3,950 kg weight and a remote control for moving the rig, included.

See the details on the SAM 400 page and talk to our technical team to check whether this reach fits the projects you bid on.