HDD REAMING FOR SOIL & CLAY

Fluted Reamer

The DRILLNOVA Fluted Reamer uses a tapered full-body profile, helical spoil channels and carbide cutters to enlarge HDD bores while mixing and transporting excavated material. It is configured for clay, loamy soil, compacted ground and fine gravel where continuous spoil movement and diameter control are required.

Application

HDD bore enlargement and backreaming

Formation

Clay, loamy clay, compacted soil and fine gravel

Cutting System

Carbide cutters on helical flutes

Size Range

8-40 in / approximately 200-1,000 mm

Product Overview & Application

Overview

The DRILLNOVA Fluted Reamer combines cutting, mixing and spoil transport in one tapered body. Helical channels provide a continuous path around the tool, while balanced carbide cutters enlarge the bore progressively. The design is suited to cohesive soils and fine-gravel formations with adequate drilling-fluid circulation and spoil return.

Technician welding a large HDD tool component on a rotary fixture

Continuous Helical Channels

The flute geometry creates an uninterrupted path for spoil movement around the tool.

Efficient Spoil Transport

Helical channels support mixing and transport of loosened material when fluid flow and returns are adequate.

Full-Body Bore Profile

The tapered body supports progressive enlargement and helps maintain a consistent bore diameter.

Balanced Cutter Placement

Application-matched carbide cutters help distribute cutting action around the tool body.

Design, Construction & Available Options

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Body Profile

Tapered full-body construction with continuous helical flutes.

Cutting System

Carbide cutters positioned around the flute profile for application-matched cutting coverage.

Spoil Channels

Helical channels provide continuous flow paths for mixing and transporting cut material.

Fluid Ports

Port quantity, position and flow path can be configured for the drilling-fluid program.

Cutting Direction

Forward-cutting or reverse-cutting layouts are available according to the planned operating direction.

Connection

Pin or box connection is confirmed by the drill string and approved order drawing.

Review ground gradation, packing tendency, pilot-bore geometry, expected spoil volume, drilling-fluid capacity and return path before confirming the tool. Large cobbles, competent hard rock or restricted spoil return normally require a different reamer type or a revised pass plan.

Models & Specifications

Review standard Diamond Compact PDC Bit configurations below. Final dimensions and connections are confirmed during application review.

10" Fluted Reamer

Diameter: 10" / 254mm
Cutter bit model: DT1
Number of cutter bits: 12
Connection: 2-3/8 IF BOX*BOX
Overall Length: 660mm
VIEW PDF

12" Fluted Reamer

Diameter: 12" / 304.8mm
Cutter bit model: DT1
Number of cutter bits: 15
Connection: 2-3/8 IF BOX*BOX
Overall Length: 660mm
VIEW PDF

14" Fluted Reamer

Diameter: 14" / 355.6mm
Cutter bit model: DT1
Number of cutter bits: 18
Connection: 2-3/8 IF BOX*BOX
Overall Length: 660mm
VIEW PDF

16" Fluted Reamer

Diameter: 16" / 406.4mm
Cutter bit model: DT2
Number of cutter bits: 21
Connection: 2-7/8 IF BOX*BOX
Overall Length: 835mm
VIEW PDF

18" Fluted Reamer

Diameter: 18" / 457.2mm
Cutter bit model: DT2
Number of cutter bits: 24
Connection: 2-7/8 IF BOX*BOX
Overall Length: 935mm
VIEW PDF

20" Fluted Reamer

Diameter: 20" / 508.0mm
Cutter bit model: DT2
Number of cutter bits: 27
Connection: 2-7/8 IF BOX*BOX
Overall Length: 935mm
VIEW PDF

Use, Quality & Documentation

Use & Installation

Confirm connection, cutting direction, pass diameter, make-up procedure and clear flow paths before operation.

Inspection / Replacement

Inspect cutters, flute edges, fluid ports, welds, body profile and connection after every reaming run.

Handling / Storage

Protect cutters and connections from impact, clean blocked ports, preserve exposed steel and support the tool securely.

Visual inspection of carbide cutters and weld areas on a DRILLNOVA fluted reamer

Quality / Process Steps

1. Order and drawing review
2. Material and component verification
3. Machining and fabrication
4. Cutter and wear-protection installation

Documentation

Product Data SheetPDF ↓
Operating GuidePDF ↓
Material / Manufacturing RecordPDF ↓
Safety & Handling GuidePDF ↓

Related HDD Products

Product FAQ

What is a fluted reamer used for?

A fluted reamer enlarges an HDD pilot bore while its tapered body and helical channels support progressive cutting, soil mixing and spoil transport.

Which formations are suitable?

It is primarily intended for clay, loamy clay, compacted soil, hardpan and fine gravel. Ground containing large cobbles or competent hard rock requires a different cutting system or engineering review.

What sizes are available?

The catalogue range is 8-40 in / approximately 200-1,000 mm. Larger custom diameters can be reviewed against the formation, bore plan and rig capacity.

How is a fluted reamer different from a paddle reamer?

A fluted reamer uses a more continuous full-body profile and helical spoil channels. A paddle reamer has a more open structure. Selection depends on ground behaviour, spoil return, diameter control and the planned pass sequence.

Can the cutting direction be customized?

Yes. Forward- or reverse-cutting layouts can be supplied, but the operating direction must be confirmed before the cutter orientation and drawing are finalized.

Which connection should I select?

Provide the exact drill-string connection, pin or box orientation, reference standard and mating-tool details. DRILLNOVA will confirm the connection on the approved drawing.

Why are drilling-fluid returns important?

The helical channels need sufficient flow and a usable return path to transport loosened material. Inadequate return can increase packing, torque and the risk of the tool becoming restricted in the bore.

What should be inspected after use?

Inspect cutter wear or loss, cracked or damaged weld areas, worn flute edges, blocked fluid ports, body deformation and connection damage. Remove any questionable tool from service for qualified evaluation.

Can the cutter layout be customized?

Yes. Diameter, flute geometry, cutter number and placement, fluid ports, cutting direction, connection and wear protection can be reviewed for the application.

Configure the Right Fluted Reamer

Share the target diameter, pilot-bore size, soil description, rig model, drill-string connection, drilling-fluid capacity and planned pass sequence. DRILLNOVA will review the application and confirm the recommended configuration.

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