SOIL & WEATHERED GROUND REAMING

Fly Cutter Reamer

The DRILLNOVA Fly Cutter Reamer uses an open welded frame to provide flow area for cuttings and drilling fluid while replaceable carbide cutters support aggressive cutting and bore conditioning. Forward or reverse cutter layouts, diameter and connection are selected for the formation, bore plan and tool string.

Application

HDD bore enlargement, cutting and conditioning

Formation

Compacted soil to selected weathered rock

Cutting System

Replaceable carbide cutters

Body & Connection

Open welded frame; pin/box by tool string

Product Overview & Application

Overview

The DRILLNOVA Fly Cutter Reamer is an open-body HDD tool for compacted soil, sandy loam and selected weathered rock. Its open frame supports fluid flow and spoil removal, while replaceable carbide cutters provide efficient cutting and bore conditioning. Each configuration is matched to the formation, bore size and reaming plan.

Technician checking the alignment of a curved steel plate on a machined shaft

Open-Face Flow Area

The open frame provides space for drilling fluid and loosened material to move around the tool.

Replaceable Carbide Cutters

Replaceable cutters are positioned according to the expected wear pattern and formation.

Forward or Reverse Cutting

Forward and reverse cutter arrangements are available to match the planned operating direction.

Application-Matched Configuration

Diameter, cutter layout, wear protection and connection are reviewed for the formation and tool string.

Design, Construction & Available Options

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Body Construction

Open welded frame designed to provide flow area and a lower-mass structure than a full-body barrel reamer

Cutter Type

Replaceable carbide cutters selected for the confirmed formation and wear pattern.

Cutter Layout

Forward or reverse cutter positions; final arrangement is matched to the operating direction and bore plan.

Wear Protection

Wear protection is applied according to the tool configuration and expected contact zones.

Flow Area

Open-face geometry supports fluid circulation and spoil movement around the body.

Connection

Pin or box connection selected by tool string and confirmed at order.

Final diameter, cutter layout, wear protection, connection and operating parameters are confirmed after reviewing the formation, bore geometry, reaming direction, fluid system, rig capacity and cuttings return.

Models & Specifications

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

10"Fly Cutter Reamer

Diameter: 10"/254mm
Cutter bit model: DT1
Number of cutter bits: 30
Connection: 2-3/8 IF BOX*BOX
Overall Length: 900mm
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12"Fly Cutter Reamer

Diameter: 12"/304.8mm
Cutter bit model: DT1
Number of cutter bits: 30
Connection: 2-3/8 IF BOX*BOX
Overall Length: 900mm
VIEW PDF

14"Fly Cutter Reamer

Diameter: 14"/355.6mm
Cutter bit model: DT2
Number of cutter bits: 33
Connection: 2-7/8 IF BOX*BOX
Overall Length: 1000mm
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16"Fly Cutter Reamer

Diameter: 16"/406.4mm
Cutter bit model: DT2
Number of cutter bits: 33
Connection: 2-7/8 IF BOX*BOX
Overall Length: 1000mm
VIEW PDF

18"Fly Cutter Reamer

Diameter: 18"/457.2mm
Cutter bit model: DT2
Number of cutter bits: 36
Connection: 2-7/8 IF BOX*BOX
Overall Length: 1100mm
VIEW PDF

20"Fly Cutter Reamer

Diameter: 20"/508.0mm
Cutter bit model: DT2
Number of cutter bits: 36
Connection: 2-7/8 IF BOX*BOX
Overall Length: 1100mm
VIEW PDF

Use, Quality & Documentation

Use & Installation

Confirm the approved cutting direction, cutter layout, connection and thread engagement before operation. Check tool alignment and ensure the selected diameter matches the planned reaming pass. Use only the operating parameters supplied with the confirmed tool specification.

Inspection & Cutter Service

After each run, clean and inspect the carbide cutters, cutter supports, weld areas, wear protection, open frame, body and connection. Record missing or loose cutters, impact damage, cracking, deformation, excessive wear or connection damage before the next pass. Replaceable cutters should be serviced according to the approved installation and inspection criteria.

Handling & Storage

Follow an approved lifting and handling plan suitable for the tool's size and mass. Protect the carbide cutters and threaded connection from impact and contamination. Support the reamer securely during transport and store it clean and dry with the connection covered.

Close-up of DRILLNOVA fly cutter reamer carbide cutters and reinforced structure

Quality / Process Steps

1. Configuration Verification
2. Cutter & Support Inspection
3. Weld & Wear-Area Review
4. Diameter & Profile Inspection

Documentation

Product Data SheetPDF ↓
Operating Parameters & Pass PlanPDF ↓
Cutter Inspection / Replacement GuidePDF ↓
Final Inspection ChecklistPDF ↓

Related HDD Products

Product FAQ

What is a Fly Cutter Reamer used for?

A Fly Cutter Reamer is used in horizontal directional drilling to enlarge and condition a pilot bore. Its open frame provides flow area, while carbide cutters cut and loosen suitable soil and selected weathered material.

Which formations are suitable?

The catalog recommends compacted soil or hardpan, sandy loam and selected weathered rock. Cemented inclusions, coarse aggregate or abrupt impact loading require additional application review.

What sizes are available?

Configured diameters from 8-36 in / 200-900 mm are listed. Larger sizes may be available after reviewing the application, tool string and rig capacity.

Can it be used in competent hard rock?

Competent hard rock is not recommended without review. A rock-specific PDC reamer or roller-cone hole opener may be more appropriate, depending on formation strength, abrasivity and bore requirements.

What is the benefit of the open-frame design?

The open face provides flow area around the tool, supporting drilling-fluid circulation and spoil movement. It also creates a lower-mass body than a full barrel design, although the correct choice still depends on the bore and ground conditions.

Are forward and reverse cutting configurations available?

Yes. The catalog lists forward and reverse cutter options. The final layout must match the intended operating direction and reaming plan.

Are the carbide cutters replaceable?

Yes. The cutting system uses replaceable carbide cutters. Cutter layout and replacement criteria are confirmed for the selected configuration.

What connections are available?

The connection is selected by tool string, with pin or box details confirmed at order.

What project information is required for selection?

Provide the geotechnical information, bore profile, pilot-hole size, target diameter, planned passes and cutting direction, rig model and capacity, drill-string connection, fluid system and expected cuttings-return conditions.

What should be inspected after each run?

Inspect the cutters, supports, weld areas, wear protection, open frame, body and connection. Missing cutters, cracking, impact damage, deformation or excessive wear should be reviewed before reuse.

Request a Fly Cutter Reamer Technical Review

Share your formation, bore geometry, target diameter, cutting direction, tool-string connection and rig details. Our team will review the application and confirm a suitable Fly Cutter Reamer diameter, cutter layout, wear protection and connection.

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