Type B Hard Formations
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Engineered drilling tools designed for demanding oilfield applications.
Roller Reamer
Roller Reamer is a downhole drilling tool used for hole conditioning, gauge control, and stabilization in oil & gas drilling operations. Available in near-bit and string configurations with multiple cutter types to suit different formations.
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Downhole Tools
1. Product Overview
Roller Reamer is a downhole drilling tool designed for hole conditioning, gauge maintenance, and drilling stabilization. Installed near bit or in the drill string, it helps maintain hole size, reduce vibration, and improve drilling efficiency by reaming ledges, stabilizing the BHA, and smoothing wellbore irregularities.
Unionlever OFS supplies roller reamers manufactured per customer drawings or project specifications, with flexible cutter configurations to match formation hardness and drilling objectives.
2. What We Supply
- Near-bit roller reamer for gauge protection and directional control
- String roller reamer for hole conditioning and BHA stabilization
- Fixed-body roller reamer designs with replaceable cutter components
- Custom configurations manufactured per drawing or approved sample
3. Key Features & Technical Highlights
- Robust body design for high load and impact drilling environments
- Multiple cutter options to suit soft, medium, and hard formations
- Optimized cutter arrangement for smooth reaming and reduced torque
- Precision-machined interfaces for stable cutter and pin assembly
- Designed to improve hole quality and reduce drilling vibration
4. Applications
- Hole conditioning and gauge maintenance during drilling operations
- Directional, horizontal, and vertical drilling applications
- Hard and abrasive formations requiring controlled reaming
- BHA stabilization to protect drill bit and downhole tools
5. Technical Specifications
| Item | Typical Option / Notes |
|---|---|
| Type | Near-bit / String roller reamer |
| Hole Size Range | Per project requirement and drawing |
| Cutter Type | Various cutter styles per formation hardness |
| Body Material | High-strength alloy steel |
| Connections | NC / REG or per customer specification |
Type F Medium to Hard Formations
Type T Soft Formations
Specifications - Roller Reamer
Hole Size | 0.D | I.D. | Fishing neck 0.D | Overall length(mm) | Connection | ||
(in) | (mm) | (mm) | (mm) | String type | Near bit type | String type | Near bit type lower |
57/8 | 149.2 | 25.4 | 120.7 | 1470 | 1370 | NC38 | 3 1/2 REG |
6 | 152.4 | 25.4 | 120.7 | 1470 | 1370 | NC38 | 3 1/2 REG |
61/8 | 155.6 | 25.4 | 120.7 | 1470 | 1370 | NC38 | 3 1/2 REG |
83/8 | 212.7 | 44.5 | 165.1 | 1700 | 1600 | NC50 | 4 1/2 REG |
81/2 | 215.9 | 44.5 | 165.1 | 1700 | 1600 | NC50 | 4 1/2 REG |
12 | 304.8 | 71.4 | 81/4 | 1800 | 1700 | 6 5/8 REG | 6 5/8 REG |
121/8 | 308 | 71.4 | 81/4 | 1800 | 1700 | 6 5/8 REG | 6 5/8 REG |
121/4 | 311.2 | 71.4 | 81/4 | 1800 | 1700 | 6 5/8 REG | 6 5/8 REG |
16 | 406.4 | 76.2 | 241.3 | 2100 | 2000 | 7 5/8REG | 7 5/8REG |
171/2 | 444.5 | 76.2 | 241.3 | 2100 | 2000 | 7 5/8 REG | 7 5/8 REG |
20 | 508 | 76.2 | 241.3 | 2100 | 2000 | 7 5/8 REG | 7 5/8 REG |
22 | 558.8 | 76.2 | 241.3 | 2200 | 2100 | 7 5/8 REG | 7 5/8 REG |
24 | 609.6 | 76.2 | 241.3 | 2400 | 2300 | 7 5/8 REG | 7 5/8 REG |
26 | 660.4 | 76.2 | 241.3 | 2400 | 2300 | 7 5/8 REG | 7 5/8 REG |
28 | 711.2 | 76.2 | 241.3 | 2400 | 2300 | 7 5/8 REG | 7 5/8 REG |
6. Quality & Inspection (Project-Based)
- Incoming material inspection with MTC review when required
- In-process dimensional and assembly checks
- Final inspection before packing with photo records available
- Third-party inspection support upon request
7. Spare Parts & After-Sales Support
- Supply of roller reamer spare parts including blocks, cutters, pins, and beads
- Repeat-order support based on drawing and BOM records
- Packaging and labeling aligned with customer maintenance workflow
Why Unionlever OFS?
Unionlever OFS approaches roller reamer supply from an engineering perspective, focusing on cutter layout, structural integrity, and field compatibility rather than generic catalog designs. We help customers reduce trial risks, shorten confirmation cycles, and build stable long-term supply for both complete tools and critical spare parts.
Note: Please keep your existing cutter example images (Type B / Type F / Type T) directly below this section, as they help customers choose quickly.
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Contact Phone
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sales@unionleverofs.com
ofs@unionlever.com
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Related Products
Building upon more than a decade of field experience, Unionlever OFS offers a comprehensive portfolio covering downhole drilling tools, fishing tools, handling tools, well control equipment, cementing tools, and solid-control systems.
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Unionlever Oilfield Equipment Co., Limited
A Member of
Unionlever International Group Limited
(Established Since 2010)
"To be a globally trusted leader in oilfield equipment and integrated supply solutions."
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