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BTW Thin-wall Diamond Reaming Shell
BTW reamer belongs to the TW series of small-diameter diamond reamers. It has the same diameter as BQ but is designed with thin walls, light weight, and quick feed rate, suitable for shallow - medium-depth holes (≤1500m), soft - medium-hard rocks, and efficient core sampling scenarios. It is an economical main tool for small-diameter geological exploration, shallow-hole mining, and engineering surveying.
English name: BTW Reaming Shell / TW-B Reamer / Impregnated Diamond Reamer
System: TW / Thin-walled series rope core extraction, DCDMA standard
Matching drill tools: BTW rope core double pipe, BQ drill rod, BTW drill bit
Core functions: Small-diameter diameter retention, alignment stability, protection of core tube, maintaining regularity of hole wall
Outer diameter: 59.5mm
Minimum Order Quantity: 1 PCS
Description
BTW reamer belongs to the TW series of small-diameter diamond reamers. It has the same diameter as BQ but is designed with thin walls, light weight, and quick feed rate, suitable for shallow - medium-depth holes (≤1500m), soft - medium-hard rocks, and efficient core sampling scenarios. It is an economical main tool for small-diameter geological exploration, shallow-hole mining, and engineering surveying.
English name: BTW Reaming Shell / TW-B Reamer / Impregnated Diamond Reamer
Matching drill tools: BTW rope core double pipe, BQ drill rod, BTW drill bit
Outer diameter: 59.5mm
Structure and Materials (Lightweight and High-Efficiency Des
1.High-strength thin-walled base: 40Cr alloy steel forged, with thin pipe wall and light weight (approximately 0.8kg), moderate torsional resistance, low drilling resistance, suitable for shallow - medium deep hole high-frequency operations.
2. Efficient wear-resistant mat: Fine-grained tungsten carbide + low-melting-point binder phase, with a temperature resistance of 1050℃, suitable for soft - medium-hard rocks, with good mat toughness and less prone to fragmentation.
3. Diamond working layer (small diameter compatibility):
Inlaid diamond (standard): Fine-grained high-toughness diamond, stable lifespan, preferred for medium-hard rock / crushed formations.
Surface-set natural diamond (fast type): Large-grain natural drill, fast advancement, smooth chip removal, high efficiency for soft rock / intact formations.
PCD reinforced type (wear-resistant type): PCD embedded in the diameter section, lifespan increased by 30%, applicable to medium-hard grinding formations.
Small-diameter spiral water channel: 3–4 spiral edges + shallow and wide water channel + small angle, smooth water flow, fast chip removal, prevents mud packing and sticking, suitable for small-diameter low-flow conditions.
Core advantages (compared to BQ)
1.Lightweight and efficient: About 20% lighter than BQ, with lower torque requirements, faster drilling, and a 25%+ improvement in overall efficiency for shallow holes.
2. Precise wellbore stability: Stable φ60mm wellbore, less prone to shrinkage in small diameters, ample gap for changing drill bits, and smooth wellbore walls.
3. Stable alignment: Three pads + short guide section, suppressing the swaying of small-diameter drilling tools, with a well deviation control of ≤ 0.8°/100m.
4. Economical and durable: Single drill string can advance 1500–2000 meters, with a pure drilling time of 180 hours +, offering high cost-effectiveness for soft to medium-hard rock.
5. Protecting drill tools: Sharing radial wear, extending the lifespan of BTW outer pipe and BQ drill rods, and reducing the cost of small-diameter drilling.
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