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NTW Thin-wall Diamond Reaming Shell
NTW reaming tool belongs to the TW series of rope core diamond reaming tools with a medium-sized diameter. It is positioned between the BTW and HTW models and is designed for medium and deep holes, hard rocks, and high-mobility strata. It strikes a balance between efficiency and durability, and is the main tool for metal ore exploration, medium and deep-hole hydrology/geothermal exploration, and engineering surveys.
English name: NTW Reaming Shell / TW-N Reamer / Impregnated Diamond Reamer
System: TW / Thin Wall Series Wireline Core, DCDMA Standard
Compatible drilling tools: NTW wireline core double / triple pipe, NQ drill pipe, NTW drill bit
Core functions: Maintain bore diameter, strong alignment, stabilize hole wall, protect core tube and drill pipe
Outer diameter: 75.5mm
Minimum Order Quantity: 1 PCS
Description
NTW reaming tool belongs to the TW series of rope core diamond reaming tools with a medium-sized diameter. It is positioned between the BTW and HTW models and is designed for medium and deep holes, hard rocks, and high-mobility strata. It strikes a balance between efficiency and durability, and is the main tool for metal ore exploration, medium and deep-hole hydrology/geothermal exploration, and engineering surveys.
English name: NTW Reaming Shell / TW-N Reamer / Impregnated Diamond Reamer
Compatible drilling tools: NTW wireline core double / triple pipe, NQ drill pipe, NTW drill bit
Outer diameter: 75.5mm
Minimum Order Quantity: 1 PCS
Structure and Material (Deep Hole Reinforcement Design)
1.High-strength Alloy Matrix: 40CrNiMo forged, moderate pipe wall thickness, strong torsion / vibration resistance, suitable for 1800m deep hole high load.
2. High Wear Resistance Mat: Coarse-grained tungsten carbide + high toughness binder phase, with a temperature resistance of 1100℃, resistant to cracking in hard rock / grinding strata, long service life.
3. Diamond Working Layer (Suitable for Hard Rock):
Inlaid Diamond (Standard): High-strength fine-grained diamond, single branch advance length 2500–3000 meters, preferred for hard rock / crushing strata.
PCD Reinforced Type: The pilot section embeds multi-angled PCD, life is increased by 30%, applicable to strong grinding strata.
Surface Set Natural Diamond (Quick Type): Fast advance, smooth chip removal, high efficiency in medium-hard intact strata.
High-efficiency Spiral Water Channel: 4 spiral edges + wide and deep water channel + guiding slope, resistance drop 30%+, fast chip removal, anti-mud packing, suitable for deep hole with medium-high flow rate.
Core advantages (compared with BTW/HTW)
1.Stable and precise wellbore diameter control: φ75.7mm precise diameter control, composite diameter control structure, no diameter reduction within 1800m, sufficient gap for changing drill bits.
2. Strong steering and anti-slip: four pad blocks + extended guide section, suppress drill rig oscillation, hole deviation control ≤ 0.6°/100m, suitable for directional drilling.
3. Long service life in hard rock: single drill string advance 3000m +, pure drilling time 250 hours +, excellent performance in crushing / grinding formations.
4. Efficient chip removal and resistance reduction: spiral water channel design, smooth water flow, fast chip removal, reduces the risks of sticking and mud packing.
5. Economically adaptable: combines the light weight of BTW with the wear resistance of HTW, providing the best overall cost-effectiveness for medium and deep hole hard rock drilling.
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