EN
NRQ-IUW Variable Wall Internal Upset Wireline Core Drill Rod
NRQ-IUW series variable wall thickness inner upset wireline coring drill rod is high-strength drilling pipe specially applied for medium and deep geological exploration. Adopting integrated integral hot inner upset forming technology with independent variable wall thickness structure, it adopts universal industrial standard descriptions to avoid patent proprietary naming and copyrighted structure description risks of competing products. It is suitable for diamond wireline coring drilling within 2440m depth, widely used in metal mineral exploration, deep geological mapping, hydrogeological survey, mine underground coring and other drilling projects.
Certificates: ISO, RoHS, MSDS
Material: ZT950
Available Lengths: 1m, 1.5m, 3m
Recommended Drilling Depth: 2440m
Description
NRQ-IUW series variable wall thickness inner upset wireline coring drill rod is high-strength drilling pipe specially applied for medium and deep geological exploration. Adopting integrated integral hot inner upset forming technology with independent variable wall thickness structure, it adopts universal industrial standard descriptions to avoid patent proprietary naming and copyrighted structure description risks of competing products. It is suitable for diamond wireline coring drilling within 2440m depth, widely used in metal mineral exploration, deep geological mapping, hydrogeological survey, mine underground coring and other drilling projects.
| Basic rod specification: | Outer diameter 70mm, wall thickness 4mm |
| Upset section size: | Upset inner diameter 60mm, upset outer diameter 70.5mm |
| Recommended drilling depth: | Max applicable drilling depth 2440m |
| Raw material: | ZT950 high-yield seamless steel pipe for drilling, with qualified mechanical properties for high and alternating load working conditions of medium-deep hole drilling |
| Standard single rod length: | 1.5m / 2m / 3m, customized non-standard length available |
Specifications
| Model | NRQ-IUW |
| Drill Rod Specification (mm) | 70*4mm |
| Thickened O.D/I.D (mm) | 60/ 70.5mm |
| PCS/ Bundle | 19pcs |
| Weight kg/ m | 6.6kg/m |
| Core diameter / Hole diameter | 47.6/ 75.3mm |
| Recommendation depth | 2440m |
Product features
1. Integrated Inner Upset Variable Wall Thickness Structure
The rod body and connecting joint are integrally hot forged without secondary welding. The upset end is thickened and reinforced with smooth cross-section transition, eliminating stress concentration and cracking risks of traditional welded joints. The smooth inner bore without steps lowers running and retrieving resistance of inner tube assembly, greatly improving overall wireline coring construction efficiency.
2. Premium ZT950 High-grade Steel Base Material
Made of quenched and tempered ZT950 alloy seamless steel, yield strength ≥950MPa. It possesses superior tensile, torsion, compression and anti-fatigue performance compared with conventional DZ60 geological drill rods. The rod is anti-deformation, anti-bending and anti-fracture during medium-deep hole drilling, adapting to long-term continuous operation under hard rock and high formation pressure complex strata.
3. Optimized Stable Design for Medium-deep Hole Drilling
Strict precision tolerance for inner and outer diameter of upset end perfectly matches supporting locking threads, realizing tight connection and excellent sealing without high-pressure flushing fluid leakage. Gradient variable wall thickness structure reduces alternating stress loss of rod body, ensures uniform and stable torque transmission under 2440m limit drilling depth, and reduces thread galling, abrasion and slipping failures effectively.
4. Flexible Multi-size Length Matching
1.5m short drill rods fit tunnel operation and confined narrow construction sites; 2m & 3m standard long rods match conventional surface medium-deep hole drill rigs, reduce rod joint connection times, cut assembly working hours, improve comprehensive drilling efficiency and lower joint consumption and maintenance cost.
