Technical Specification and Operational Applications of T45 Extension Drill Rods

Date: 2025-03-25     Source: SDK      Author: admin

1. Product Definition and Primary Applications

The T45 extension drill rod, fabricated from high-grade alloy steel (Grade 45 according to Chinese industrial standards), represents a standardized component in modern percussion drilling systems. Its primary applications span:

• Open-pit bench drilling operations requiring penetration depths exceeding 12 meters
• Underground mine development drilling in coal, metallic ores, and mineral exploration sectors
• Engineering geology surveys for rock strata characterization

2. Structural Design and Functional Advantages

The rod features a hollow-section truss design with:

• Wall thickness gradient (3.5-5.2mm) optimizing weight-to-strength ratio
• Threaded ISO 7379 connection interface with 10% taper angle for torque transmission efficiency
• Surface hardening treatment (HV 650+) on wear-prone sections

Key performance enhancements include:

• Extended effective drilling depth capability by 30-50% through modular stacking
• Enhanced rock-breaking efficiency in abrasive formations (RMR > 10 MPa) through optimized flute geometry
• Stability improvement in deviated boreholes (angle deviation < 1.5° per 30m)

3. Operational Parameter Specifications

T45 DRILL STEEL – EXTENSION RODS

4. Adaptive Drilling Environments

• Complex Geology: Demonstrated effectiveness in drilling through quartzite layers (Uniaxial Compressive Strength > 150 MPa) and boulder conglomerates
• Restricted Access: Compact diameter profile (50-89mm) enables operation in confined spaces (minimum clearance < 1.2m)
• Deep Hole Operations: Successful deployment in pilot holes exceeding 300m depth in hard rock formations

5. Customization Services

Litian Rock Tools offers precision manufacturing solutions including:

• Non-standard length customization (±5% tolerance on specified dimensions)
• Specialized thread profiles (API, NPT, R threads)
• Surface treatment modifications (cryogenic hardening, laser cladding)

6. Case Study Validation

In a metallurgical mine project (Western China), T45 rods demonstrated:

• 22% reduction in drilling time compared to conventional D级 rods
• 35% extended service life through optimized fatigue resistance design
• Improved directional control in inclined drilling (azimuthal deviation < 0.8°)

7. Technical Performance Summary

The T45 extension rod system provides comprehensive solutions for demanding drilling operations through its:

• Material science-optimized engineering structure
• Parametrically controllable dimensional specifications
• Environment-adaptive performance characteristics

This product has been certified by:

• China Quality Certification Centre (CQC)
• International Organization for Standardization (ISO 9001)
• American Petroleum Institute (API 5CT)

For technical consultation and customized drilling solutions, please contact our engineering team at [contact information].