In the fields of oil exploration, coal mining, and geological drilling, the strength, toughness, and wear resistance of drill rods are crucial indicators affecting operational safety and production efficiency. Based on years of experience in medium-frequency induction heating systems, Hebei Yuantuo Electromechanical Equipment Manufacturing Co., Ltd. has developed an automated drill rod heat treatment production line, which integrates induction heating with quenching and tempering to ensure stable processing and high-quality product performance.

1. Wide Application Range for Drill Rods and Long Shaft-Type Components

The production line is designed using electromagnetic induction heating and integrates material feeding, heating, quenching, tempering, and unloading into a fully automated continuous process. It is suitable for:

• Oil drill rods, drill collars

• Geological drilling rods, coal drilling rods

• Sucker rods

• Hydraulic support rods, single prop rods

• Cylinder rods, piston rods

• Round bars, shafts, pins, and other long bar products

• Medium-frequency quenching and tempering of various steel pipes and shafts

This system is widely applied in petroleum, mining, machinery manufacturing, and steel processing industries, providing a reliable heat-treatment solution for a variety of long workpieces.

2. Advanced Heat Treatment Process: Quenching + Tempering

The entire production line adopts medium-frequency induction heating for both quenching and tempering.

• Quenching temperature: approx. 927°C

• Tempering temperature: approx. 650°C

Through rapid induction heating and precise temperature control, the surface of the drill rod obtains a hardened layer with high strength, while the core retains good toughness—ensuring excellent resistance to torque, fatigue, and impact under harsh downhole conditions.

3. Continuous Automated Production Workflow

The production line is designed for stable, continuous, and automated operation.

Quenching Process

Overhead crane → Loading platform → Automatic loading system → Infeed rollers → Induction quenching heater → Outfeed rollers → Water spray → Quenching complete

Tempering Process

Infeed rollers → Induction tempering heater → Outfeed rollers → Tempering complete → Automatic unloading → Unloading platform → Overhead crane

The entire workflow supports uninterrupted production and can integrate with MES or plant digital systems.

4. Key Technical Features

1) Uniform Heating & High Temperature Accuracy

PLC + industrial computer + infrared pyrometer enable:

• Pre-set temperature curves

• Real-time PID power adjustment

• Stable metallurgical structure

2) High Automation Level

The system supports batch loading, continuous feeding, auto quenching/tempering, and automatic unloading with minimal labor involvement.

3) High Power Efficiency & Wide Voltage Adaptability

Yuantuo’s MF power supplies feature high power factor, wide operating voltage range, and energy-efficient design.

4) Fast Start-up

The power system reaches full output within 0.1 seconds, improving production rhythm.

5) High Reliability

Designed for 24-hour continuous operation, suitable for high-throughput environments.

6) Real-time Energy & Process Monitoring

The system records:

• Voltage, current, power

• Quenching water flow & temperature

• Historical process data

Data export supports process optimization, quality tracking, and production traceability.

5. Conclusion：A Reliable Solution for High-Performance Drill Rod Processing

Through intelligent induction heating technology and automated continuous processing, Yuantuo’s drill rod heat treatment production line helps factories achieve:

• Stable & consistent heat treatment quality

• Higher production efficiency

• Digital and traceable process control

• Drill rods with improved durability and mechanical performance

Yuantuo will continue to provide customized, upgradable solutions for oilfield equipment, mining components, and industrial heat-treatment applications—supporting high-quality development in the global energy equipment industry.