China NQ-HQ-PQ Drill Rods Drill Pipes Manufacturers, Factories

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China NQ-HQ-PQ Drill Rods Drill Pipes Manufacturers, Factories

All rods longer than 5 ft/1.5 m are heat treated for better wear resistance in all drilling applications.

Manufactured to strict quality standards. We control and verify every rod thread and adapter we make.

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Product Description

Key Features of Our Geological Drill Rods

Enhanced Durability
Case hardening on rods end protects thread connection and increases its wear resistance and rod life.

Deep Hole Performance
Our wire-line rods are specifically designed and suitable for demanding deep hole drilling projects.

Chemical Heat Treatment
Advanced technology that increases thread wear resistance by dozens of times compared to standard rods.

Standard effective lengths are 3 meters, with custom lengths available upon special request. We leverage years of manufacturing experience to ensure all products are cost-efficient and maintained in large stock for rapid supply.

Premium Manufacturing Process

Our drill rods and casings are manufactured using premium quality cold drawn seamless tubes. We utilize high-technology CNC machines and top-tier diamond core drilling tools to ensure precision and reliability.

Upsetting Technology: By using tubes with larger internal diameters and increasing wall thickness at both ends for threading, we produce "upsetted" drill rods. This results in:

Significantly lighter total weight.
Drill rig depth capacity increased by up to 30%.
More durable and resistant threads through specialized heat treatment.

Technical Specifications: NQ-HQ-PQ Series

TYPE	Outer Dia (mm)	Internal Dia (mm)	Thickness (mm)	Length (m)
NQ	69.9	60.3	5	3
HQ	88.9	77.8	5.5	3
PQ	114.3	103.2	5.5	3

Frequently Asked Questions

Q1: What are the benefits of case hardening on drill rods?

Case hardening protects the thread connections from premature wear, significantly extending the service life of the rods in harsh geological conditions.

Q2: Are these rods suitable for deep hole drilling?

Yes, our wire-line rods are engineered specifically to handle the stresses and requirements of deep hole diamond core drilling.

Q3: Can I order drill rods in lengths other than 3 meters?

While our standard effective length is 3 meters, we can manufacture custom lengths based on your specific project requirements.

Q4: How does upsetting technology improve drilling efficiency?

Upsetting increases the wall thickness at the ends for stronger threads while keeping the main body lighter. This can increase a rig's depth capacity by up to 30%.

Q5: What materials are used in the manufacturing process?

We use premium quality cold drawn seamless alloy steel tubes to ensure excellent tensile strength and elongation characteristics.

Q6: How does chemical heat treatment affect the thread?

The treatment creates a much tougher surface on the threads, making them dozens of times more resistant to wear during repeated connection and disconnection.