BQ,NQ Drill pipes

Product details

ProDrill drill rods are suitable to drill deep holes. They are widely used in geological and mineral, metallurgy, mining, oil drilling industries and so on. ProDrill has many years experience in manufacturing coring drill rod, we try to provide you the most cost-efficient products size as per Boart Long Year spec.

BQ Drill pipes Technical parameter table

DESCRIPTION	OD (mm)	ID (mm)	WEIGHT（kg/3m)	THREAD SPITCH (mm)	PIN LENGTH(mm)	CONTENT(L/100 m)
ROD, BQ 3.0 m ENHANCED
ROD, BQ 1.5 m ENHANCED	55.60	46.10	18.00	8.5	44.45	167.00
ROD, BQ 1.0 m

NQ Drill pipes Technical parameter table

DESCRIPTION	OD (mm)	ID (mm)	WEIGHT（kg/3m)	THREAD SPITCH (mm)	PIN LENGTH(mm)	CONTENT(L/100 m)
ROD, NQ 3.0 m ENHANCED
ROD, NQ 1.5 m ENHANCED	69.90	60.30	23.40	8.5	44.45	286.00
ROD, NQ 1.0 m

Features of Drill Rod
1. Made of high quality alloy steel.
2. All our drill rods are heat-treated.
3. Reasonable structure, reliable performance and high using efficiency.
4. Good concentricity, high precision and long service life.

High-frequency quenching of the BQ thread (usually the male end) of core drill pipe is a targeted, localized surface heat treatment process. Its core purpose is to significantly improve the surface hardness and wear resistance of the thread, preventing "sticking" and premature wear caused by intense friction and impact during drilling.

Key Quenching Indicators

· Surface Hardness: ≥ 50 HRC

· Hardened Layer Depth: 0.5 - 2.5 mm

· Typical Cooling Method: Water cooling or polymer-based water-based quenching fluid

· Deformation Prevention Measures: Optimized coil, preheating, or stress relief treatment

· Key Implementation Points:

· High-Precision Machining: The thread should be precision machined by CNC machine tools before quenching to ensure a uniform quenched layer.

· Induction Coil Design: Custom-designed contour coils to ensure uniform heating of the thread crest and flanks.

· Timely Tempering: Low-temperature tempering should be performed immediately after quenching to eliminate internal stress, stabilize the microstructure, and prevent delayed cracking.

• Quality inspection: Random sampling is conducted using hardness testers, metallographic microscopes, etc., to ensure stable quality.

BQ, NQ drill pipe loading picture