Bq Nq Hq Pq Drill Rods

BQ, NQ, HQ, PQ are common drill pipe specifications used for work such as geological exploration and rock drilling. These specifications represent the diameter of the drill pipe and the type of drill pipe thread.

The BQ drill pipe is the smallest diameter specification, with a diameter of 36 mm (1.42 in) and is suitable for work such as shallow geological exploration and water well drilling.

With a diameter of 47.6 mm (1.88 in), the NQ drill pipe is suitable for medium depth geological exploration and rock drilling.

HQ drill pipe diameter is 63.5 mm (2.5 in), suitable for deeper geological exploration and rock drilling.

The PQ drill pipe has a diameter of 85 mm (3.35 in) and is suitable for deep geological exploration and rock drilling.

These drill pipes are typically made of high-strength alloy steel with high wear and corrosion resistance. The drill pipe thread is usually API thread standard to ensure that the drill pipe is compatible with other Drilling Tools and equipment.

BQ, NQ, HQ, PQ drill pipe is widely used in geological exploration and rock drilling, and can be used to obtain underground rock and soil samples for geological analysis and resource exploration. The selection of these drill pipe specifications depends on the specific drilling requirements and geological conditions.

Core Barrel Overshot
Core Barrel&Overshot
Drill Extension Rod
Drilling Rod

Spec.	Unit	BCB	NCB	HCB	PCB
OD/ID	mm	55.6/46	71/60	89/77.8	114.3/101.6
Thickness	mm	4.8	5.5	5.6	6.35
Length	m	1.5 or 3	1.5 or 3	1.5 or 3	1.5 or 3
Weight	kg/m	6.01	8.8	11.51	17.3
Thread Length	mm	44.45	44.45	44.45	63.5
Thread Pitch	thread/inch	3	3	3	2.5
Box Thread Tooth Height	mm	0.76	0.76	0.76	1.17
Pin Thread Tooth Height	mm	0.88	0.88	0.88	1.27
Thread Tooth Angle	.	29	29	29	29
Tensile Resistance(A Series)	kn	400	530	510	565
Tensile Resistance(B Series)	kn	450	615	625	660
Bore Depth	m	1200	1000	900	800