1.independent intellectual property rights drill pipe 2.Two grades of rods vary in performance and price

Specification of drill pipe:

1, the same standard products and foreign exchange. 2, drill pipe with high precision and strength of geological materials the highest level of domestic steel grade, using the same level with advanced heat treatment process, thread machining accuracy of the foreign advanced level. 3, the high cost performance compared with foreign products.

Drill Type	Drill, reamer standard	Dual standards of Drilling and Fishing tools	Drill Specifications	Deep hole drilling tool design (m)	Core diameter (drill diameter) mm
			(Diameter * thickness) mm
BQ,BO	BQ	BQ,BO	Φ55.5*4.75	1250	Φ36.3
NQ,NO	NQ	NQ,NO	Φ70.1*5.05	1000	Φ47.6
			(Φ71*5.5)
HQ,HO	HQ	HQ,HO	Φ89*5.6	700	Φ63.5
PQ,PO	PQ	PQ	Φ114.3*6.3	600	Φ85

Direct foreign standards with rope drill