DTH Drill Pipe

It is mainly used in rock drilling and crushing, anchoring drilling, geothermal air conditioning holes, water well drilling, etc. The pipe body is made of materials produced by well-known large-scale iron and steel enterprises in China. The two ends of the pipe body are internally thickened, tempered after friction welding, quenched and tempered after rough machining of drill pipe joints, phosphating and nitriding after finishing. It effectively eliminates the failure probability of gluing, broken buckles, outer diameter swelling and cracking, is more wear-resistant and easy to disassemble. All threads are processed by precision numerical control lathes with customized forming knives. All threads are equipped with thread gauges conforming to international standards. Therefore, the quality of drill pipes produced is stable and reliable, and the service life is greatly prolonged.

Drill pipe diameter		Thread model	Steel grade	Rod wall thickness	Thickened form	Drill pipe length
inch	mm			mm		mm
3	76	2-3/8"REG	R780、G105、S135	4-8	upset	1000--6000
31/2	89	23/8"IFNC26	R780、G105、S135	4-10	upset	1000--6000
4	102	27/8"IFNC31	R780、G105、S135	8-10	upset	1000--9000
41/4	108	27/8"IFNC31	R780、G105、S135	8-10	upset	1000--9000
41/2	114	NC35	R780、G105、S135	6-12	upset	1500--9000
5	127	31/2"IF NC38	R780、G105、S135	9-12	upset	1500--9000
5.5	140	4"IF NC46	R780、G105、S135	8-20	upset	1500--9000

We can produce down the hole drill rods/outer flat drill rods with different materials, lengths, diameters, and wall

thicknesses, as well as customize drill rods according to customer requirements for materials, lengths, wall thicknesses, and threads.

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