Down the hole drill rods, DTH drill rods

• Product description：DTH drill rods (also called as drill tubes or drill pipes) are the mechanism to transmit impact force and rotation torque to DTH hammer and DTH bit, as well as offer pass for the air flow.

Outer Diameter (mm)		Length (mm)		Wall Thickness (mm)	Connection Thread		Wrench Flat
inch	mm
3	76	1000-6000		5.00	2 3/8" API REG		57/64.5
3	76	1000-6000		6.00	2 3/8" API REG		57/64.5
3	76	1000-6000		8.00	2 3/8" API REG		57/64.5
3 1/2	89	1000-6000		6.00	2 3/8" API REG		64/70
3 1/2	89	1000-6000		8.00	2 3/8" API REG		64/70
3 1/2	89	1000-6000		10.00	2 3/8" API REG		64/70
4	102	1000-9000		8.00	2 7/8" API REG		76/89
4	102	1000-9000		10.00	2 7/8" API REG		76/89
4 1/2	114	1000-9140		6.00	3 1/2" API REG		89/95
4 1/2	114	1000-9140		8.00	3 1/2" API REG		89/95
4 1/2	114	1000-9140		10.00	3 1/2" API REG		89/95
4 1/2	114	1000-9140		12.00	3 1/2" API REG		89/95
4 1/2	114	1000-9140		18.00	3 1/2" API REG		89/95
5	127	1000-9140		10.00	3 1/2" API REG		89
5	127	1000-9140		12.00	3 1/2" API REG		89
5	127	1000-9140		14.00	3 1/2" API REG		89
5	127	1000-9140		18.00	3 1/2" API REG		89
5 1/2	140	1000-9140		9.00	4 1/2" API REG		114
5 1/2	140	1000-9140		10.00	4 1/2" API REG		114
5 1/2	140	1000-9140		12.00	4 1/2" API REG		114
5 1/2	140	1000-9140		18.00	4 1/2" API REG		114
2 3/8" API REG - 2 3/8" API REG			2 7/8" API REG - 2 7/8" API REG			3 1/2" API REG - 3 1/2" API REG
2 3/8" API REG - 2 7/8" API REG			2 7/8" API REG - 3 1/2" API REG			3 1/2" API REG - 4 1/2" API REG
2 3/8" API REG - 3 1/2" API REG			2 7/8" API REG - 4 1/2" API REG			4 1/2" API REG - 4 1/2" API REG

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DTH drill rods (also called as drill tubes or drill pipes) are the mechanism to transmit impact force and rotation torque to DTH hammer and DTH bit, as well as offer pass for the air flow. Guizhou Vilong supplies a full size of friction welded DTH drill rods from 76mm to 140mm with different wall thickness.

In DTH drilling, the percussive DTH hammer is located behind the drill bit, inside the hammer, a piston powered by compressed air gives the drill bit its striking power, while the DTH hammer casing gives guidance to the drill bit; the drill string rotates while the drilling hammer continuously strikes down into the rock. The DTH drill rods transmit the necessary feed force and rotation to the DTH hammer and bit, as well as compressed air for the DTH hammer, more dth drill rods are added to the top of the drill string as the hole gets deeper. The fast hammer impact breaks hard rock into small particles, which are blown up by the air exhaust from the DTH hammer.