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For OD 50-89mm, we produce forged one piece drill rod. - details see: https://www.machineto.com/hdd-drill-rod-s135-10149365

drill rod

Bitmap Size	Dimension				Thread form	Material	Minimum bending radius (m)	Length of the rod to bend 90° (m)	Max angle(°s)	Torque KN.m
	OD (mm)	Thickness (mm)	Length (m)	OD of the joints (mm)
50 (2")	50	6.5	2	57	DH50	G105	38	60	3.0°	2.9
			2.5			S135	30	47.1	4.8°	3
60.3 (2 3/8")	60.3	7.5	2	67	DH60	G105	42	66	2.7°	6
			3			S135	33	51.8	5.2°	6.3
73 (2 7/8")	73	8	3	80	DH23	G105	58	91.1	3.0°	12
			4			S135	45	70.7	3.8°	13
73 (2 7/8")	73	10	3	87	DH26	G105	67	105	2.6°	14.5
			4			S135	51	80	4.5°	16
83 (3 1/4")	83	9	3	92	DH26	G105	73	114.7	2.4°	16.8
			4.5			S135	65	102.1	4.0°	18
89(3 1/2")	88.9	10	4.5	104	DH31	G105	80	125.7	3.2°	22.3
			6			S135	72	113	4.8°	24
102 (4")	101.6	8.38	6	127	NC38	G105	90	141.4	3.8°	25
						S135	80	125.7	4.3°	27
114 (4 1/2")	114.3	8.56	6	158.8	NC46	G105	93	146	3.7°	27
			9.6			S135	104	163.4	5.0°	32
		10.92	6	168.28	NC50	G105	100	157	3.4°	30.8
			9.6			S135	90	141.4	6.1°	36.5
127 (5")	127	9.19	6	168.28	NC50	G105	106	166.5	3.2°	45
			9.6			S135	95	149.2	5.8°	50
		12.7	6	184.15	5 1/2FH	G105	113	177.5	3.0°	55.8
			9.6			S135	100	157	5.2°	66.5
140 (5 1/2")	139.7	9.17	6	184.15	5 1/2FH	G105	118	185.4	2.9°	103
			9.6	190.5		S135	105	165	5.2°	110
		10.54	6	184.15		G105	124	194.8	2.8°	112
			9.6	190.5		S135	110	172.8	5.0°	120
168 (6 5/8")	168.3	8.38	6	209.55	6 5/8FH	G105	130	204.2	2.6°	153
			9.6	215.9		S135	116	182.2	4.7°	155
		9.19	6	209.55		G105	148	232.5	2.3°	163
			9.6	215.9		S135	132	207.3	4.2°	165

Thread form and the length of drill pipe can be manufactured in accordance with user requirements.