Drill Pipe

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Drill pipe plays a decisive role in the process of drilling, it transfered the drilling torque to drill bit, in order to drilling under the well. When it is drilling,drill pipe has complicated load, at the same time it is subjected to stress such as pulling,pressing,torsion and bending, and drill pipe string itself is an elastic system, drilling fluid in the process of drilling and the vibration of the drilling string makes the drill pipe under a great load.

Drill Pipe Type:

E75、X95、G105、S135.

chemical composition

Technical Parameters:

Specification	Nominal weight	Flat end weight		Outer diameter O.D.		Wall thickness		Steel grade	Upset end for weld-on drill pipe joint
Specification	Nominal weight	lb/ft	kg/m	in	mm	in	（Ton）mm	Steel grade	Upset end for weld-on drill pipe joint
2 3/8	6.65	6.27	9.33	2.375	60.3	0.28	7.11	E, X, G, S	EU
2 7/8	10.4	9.72	14.47	2.875	73	0.362	9.19	E, X, G, S	IU/EU
3 1/2	9.5	8.81	13.12	3.5	88.9	0.254	6.45	E	IU/EU
3 1/2	13.3	12.32	18.34	3.5	88.9	0.368	9.35	E, X, G, S	IU/EU
3 1/2	15.5	14.64	21.79	3.5	88.9	0.449	11.4	E	IU/EU
3 1/2	15.5	14.64	21.79	3.5	88.9	0.449	11.4	X, G, S	IU/EU
4	14	12.95	19.27	4	101.6	0.33	8.38	E, X, G, S	IU/EU
4 1/2	13.75	12.25	18.23	4.5	114.3	0.271	6.88	E	IU/EU
4 1/2	16.6	15	22.32	4.5	114.3	0.337	8.56	E, X, G, S	EU/IEU
4 1/2	20	18.71	27.84	4.5	114.3	0.43	10.92	E, X, G, S	EU/IEU
5	16.25	14.88	22.16	5	127	0.296	7.52	X, G, S	IU
5	19.5	17.95	26.7	5	127	0.362	9.19	E	IEU
5	19.5	17.95	26.7	5	127	0.362	9.19	X, G, S	EU/IEU
5	25.6	24.05	35.8	5	127	0.5	12.7	E	IEU
5	25.6	24.05	35.8	5	127	0.5	12.7	X, G, S	EU/IEU
5 1/2	21.9	19.83	29.52	5.5	139.7	0.361	9.17	E, X, G, S	IEU
5 1/2	24.7	22.56	33.57	5.5	139.7	0.415	10.54	E, X, G, S	IEU
6 5/8	25.2	22.21	33.04	6.625	168.3	0.33	8.38	E, X, G, S	IEU
6 5/8	27.72	24.24	36.06	6.625	168.3	0.362	9.19	E, X, G, S	IEU

Mechanical Property of Friction Welding Zone		Yield Strength	Tensile Strength	Elongation	Guided Bend	Impact Energy（Akv）	HRC
Item		Yield Strength	Tensile Strength	Elongation	Guided Bend	Impact Energy（Akv）
Item		MPa	MPa	%		J
Standard	Steel Grade	Tensile Test Piece：￠12.5； Impact specimen：10×10 Charpy -V、20℃
SY/T5561-92 Welding area Regulations	E-75	≥517	≥689	≥13	/	Average≥20 Mini. value≥15	/
	X-95	≥609	≥712		/		/
	G-105	≥655	≥724		/		/
	S-135	≥724	≥793		/		/
API Welding area Regulations	E-75	≥609	≥712		Bending plane cracks in any direction≤3.175mm	Average≥27 Mini. value≥23	HAZ内HRC≤37
	X-95	≥655	≥724
	G-105	≥724	≥793
	S-135	≥392 778 793	≥421 1000
API Pipe Body Regulations	E-75	≥517 ≤724	≥689		/	Average≥54 Mini. value≥47	/
	X-95	≥655 ≤862	≥724
	G-105	≥724 ≤931	≥793
	S-135	≥931 ≤1138	≥1000

Welding Drill Pipe Parameters list (According to API standard)
O.D.		Wall Thickness		Pipe Body Upsetting	Grade	Drill Pipe Length（m）			Joint O.D.	Thread Type	I.D.of External Thread Joint	Weight
inch	mm	inch	mm	Pipe Body Upsetting	Grade	Range1	Range2	Range3	Joint O.D.	Thread Type	I.D.of External Thread Joint	kg/m
2-3/8	60.32	0.280	7.11	EU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	85.7	NC26	44.5	15.8
2-7/8	73.02	0.362	9.19	EU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	104.8	NC31	50.8	24.6
2-7/8	73.02	0.362	9.19	EU	S	6.40-7.62	9.14-10.36	12.19-14.63	111.1	NC31	41.3	26.7
3-1/2	88.90	0.368	9.35	EU	G	6.40-7.62	9.14-10.36	12.19-14.63	127.0	NC38	61.9	32.6
3-1/2	88.90	0.368	9.35	EU	S	6.40-7.62	9.14-10.36	12.19-14.63	127.0	NC38	54.0	33.1
3-1/2	88.90	0.449	11.40	EU	G	6.40-7.62	9.14-10.36	12.19-14.63	127.0	NC38	54.0	37.8
3-1/2	88.90	0.449	11.40	EU	S	6.40-7.62	9.14-10.36	12.19-14.63	139.7	NC40	57.2	39.0
4	101.60	0.330	8.38	IU	G	6.40-7.62	9.14-10.36	12.19-14.63	139.7	NC40	61.9	35.2
4	101.60	0.330	8.38	IU	S	6.40-7.62	9.14-10.36	12.19-14.63	139.7	NC40	50.8	35.8
4	101.60	0.330	8.38	EU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	152.4	NC46	82.6	35.9
4	101.60	0.330	8.38	EU	S	6.40-7.62	9.14-10.36	12.19-14.63	152.4	NC46	76.2	36.4
4-1/2	114.30	0.337	8.56	EU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	95.3	41.8
4-1/2	114.30	0.337	8.56	EU	S	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	88.9	42.4
4-1/2	114.30	0.430	10.92	EU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	88.9	50.1
4-1/2	114.30	0.430	10.92	EU	S	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	76.2	51.1
4-1/2	114.30	0.337	8.56	IEU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	158.8	NC46	76.2	41.3
4-1/2	114.30	0.337	8.56	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	158.8	NC46	69.9	41.8
4-1/2	114.30	0.430	10.92	IEU	G	6.40-7.62	9.14-10.36	12.19-14.63	158.8	NC46	63.5	50.6
4-1/2	114.30	0.430	10.92	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	158.8	NC46	57.2	51.0
5	127.00	0.362	9.19	IEU	G	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	82.6	49.1
5	127.00	0.362	9.19	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	69.9	50.0
5	127.00	0.362	9.19	IEU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	177.8	5 1/2FH	95.3	50.1
5	127.00	0.362	9.19	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	184.2	5 1/2FH	88.9	51.2
5	127.00	0.500	12.70	IEU	G	6.40-7.62	9.14-10.36	12.19-14.63	168.3	NC50	69.9	62.7
5	127.00	0.500	12.70	IEU	G	6.40-7.62	9.14-10.36	12.19-14.63	184.2	5 1/2FH	88.9	64.6
5	127.00	0.500	12.70	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	184.2	5 1/2FH	82.6	65.2
5-1/2	139.70	0.362	9.19	IEU	G	6.40-7.62	9.14-10.36	12.19-14.63	184.2	5 1/2FH	88.9	56.0
5-1/2	139.70	0.362	9.19	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	190.5	5 1/2FH	76.2	58.5
5-1/2	139.70	0.415	10.54	IEU	X、G	6.40-7.62	9.14-10.36	12.19-14.63	184.2	5 1/2FH	88.9	61.5
5-1/2	139.70	0.415	10.54	IEU	S	6.40-7.62	9.14-10.36	12.19-14.63	190.5	5 1/2FH	76.2	64.0
Note: 1. The IU EU IEU is internal upset,external upset and internal-external upset. 2.The thread has a right-handed left rotation and copper plating or phosphating 3. This table is used for steel drill pipe, and lower steel grade drill pipe can also be supplied

Drill pipe production advantage:

Using the current domestic and foreign advanced heat treatment technology of friction welding deformation, it has small heat affected zone, after welding the stress transition region is more easy to eliminate. Strictly implement the process evaluation of welding deformation heat treatment standard and optimized parameter, to ensure the welding quality is better, more stable and reliable.