The outer and inner diameter welded gates are removed by shearing and machining. Perform post-weld heat treatment on the heat-affected zone between the drill pipe upsetting and the tool joint to restore the performance of the welded zone. Post-weld heat treatment is a quenching and tempering process. Through this process, the weld zone first reaches the austenitizing temperature, and then the polymer is quenched. Then, an area wider than the weld zone is reheated to the tempering temperature by induction. Each post-weld heat treatment will be monitored and recorded to form a comprehensive strip chart. Perform a 100% hardness inspection on each weld to confirm that they are fully tempered. The post-weld heat treatment process continues to produce stronger, tougher, more uniform welding performance and ideal microstructures to maximize resistance to stress and fatigue.

For each drill pipe component, from raw materials to all manufacturing completion, complete product and process traceability is maintained. For pin and box tool joints, the unified cutting test certificate is confirmed by the incoming material test. Each tool joint has a unique product number, which provides the traceability of the entire manufacturing process. The same procedure applies to pipeline traceability.

The surface near the weld is smooth on both the outer and inner diameters. Precision machining and grinding provide a surface finish without stress rise. We use wet magnetic powder and ultrasonic inspection technology to perform 100% inspection on each welding area. Destructive tests such as tensile, yield, impact and bending tests of welding coverings are carried out for each specification batch and recorded.

Product specifications

1) Product size: all specifications from 2-3/8" to 6-5/8"

2) Product steel grade: E75; X95; G105 and S135

3) Product length: R1 R2 R3

4) Thickened form: IU EU IEU

5) Thread type: from NC23 to NC50, 5-1/2”FH, 6-5/8”FH

6) Specification level: API 5DP; API 7-2, API RP7G; NS-1

Product quality control

1) 100% ultrasonic full length inspection of drill pipe body inspection rate;

2) 100% of the joints and weld areas adopt ultrasonic and magnetic particle inspection

3) Thickened transition zone MiuN 140mm: Miu-R>300mm reduces the stress concentration at the disappearance of the internal thickened transition zone and improves fatigue performance.

Performance of high cost-performance drill pipe

1) Joint up and down test, joint thread cold rolling

2) Wear belt: ARNCO 100 XT, 150 XT, 300 XT, 350 XT, Tuboscope TCS 8000x TCS Titanium, Duraband

3) Inner coating: DPC, TK34L, TK34P, TC2000

4) To meet stringent drilling conditions, high-performance drill pipes other than API PSL-1 & PSL-2 can be produced, including but not limited to API 5DP PSL-3, NS-K DS-1 or customized according to customer special requirements

Detection flow chart

1603351218(1).jpg

2 3/8"-2 7/8"

No	Size OD		Nominal Weight(PPF)	Grade and upset type	Wall Thickness		Nominal ID	Pipe Body Section Area	Connection Type	Outside Diameter	Inside Diameter	Make-Up Torque	Torsional Ratio Tool Joint to Pipe	Pin Tong Space	Box Tong Space	Adjusted Weight
	In	mm	Ib/ft	Upset Type	in	mm	in	Sq/in	Type	in	in	ft-lb	Joint to Pipe	in	in	Ib/ft	kg/m
1	2 3/8	60.30	6.65	E-75 EU EU	0.280	7. 11	1.815	1.843	NC26	3 3/8	1 3/4	3900	1.10	9	10	7.17	10.68
2	2 3/8	60.30	6.65	X-95 EU EU	0.280	7.11	1.815	1.843	NC26	3 3/8	1 3/4	3900	0.87	9	10	7.17	10.68
3	2 3/8	60. 30	6.65	G-105 EU EU	0.280	7. 11	1.815	1.843	NC26	3 3/8	1 3/4	3900	0. 78	9	10	7.17	10.68
4	2 3/8	60.30	6.65	S-135 EU EU	0.280	7.11	1.815	1.843	NC26	3 5/8	1 1/2	4900	0.80	9	10	7.62	11.35
5	2 7/8	73.00	6.85	E-75 IU IU	0.217	5.51	2.441	1.812	NC26	3 3/8	1 3 4	3900	0.85	9	10	7.19	10.71
6	2 7/8	73.00	6.85	E-75 EU EU	0.217	5.51	2.441	1.812	NC31	41/8	2 5/32	6200	1.42	9	11	7. 88	11.74
7	2 7/8	73.00	6.85	X-95 IU IU	0.217	5.51	2. 441	1.812	NC26	3 1/2	1 1/2	4900	0.86	9	10	7. 50	11.17
8	2 7/8	73.00	6.85	X-95EU EU	0.217	5.51	2. 441	1.812	NC31	4 1/8	2 5/32	6200	1.13	9	11	7. 88	11.74
9	2 7/8	73.00	6.85	G-105IU IU	0.217	5.51	2. 441	1.812	NC26	3 5/8	1 3/4	3900	0. 64	9	10	7. 46	11.11
10	2 7/8	73.00	6.85	G-105EU EU	0.217	5.51	2. 441	1.812	NC31	4 1/8	2 5/32	6200	1.02	9	11	7. 88	11.74
11	2 7/8	73. 00	6.85	S-135IU IU	0.217	5.51	.2. 441	1.812	NC26	3 5/8	1 1/2	4900	0. 62	9	10	7. 64	11.38
12	2 7/8	73. 00	6. 85	S-135EU EU	0.217	5.51	2.441	1.812	NC31	4 1/8	2 1/8	6400	0.82	9	11	7.91	11.78
13	2 7/8	73. 00	10. 40	E-75EU EU	0.362	9.19	2.151	2.858	NC31	4 1/8	2 1/8	6400	1.03	9	11	11.14	16. 59
14	2 7/8	73.00	10. 40	E-75EU EU	0.362	9.19	2.151	2.858	NC26	3 1/2	1 1/2	4900	0.76	9	10	10. 79	16.07
15	2 7/8	73. 00	10. 40	X-95EU EU	0.362	9.19	2.151	2.858	NC31	4 1/8	2	7100	0.90	9	11	11.27	16. 79
16	2 7/8	73. 00	10. 40	X-95IU IU	0.362	9.19	2. 151	2.858	NC26	3 1/2	1 1/2	4900	0.60	9	10	10. 76	16.03
17	2 7/8	73. 00	10. 40	G-105EU EU	0. 362	9.19	2.151	2. 858	NC31	4 1/8	2	7100	0.81	9	11	11.27	16. 79
18	2 7/8	73. 00	10. 40	G-105IU IU	0. 362	9.19_	2.151	2.858	NC26	3 1/2	1 1/2	4900	0.54	9	10	10. 76	16.03
19	2 7/8	73. 00	10. 40	S-135EU EU	0. 362	9.19	2.151	2.858	NC31	4 1/8	2	7100	0. 63	9	11	11.29	16. 82
20	2 7/8	73. 00	10.40	S-135IU IU	0.362 1	9.19	2.151	2.858	NC26	3 5/8	1 1/2	4900	0.43	9	10	10. 90	16. 24

3 1/2"

No.	DRILL PIPE TABLES																		Tool Joint Data													Assembly Data
	Size OD				Nominal Weight(PPF)	Grade and upset type			Wall Thickness				Pipe Body Nominal ID Section Area					Connection Type		Outside Diameter		Inside Diameter		Make-Up Torque		Torsional Ratio Tool Joint to Pipe		Pin Tong Space		Box Tong Space	Adjusted Weight
		In		mm	Ib/ft	Upset Type		in				mm			in	Sq/in		Type	in		in		ft-lb		Joint to Pipe		in		in		Ib/ft		kg/m
21	3 1/2		88.90		9.50		E-75 EU			0.254	6.45			2.992			2.590	NC38		4 3/4		2 11/16		9700		1.28		10		12.5	11.07	16.49
22	3 1/2		88.90		9.50		E-75 IU			0.254	6.45			2.922			2.590	NC31		41/8		2 1/8		6400		0.84		9		11	10.49	15.62
23	3 1/2		88.90		9. 50		X-95 EU			0.254	6.45			2.922			2. 590	NC38		4 3/4		2 11/16		9700		1.01		10		12.5	11.07	16.49
24	3 1/2		88.90		9. 50		X-95 IU			0.254	6.45			2.922			2. 590	NC31		4 1/8		2		7100		0. 74		9		11	10.61	15.80
25	3 1/2		88.90		9. 50		G-105 EU			0.254	6.45			2.922			2. 590	NC38		4 3/4		2 11/16		9700		0.91		10		12.5	11.07	16.49
26	3 1/2		88.90		9. 50		G-105 IU			0.254	6.45			2.922			2. 590	NC31		41/8		2		7100		0.67		9		11	10.61	15.80
27	3 1/2		88.90		9. 50		S-135 EU			0.254	6.45			2.922			2. 590	NC38		4 7/8		2 9/16		10700		0. 79		10		12.5	11.45	17. 05
28	3 1/2		88.90		9. 50		S-135 IU			0.254	6.45			2.922			2. 590	NC31		4 1/8		2		7100		0. 52		9		11	10.61	15.80
29	3 1/2		88.90		13. 30		E-75 EU			0. 368	9. 35			2. 764			3.621	NC38		4 3/4		2 11/16		9700		0.97		10		12.5	14. 24	21.21
30	3 1/2		88.90		13. 30		E-75 IU			0. 368	9. 35			2.764			3.621	NC31		4 1/8		2		7100		0.71		9		11	13.93	20.75
31	3 1/2		88.90		13. 30		X-95 EU			0. 368	9. 35			2. 764			3.621	NC38		5		2 9/16		10700		0.86		10		12.5	14.84	22.10
32	3 1/2		88.90		13. 30		X-95 IU			0. 368	9.35			2. 764			3.621	NC31		4 1/8		2		7100		0. 56		9		11	13.93	20.75
33	3 1/2		88.90		13. 30		G-105 EU			0. 368	9. 35			2. 764			3.621	NC38		5		2 7/16		11700		0.85		10		12.5	15. 00	22. 34
34	3 1/2		88.90		13. 30		G-105 IU			0. 368	9.35			2. 764			3.621	NC31		4 1/8		2		7100		0.51		9		11	13.93	20.75
35	3 1/2		88.90		13. 30		S-135 EU			0. 368	9. 35			2. 764			3.621	NC38		5		2 1/8		14000		0. 79		10		12.5	15. 37	22.89
36	3 1/2		88.90		13. 30		S-135 IU			0. 368	9.35			2. 764			3.621	NC31		4 1/8		2		7100		0.40		9		n	13.93	20.75
37	3 1/2		88.90		15. 50		E-75 EU			0.449	11.40			2.602			4. 304	NC38		5		2 9/16		10700		0.96		10		12.5	16.94	25. 23
38	3 1/2		88.90		15. 50		X-95 EU			0.449	11.40			2.602			4. 304	NC38		5		2 7/16		11700		0.83		10		12.5	17.11	25.49
39	3 1/2		88.90		15. 50		G-105 EU			0.449	11.40			2.602			4. 304	NC38		5		2 1/8		14000		0.90		10		12.5	17. 50	26. 07
40	3 1/2		88.90		15. 50		G-105 EU			0.449	11.40			2.602			4. 304	NC40		5 1/4		2 9/16		14600		0.94		9		12	17.24	25.68
41	3 1/2		88.90		15. 50		S-135 EU			0.449	11.40			2.602			4. 304	NC38		5		2 1/8		14000		0. 70		10		12.5	17. 50	26. 07
42	3 1/2		88.90		15. 50		S-135 EU			0.449	11.40			2.602			4. 304	NC40		5 1/2		2 1/4		17100		0.87		10		12.5	18.31	27.27

4 1/2"

No.	DRILL PIPE TABLES																			Tool Joint Data
	Size OD				Nominal Weight(PPF)		Grade and upset type				Wall Thickness				Pipe Body Nominal ID Section Area					Connection Type		Outside Diameter			Inside Diameter			Make-Up Torque			Torsional Ratio Tool Joint to Pipe				Pin Tong Space			Box Tong Space	Adjusted Weight
		In		mm	Ib/ft		Upset Type			in			mm			in		Sq/in		Type	in			in			ft-lb			Joint to Pipe				in			in		Ib/ft	kg/m
43	4		101. 60			11.85		E-75	IU			0.262		6. 65			3.476		3.077	NC40			5 1/4			2 13/16			12400			1.21	9			12			13.41		19.97
44	4		101. 60			11.85		X-95	IU			0.262		6. 65			3.476		3.077	NC40			5 1/4			2 13/16			12400			0.95	9			12			13.41		19.97
45	4		101. 60			11.85		G-105	IU			0. 262		6. 65			3. 476		3.077	NC40			5 1/4			2 13/16			12400			0.86	9			12			13.41		19.97
46	4		101. 60			11.85		S-135	IU			0.262		6. 65			3. 476		3.077	NC40			5 1/2			2 9/16			14600			0.80	9			12			14. 23		21.20
47	4		101. 60			11.85		E-75	IU			0. 330		8. 38			3. 340		3.805	NC40			5 1/4			2 13/16			12400			1.01	9			12			15. 64		23. 30
48	4		101. 60 101.60			11.85		E-75	EU			0. 330		8. 38			3.340		3.805	NC46			6			3 1/4			17600			1.44	9			12			16.51		24. 59
49	4		101. 60			11.85		X-95	IU			0. 330		8. 38			3. 340		3.805	NC40			5 1/4			2 11/16			13500			0.87	9			12			15.82		23. 56
50	4		101. 60			11.85		X-95	EU			0. 330		8. 38			3. 340		3.805	NC46			6			3 1/4			17600			1.14	9			12			16.51		24. 59
51	4		101. 60			11.85		G-105	IU			0. 330		8. 38			3. 340		3.805	NC40			5 1/2			2 7/16			15600			0.92	9			12			16. 62		24. 76
52	4		101. 60			11.85		G-105	EU			0. 330		8. 38			3.340		3.805	NC46			6			3 1/4			17600			1.03	9			12			16.51		24. 59
53	4		101. 60			11.85		S-135	IU			0. 330		8. 38			3. 340		3.805	NC40			5 1/2			2			18900			0.87	9			12			17.15		25. 54
54	4		101. 60			11.85		S-135	EU			0. 330		8. 38			3. 340		3.805	NC46			6			3			20500			0.94	9			12			16.90		25.17
55	4		101. 60			15. 70		E-75	IU			0. 380		9. 65			3. 240		4.322	NC40			5 1/4			2 13/16			12400			0.91	9			12			17. 22		25. 65
56	4		101. 60			15. 70		E-75	EU			0. 380		9. 65			3.240		4.322	NC46			6			3			20500			1.52	9			12			18. 34		27. 32
57	4		101. 60			15. 70		X-95	IU			0. 380		9. 65			3. 240		4. 322	NC40			5 1/4			2 9/16			14600			0.85	9			12			17. 57		26.17
58	4		101. 60			15. 70		X-95	EU			0. 380		9. 65			3. 240		4.322	NC46			6			3			20500			1.20	9			12			18. 49		27.54
59	4		101. 60			15. 70		G-105	IU			0. 380		9. 65			3. 240		4.322	NC40			5 1/2			2 7/16			15600			0.83	9			12			18. 20		27.11
60	4		101.60			15. 70		G-105	EU			0.380		9.65			3. 240		4.322	NC46			6			3			20500			1.09	9			12			18.49		27. 54
61	4		101. 60			15. 70		S-135	IU			0. 380		9. 65			3. 240		4. 322	NC40			5 1/2			2			18900			0. 78	9			12			18. 73		27.90
62	4		101. 60			15. 70		S-135	EU			0. 380		9. 65			3. 240		4.322	NC46			6			3			20500			0.84	9			12			18.49		27. 54
63	4 1/2		114. 30			16. 60		E-75	IEU			0. 337		8. 56			3.826		4. 407	NC46			6 1/4			3 1/4			17600			1.10	9			12			19.14		28.51
64	4 1/2		114. 30			16. 60		E-75	IEU			0. 337		8. 56			3.826		4. 407	4 1/2 FH			6			3			17600			1.13	9			12			19.03		28. 35
65	4 1/2		114. 30			16. 60		E-75	EU			0. 337		8. 56			3.826		4. 407	NC50			6 5/8			3 3/4			19800			1.24	9			12			19.19		28. 58
66	4 1/2		114. 30			16. 60		X-95	IEU			0. 337		8. 56			3.826		4. 407	NC46			6 1/4			3 1/4			17600			0.87	9			12			19.14		28.51
67	4 1/2		114. 30			16. 60		X-95	IEU			0. 337		8. 56			3. 826		4. 407	4 1/2 FH			6			3			17600			0.89	9			12			19. 03		28. 35
68	4 1/2		114. 30			16. 60		X-95	EU			0. 337		8. 56			3.826		4. 407	NC50			6 5/8			3 3/4			19800			0.98	9			12			19.19		28. 58
69	4 1/2		114. 30			16. 60		G-105	IEU			0. 337		8. 56			3.826		4. 407	NC46			6 1/4			3			20500			0.92	9			12			19. 57		29.15
70	4 1/2		114. 30			16. 60		G-105	IEU			0. 337		8. 56			3.826		4. 407	4 1/2 FH			6 1/4			2 3/4			20100			0.93	9			12			19.96		29. 73
71	4 1/2		114. 30			16. 60		G-105	EU			0. 337		8. 56			3. 826		4. 407	NC50			6 5/8			3 3/4			19800			0.88	9			12			19.19		28. 58
72	4 1/2		114. 30			16. 60		S-135	IEU			0. 337		8. 56			3.826		4. 407	NC46			6 1/4			2 3/4			23200			0.81	9			12			19.96		29. 73
73	4 1/2		114. 30			16. 60		S-135	IEU			0. 337		8. 56			3.826		4. 407	4 1/2 FH			6 1/4			2 3/4			20100			0. 72	9			12			19.96		29. 73
74	4 1/2		114. 30			16. 60		S-135	EU			0. 337		8. 56			3.826		4. 407	NC50			6 5/8			3 1/2			23400			0.81	9			12			19. 65		29. 27
75	4 1/2		114. 30			20. 00		E-75	IEU			0. 430		10.92			3.640		5. 498	NC46			6 1/4			3			20500			1.08	9			12			22.89		34.09
76	4 1/2		114. 30			20. 00		E-75	EU			0. 430		10.92			3.640

Drill Pipe