API 5CT

Pipes are designed for supporting oil and gas wells. Pipes may be supplied with round short/long thread or Buttress thread according to API 5CT. Upon contractual agreement the pipes may be supplied with threads of other special kinds. Pipes are manufactured in length ranging from 18 to 40 ft.

Elongation, flattening, hydrostatic test are obligation for every single pipe. The pipes may be manufactured highly resistant to corrosion failures at wells` hydrolic acid treatment as per the requirements of NASE MR 01-75 upon contractual agreement. Pipes are supplied with API monogram according to API 5CT (Licenes No.5CT-0427).

Casing pipes and their coupling. The range of size is given in Table 7. The range groups are given in Table 8.

Tubing pipes. The range of size is given in Table 9. The range groups are given in Table 10.

The requirements to chemical composition are given in Table 11. The mechanical properties are given in Table 12. The replacement possibility for grade specifications according to API or GOST standards is given in Table 13.

Table 7

Size designation	Weight designation	Outside diameter		Wall thickness		Inside diameter		T&C Drift diameter		Plain end
		in.	mm	in.	mm	in.	mm	in.	mm	lb./ft	kg/m
4 1/2	10.50	4.500	114.3	0.224	5.69	4.052	102.92	3.927	99.75	10.23	15.24
4 1/2	11.60	4.500	114.3	0.250	6.35	4.000	101.60	3.875	98.43	11.35	16.91
4 1/2	13.50	4.500	114.3	0.290	7.37	3.920	99.57	3.795	96.39	13.04	19.44
4 1/2	15.10	4.500	114.3	0.337	8.56	3.826	97.18	3.701	94.01	14.98	22.32
5	13.00	5.000	127.0	0.253	6.43	4.494	114.15	4.369	110.97	12.83	19.12
5	15.00	5.000	127.0	0.296	7.52	4.408	111.96	4.283	108.79	14.87	22.16
5	18.00	5.000	127.0	0.362	9.19	4.276	108.61	4.151	105.44	17.93	26.70
5	21.40	5.000	127.0	0.437	11.10	4.126	104.80	4.001	101.63	21.60	31.73
5	23.20	5.000	127.0	0.478	12.14	4.044	102.72	3.919	99.54	23.08	34.39
5 1/2	14.00	5.500	139.7	0.244	6.20	5.012	127.30	4.887	124.13	13.70	20.41
5 1/2	15.50	5.500	139.7	0.275	6.99	4.950	125.73	4.825	122.56	15.35	22.88
5 1/2	17.00	5.500	139.7	0.304	7.72	4.892	124.26	4.767	121.08	16.87	25.13
5 1/2	20.00	5.500	139.7	0.361	9.17	4.778	121.36	4.653	118.19	19.81	29.52
5 1/2	23.00	5.500	139.7	0.415	10.54	4.670	118.62	4.545	115.44	22.54	33.57
5 1/2	26.80	5.500	139.7	0.500	12.70	4.500	114.30	4.375	111.13	26.70	39.78
5 1/2	29.70	5.500	139.7	0.562	14.27	4.376	111.15	4.251	107.98	29.64	44.14

Table 8

Range	Nominal length *
	feet	m
1	16.0 - 25.0	4.88 - 7.62
2	25.0 - 34.0	7.62 - 10.36
3	34.0 - 48.0	10.36 - 14.63

*As specified in order.

Table 9

Size designation		Non upset T&C weight	Upset T&C weight	Outside diameter		Wall thickness		Inside diameter		Plain end
in.	mm			in.	mm	in.	mm	in.	mm	lb./ft	kg/m
1.315	33.40	1.70	-	1.315	33.40	0.133	3.38	1.049	26.64	1.68	2.50
1.315	33.40	2.19	-	1.315	33.40	0.179	4.55	0.957	24.31	2.17	3.24
1.660	42.16	2.30	-	1.660	42.16	0.140	3.56	1.380	35.05	2.27	3.39
1.660	42.16	3.03	-	1.660	42.16	0.191	4.85	1.278	33.46	3.00	4.46
1.900	48.26	2.75	-	1.900	48.26	0.145	3.68	1.610	40.89	2.72	4.05
1.900	48.26	3.65	-	1.900	48.26	0.200	5.08	1.500	38.10	3.63	5.41
2 3/8	60.33	4.00	-	2.375	60.33	0.167	4.24	2.041	51.84	3.94	5.87
2 3/8	60.33	4.60	-	2.375	60.33	0.190	4.83	1.995	50.67	4.43	6.61
2 3/8	60.33	5.80	-	2.375	60.33	0.254	6.45	1.867	47.42	5.75	8.57
2 7/8	73.03	6.40	6.50	2.875	73.03	0.217	5.51	2.441	62.00	6.16	9.17
2 7/8	73.03	7.80	7.90	2.875	73.03	0.276	7.01	2.323	59.00	7.66	11.41
2 7/8	73.03	8.60	8.70	2.875	73.03	0.308	7.82	2.259	57.38	8.44	12.58
2 7/8	73.03	9.35	9.45	2.875	73.03	0.340	8.64	2.195	55.75	9.21	13.72
3 1/2	88.9	7.70	-	3.500	88.9	0.216	5.49	3.068	77.93	7.58	11.29
3 1/2	88.9	9.20	9.30	3.500	88.9	0.254	6.45	2.992	76.00	8.81	13.12
3 1/2	88.9	10.20	-	3.500	88.9	0.289	7.34	2.922	74.22	9.91	14.76
3 1/2	88.9	12.70	12.95	3.500	88.9	0.375	9.53	2.750	69.85	12.52	18.65
3 1/2	88.9	14.30	-	3.500	88.9	0.430	10.92	2.640	67.06	14.10	21.00
3 1/2	88.9	15.50	-	3.500	88.9	0.476	12.09	2.548	64.72	15.37	22.90
4	101.6	9.50	-	4.000	101.6	0.226	5.74	3.548	90.12	9.11	13.57
4	101.6	-	11.00	4.000	101.6	0.262	6.65	3.476	88.29	10.46	15.57
4	101.6	13.20	-	4.000	101.6	0.330	8.38	3.340	84.84	12.93	19.27
4	101.6	16.10	-	4.000	101.6	0.415	10.54	3.170	80.52	15.89	23.67
4	101.6	18.90	-	4.000	101.6	0.500	12.70	3.000	76.20	18.69	27.84
4 1/2	114.3	12.60	12.75	4.500	114.3	0.271	6.88	3.958	100.53	12.24	18.23
4 1/2	114.3	15.20	-	4.500	114.3	0.337	8.56	3.826	97.18	14.98	22.32
4 1/2	114.3	17.00	-	4.500	114.3	0.380	9.65	3.740	95.00	16.72	24.90
4 1/2	114.3	18.90	-	4.500	114.3	0.430	10.92	3.640	92.46	18.69	27.84

Table 10

Range	Nominal length*
	feet	m
1	20.0 - 24.0	6.10 - 7.32
2	28.0 - 32.0	8.53 -9.75
3	-	-

*As specified in order.

Table 11

Grade	Fraction of total mass of elements, per cent
	C, max.	Si, max.	Mn, max.	Mo	Cr	Ni, max.	Cu, max.	P, max.	S, max.
H-40								0.030	0.030
J-55								0.030	0.030
K-55								0.030	0.030
N-80								0.030	0.030
L-80/1	0.430	0.450	1.90			0.25	0.35	0.030	0.030
C-90	0.350		1.00	0.25-0.75	1.20	0.90		0.020	0.010
C-95	0.045	0.045	1.90					0.030	0.030
P-110								0.030	0.030

Table 12

Grade	Tensile strength, min.		Yield strength, min.		Yield strength, max.
	psi	MPa	psi	MPa	psi	MPa
H-40	60000	414	40000	276	80000	552
J-55	75000	517	55000	379	80000	552
K-55	95000	655	55000	379	80000	552
N-80	100000	689	80000	552	110000	758
L-80/1	95000	655	80000	552	95000	655
C-90	100000	689	90000	621	105000	724
C-95	105000	724	95000	655	110000	758
P-110	125000	862	110000	758	140000	965

Table 13

GRADE (API)	Grade (GOST)
H-40	D
J-55	D
K-55	D
N-80	E
L-80/1	E
C-90	L
C-95	L
P-110	M

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