API 5CT Couplings

API 5CT Tubing and Casing couplings

We can do API OCTG Tubing couplings from 1.315" to 4-1/2" and Casing couplings from 4-1/2" to 20", with connections of NUE, EUE, STC, LTC and BTC. Steel grade of J55, K55, L80, N80, P110 and so on.

Technical information for Tubing coupling

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Label 1	Size ^a	Outside Diameter			Minimum Length N_L mm		Diameter Of recess Q mm		Width of bearing face regular B mm		Maximum bearing face diameter B f			Mass kg
	Outside Diameter D mm	EU Regular W ^bmm	EU Special Clearance W c ^cmm	NU	EU	NU	EU	NU	EU	NU	EU		NU	EU		NU
	Outside Diameter D mm	EU Regular W ^bmm	EU Special Clearance W c ^cmm	NU	EU	NU	EU	NU	EU	NU	Regular with special bevel mm	Special clearance mm	NU	Regular with special bevel mm	Special clearance mm	NU
1	2	3	4	6	6	7	8	9	10	11	12	13	14	15	16	17
1.050	26.67	42.16	---	33.35	82.55	80.96	35.00	28.27	2.38	1.59	37.80	---	30.00	0.38	---	0.23
1.315	33.40	48.26	---	42.16	88.90	82.55	38.89	35.00	2.38	2.38	42.77	---	37.80	0.57	---	0.38
1.660	42.16	55.88	---	52.17	95.25	88.90	47.63	43.76	3.18	3.18	50.95	---	47.17	0.68	---	0.59
1.900	48.26	63.50	---	55.88	98.42	95.25	54.76	49.86	3.18	1.59	58.34	---	52.07	0.84	---	0.56
2 3/8	60.32	77.80	73.91	73.02	123.82	107.95	67.46	61.93	3.97	4.76	71.83	69.90	66.68	1.55	1.07	1.28
2 7/8	73.02	93.17	87.88	88.90	133.35	130.18	80.16	74.63	5.56	4.76	85.88	83.24	80.98	2.40	1.55	2.34
3 1/2	88.90	114.30	106.17	107.95	146.05	142.88	96.85	90.50	6.35	4.76	104.78	100.71	98.42	4.10	2.38	3.71
4	101.60	127.00	---	120.65	152.40	146.05	109.55	103.20	6.35	4.76	117.48	---	111.12	4.82	---	4.35
4 1/2	114.30	141.30	---	132.08	158.75	155.58	122.25	115.90	6.35	4.76	130.96	---	123.19	6.05	---	4.89

Technical information for Casing coupling

Label 1	Size^a	Outside diameter			Minimum Length N_L mm			Diameter of counterbore Q^d mm		Width of Bearing face B mm		Mass kg
	Outside Diameter D mm	BTC Regular W^b,c mm	BTC Special Clearance^d W c mm	Round	BTC	STC	LTC	BTC	Round	BTC	Round	BTC		Round
	Outside Diameter D mm	BTC Regular W^b,c mm	BTC Special Clearance^d W c mm	Round	BTC	STC	LTC	BTC	Round	BTC	Round	Regular	Special Clearance	STC	LTC
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
4 1/2	114.30	133.35	123.82	133.35	225.42	158.75	177.80	117.86	116.68	6.36	7.14	6.89	3.48	5.24	5.96
5	127.00	147.32	136.52	147.32	231.78	165.10	196.85	130.56	129.38	7.14	7.14	8.38	4.00	6.43	7.86
5 1/2	139.70	160.02	149.22	160.02	234.95	171.45	203.20	143.26	142.08	7.14	6.35	9.30	4.47	7.34	8.92
6 5/8	168.28	187.71	177.80	187.71	244.48	184.15	222.25	171.83	170.66	6.35	6.35	11.01	5.65	9.12	11.34
7	177.80	200.03	187.32	200.03	254.00	184.15	228.60	181.36	180.18	7.94	7.94	13.98	6.28	10.88	13.92
7 5/8	193.68	215.90	206.38	215.90	263.52	190.50	234.95	197.23	197.64	7.94	5.56	15.82	9.29	12.16	15.63
8 5/8	219.08	244.48	231.78	244.48	269.88	196.85	254.00	222.63	222.04	9.52	6.35	20.86	10.80	15.62	21.67
9 5/8	244.48	269.88	257.18	269.88	269.88	196.85	266.70	248.03	248.44	9.52	6.35	23.16	12.02	17.85	25.45
10 3/4	273.05	298.45	285.75	298.45	269.88	203.20	---	276.61	277.02	9.52	6.35	25.74	13.39	20.58	---
11 3/4	298.45	323.85	---	323.85	269.88	203.20	---	302.01	302.42	9.52	6.35	28.03	---	22.43	---
13 3/8	339.72	365.12	---	365.12	269.88	20.3.20	---	343.28	343.69	9.52	5.56	31.77	---	25.42	---
16	406.40	431.80	---	431.80	269.88	228.60	---	410.31	411.96	9.52	5.56	40.28	---	34.33	---
18 5/8	473.08	508.00	---	508.00	269.88	228.60	---	476.99	478.63	9.52	5.56	62.68	---	53.33	---