Coupling

Product Detail

Dimensions of Tubing API Coupling (NU)


Size Range: 2-3/8", 2-7/8" and 3-1/2" OD for Tubing
4-1/2" -20" OD for Casing
Thread type: 8RD, 10RD for Tubing(also called EU and NU)
BTC, LTC, STC for Casing
Also supply the customization threads as per client’s drawings.
Features:
1. Coupling is produced through tube rolling, heat treatment, threading and other procedures.
2. Surface treatment: Phosphating
3. Accordance with API 5CT and 5B standards.
4. Inspection includes Non-destructive testing, Hydrostatic pressure(Max.120 MPa).

If you are looking for competitive, high quality and fast delivery oilfield coupling in stock, or if you are planning to buy coupling API from one of the leading casing and tubing couplings, phosphating coupling, eue(8rd) and nue(10rd) coupling, premium connection coupling, casing and tubing collar gas tight connection manufacturers and suppliers China, please feel free to contact VIGOR.

1. Dimensions of Tubing API Coupling (NU)

Size	OuterDiameter  of  Tubing	Outer  Diameter  of  Coupling	Min.  Length  of  Coupling	Piece  Weight  (kg)	Suggested  Size  (Outer  Diameter  * Wall  Thickness)
1.900	48.26	55.88	95.25	0.56	55.9  *  8
2-3/8	60.32	73.02	107.95	1.28	73  * 11
2-7/8	73.02	88.90	130.18	2.34	88.9  * 12.5
3-1/2	88.90	107.95	142.88	3.71	108  * 15
4	101.60	120.65	146.05	4.35	120.7  * 15.5
4-1/2	114.30	132.08	155.58	4.89	132  * 15

2. Dimensions of Tubing API Coupling (EU)

Size	Outer Diameter  of  Tubing	Outer  Diameter  of  Coupling	Min.  Length  of  Coupling	Piece  Weight  (kg)	Suggested  Size  (Outer  Diameter  * Wall  Thickness)
1.900	48.26	63.50	98.42	0.84	63.5  *9.5
2-3/8	60.32	77.80	123.82	1.55	77.8  *11.5
2-7/8	73.02	93.17	133.35	2.40	93.17  *13
3-1/2	88.90	114.30	146.05	4.10	114.3  *15.5
4	101.60	127.00	152.40	4.82	127  *16
4-1/2	114.30	141.30	158.75	6.02	141.3  *17

3. Dimensions of Casing API Coupling 

Casing   Specification   (mm)	Outer   Diameter    of   Coupling   (mm)	Round   Thread				Buttress   Thread
		Short   Round   Thread		Long   Round   Thread
		Min.   Length   (mm)	Weight   (kg)	Min.   Length   (mm)	Weight   (kg)	Min.   Length   (mm)	Weight   (kg)
114.30	127.00	158.75	3.62	177.80	4.15	225.42	4.55
127.00	141.30	165.10	4.66	196.85	5.75	231.78	5.85
139.70	153.67	171.45	5.23	203.20	6.42	234.95	6.36
177.80	194.46	184.15	8.39	228.60	10.83	154.00	10.54
193.68	215.90	190.50	12.30	234.95	15.63	263.52	15.82
244.48	269.88	196.85	18.03	266.70	25.45	269.88	23.16
273.05	298.45	203.20	20.78	-	-	269.88	28.03
339.73	365.12	203.20	25.66	-	-	269.88	31.77

4.API Coupling


	Size	Type	Outer   Diameter (0   /   1%)	Wall   Thickness (0   /   2.5%)
API   Tubing	2   3/8	NU	73.00	12
	2   3/8	EU	77.80	12
	2   7/8	NU	88.90	13
	2   7/8	EU	93.20	14
	3   1/2	NU	108.00	14
	3   1/2	EU	114.30	15
	4	NU	120.70	15
	4	EU	127.00	15
	4   1/2	NU	132.10	15
	4   1/2	EU	141.30	16
API   Casing	4   1/2	STC	127.00	12
	4   1/2	LC	127.00	12
	4   1/2	BC	127.00	12
	5	STC	141.30	13
	5	LC	141.30	14
	5	BC	141.30	13
	5   1/2	STC	153.70	13
	5   1/2	LC	153.70	14
	5   1/2	BC	153.70	13
	6   5/8	STC	187.70	17
	6   5/8	LC	187.70	17
	6   5/8	BC	187.70	16
	7	200.03	200.03	15
	7	LC	200.03	16
	7	BC	200.03	15
	7   5/8	STC	215.90	18
	7   5/8	LC	215.90	19
	7   5/8	BC	215.90	18
	8   5/8	STC	244.50	20
	8   5/8	LC	244.50	21
	8   5/8	BC	244.50	20
	9   5/8	269.90	269.90	21
	9   5/8	LC	269.90	22
	9   5/8	BC	269.90	20
	10   3/4	STC	298.50	21
	10   3/4	BC	298.50	20
	11   3/4	STC	323.90	21
	11   3/4	BC	323.90	21
	13   3/8	STC	365.10	22
	13   3/8	BC	365.10	21

5. Pipe Stenciling
Spray colors on the outer surface of coupling and then spray chromatic circles as follows:


Grade	Oil   Casing   Chromatic   Circle	Coupling   Color
		Integrated   Coupling	Color   Bar
J55   Tubing	One   Bright   Green   Line	Bright   Green	-
J55   Casing	One   Bright   Green   Line	Bright   Green	One   White   Line
K55	Two   Bright   Green   Lines	Bright   Green	-
N80-1	One   Red   Line	Red	-
N80-Q	One   Red   Line,   One   Bright   Green   Line	Red	Green
L80-1	One   Red   Line,   One   Brown   Line	Red	One   Brown   Line
P110	One   White   Line	White	-