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Specifications

Coupling
Casing and tubing coupling

Oil Tubing Coupling (API Spec 5CT & 5B)

Oil Tubing Coupling (API Spec 5CT & 5B)
API Non-upset Tubing Coupling-Dimension, Tolerances and Masses
Label 1
Outside Diameter mm
Minimum Length NL   mm
Diameter of recess mm
Width of bearing face mm
Maximum bearing face diameter mm
Mass
kg
Steel
Grade
1.050
26.67
80.96
28.27
1.59
30.00
0.23
J55/K55 
L80,C90
C95
N80-1/ N80-Q
T95,P110
Q125
1.315
33.40
82.55
35.00
2.38
37.80
0.38
1.660
42.16
88.90
43.76
3.18
47.17
0.59
1.900
48.26
95.25
49.86
1.59
52.07
0.56
2-3/8
60.32
107.95
61.93
4.76
66.68
1.28
2-7/8
73.02
130.18
74.63
4.76
80.98
2.34
3-1/2
88.90
142.88
90.50
4.76
98.42
3.71
4
101.60
146.05
103.20
4.76
111.12
4.35
4-1/2
114.30
155.58
115.90
4.76
123.19
4.89
a   The size designation for the coupling is the same as the size designation for the pipe on which the coupling is used
b   Tolerance on outside diameter Wb, +/-1%
API external-upset tubing coupling--Dimensions, tolerances and masses
Label 1
Size
Outside Diameter
Minimum Length mm
Diameter of recess mm
Width of Bearing Regular mm
Maximum bearing face diameter mm
Mass kg
Steel Grade
Outside Diameter mm
Regular Bevel Wb mm
Special Clearance  Wc mm
Special bevel mm
Special clearance mm
Regular
Special clearance
1.050
26.67
42.16
-
82.55
35.00
2.38
37.80
-
0.38
-
J55/K55    L80,C90
C95
N80-1/ N80-Q
T95,P110
Q125
1.315
33.40
48.26
-
88.90
38.89
2.38
42.77
-
0.57
-
1.660
42.16
55.88
-
95.25
47.63
3.18
50.95
-
0.68
-
1.900
48.26
63.50
-
98.42
54.76
3.18
58.34
-
0.84
-
2-3/8
60.32
77.80
73.91
123.82
67.46
3.97
71.83
69.90
1.55
1.07
2-7/8
73.02
93.17
87.88
133.35
80.16
5.56
85.88
83.24
2.40
1.55
3-1/2
88.90
114.30
106.17
146.05
96.85
6.35
104.78
100.71
4.10
2.38
4
101.60
127.00
-
152.40
109.55
6.35
117.48
-
4.82
-
4-1/2
114.30
141.30
-
158.75
122.25
6.35
130.96
-
6.05
-
a .The size designation for the coupling is the same as the size designation for the pipe on which the coupling is used.
b .Tolerance on outside diameter Wb,+/-1%;
c .Tolerance on outside diameter Wc, +/-0.38 mm


Oil casing coupling

Oil Casing Coupling
API Round-Thread Casing Coupling-Dimension, Tolerances and Masses
Label 1
Size
Outside Diameter
mm
Wb,c
Minimum Length mm
Diameter of Recess
mm
Width of bearing face
Mass kg
Grade
Outside Diameter mm
Short
NL
 
Long
NL
Short
Long
1
2
3
4
5
6
7
8
9
J55  K55   L80   C90   C95   N80-1   N80-Q  T95   P110   Q125
 
4-1/2
114.30
127.00
158.75
177.80
116.68
3.97
3.62
4.15
5
127.00
141.30
165.10
196.85
126.38
4.76
4.66
5.75
5-1/2
139.70
153.67
171.45
203.20
142.08
3.18
5.23
6.42
6-5/8
168.28
187.71
184.15
222.25
170.66
6.35
9.12
11.34
7
177.80
194.46
184.15
228.60
180.18
4.76
8.39
10.83
7-5/8
193.70
215.90
190.50
234.95
197.64
5.56
12.30
15.63
8-5/8
219.08
244.48
196.85
254.00
223.04
6.35
16.23
21.67
9-5/8
244.48
269.88
196.85
266.70
248.44
6.35
18.03
25.45
10-3/4
273.05
298.45
203.20
-
277.02
6.35
20.78
-
11-3/4
298.45
323.85
203.20
-
302.42
6.35
22.64
-
13-3/8
339.72
365.12
203.20
-
343.69
5.56
25.66
-
16
406.40
431.80
228.60
-
411.96
5.56
34.61
-
18-5/8
473.08
508.00
228.60
-
478.63
5.56
54.01
-
20
508.00
533.40
228.60
292.10
513.56
5.56
43.42
57.04
API Buttress-Thread Casing Coupling-Dimension, tolerances and masses
Label 1
Size
Outside Diameter
Minimum Lenth  NL   mm
Diameter of Recess
mm
Width of bearing face
Mass kg
Grade
Outside Diameter mm
Regular Wb,c mm
Special Clearance
Wc mm
Regular
Special Clearance
4-1/2
114.30
127.00
123.82
225.42
117.86
3.18
4.55
3.48
J55  K55   L80   C90   C95   N80-1   N80-Q  T95   P110   Q125
5
127.00
141.30
136.52
231.78
130.56
3.97
5.85
4.00
5-1/2
139.70
153.67
149.22
234.95
143.26
3.97
6.36
4.47
6-5/8
168.28
187.71
177.80
244.48
171.83
6.35
11.01
5.65
7
177.80
194.46
187.32
254.00
181.36
5.56
10.54
6.28
7-5/8
193.68
215.90
206.38
263.52
197.23
7.94
15.82
9.29
8-5/8
219.08
244.48
231.78
269.88
222.63
9.52
20.86
10.80
9-5/8
244.48
269.88
257.18
269.88
248.03
9.52
23.16
12.02
10-3/4
273.05
298.45
285.75
269.88
276.61
9.52
25.74
13.39
11-3/4
298.45
323.85
-
269.88
302.01
9.52
28.03
-
13-3/8
339.72
365.12
-
269.88
343.28
9.52
31.77
-
16
406.40
431.80
-
269.88
410.31
9.52
40.28
-
18-5/8
473.08
508.00
-
269.88
476.99
9.52
62.68
-
20
508.00
533.40
-
269.88
511.91
9.52
50.10
-
a The size designation for the coupling is the same as the size designation for the pipe on which the coupling is used
b Groups 1,2 and 3: Tolerance on outside diameter W+/-1% but not greater than +/-3.18mm
c Group 4: Tolerance on outside diameter W+/-1% but not greater that mm
d Groups 1,2 and 3: Tolerance on outsider diameter Wc, mm