Tubing coupling is a type of drilling tool used in oil field. It is mainly used for connecting oil pipes. This pipe coupling has solved the problem that the existing couplings tend to crack due to stress concentration. The oil pipe ends and the inner wall of the steel coupling are connected through threads. The ends of the coupling and the oil pipe have the same type of threads. This type of connection is not easy to crack and the connection effect is good. The tubing coupling can effectively avoid the oil well string dropout accident.
Features
1. This product features corrosion resistance, high efficiency, and good durability.
2. The tubing couplings are available in various specifications.
1. This pipe coupling is used to connect two oil pipes.
2. The thread patterns of the steel coupling include non-upset thread (NUE) and upset thread (EUE).
3. Outer diameter of the tubing coupling ranges from 55.88 mm to 141.3 mm (1.9"~4 1/2").
4. Materials of this product include H40, J55, N80-1, N80Q, L80, C90, T95 and P110.
Size, Tolerance and Weight of API Non-Upset Tubing Coupling
| Code 1 | Specification (a) | Outer Diameter | Min. Length | Boring Diameter | Bearing Surface Width | Max. Bearing Surface Diameter of Special Chamfer | Weight |
| Outer Diameter D (mm) | W(b) mm | NL mm | Q mm | b mm | Bf mm | kg | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|
1.900 2-3/8 2-7/8 3-1/2 4 4-1/2 |
48.26 60.32 73.02 88.90 101.60 114.30 |
55.88 73.02 88.90 107.95 120.65 132.08 |
95.25 107.95 130.18 142.88 146.05 155.58 |
49.86 61.93 74.63 90.50 103.20 115.90 |
1.59 4.76 4.76 4.76 4.76 4.76 |
52.07 66.68 80.98 98.42 111.12 123.19 |
0.56 1.28 2.34 3.71 4.35 4.89 |
|
a: The code of the specification of the coupling is same as the relevant tube. b: Tolerance of Outer Diameter W is ±1%. | |||||||
Size, Tolerance and Weight of API Upset Tubing Coupling
| Code 1 | Specification (a) | 外径 | Min. Length | Boring Diameter | Bearing Surface Width | Max. Bearing Surface Diameters Bf | Weight (kg) | |||
| Outer Diameter | Standard or Special Chamfer Coupling | Special Space Coupling | Special Chamfer Coupling | Special Space Coupling | ||||||
| D (mm) | W(b) mm | WC(c) mm | NL mm | Q mm | b mm | mm | mm | Standard Coupling | Special Space Coupling | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
|
1.900 2-3/8 2-7/8 3-1/2 4 4-1/2 |
48.26 60.32 73.02 88.90 101.60 114.30 |
63.50 77.80 93.17 114.30 127.00 141.30 |
- 73.91 87.88 106.17 - - |
98.42 123.82 133.35 146.05 152.40 158.75 |
54.76 67.46 80.16 96.85 109.55 122.25 |
3.18 3.97 5.56 6.35 6.35 6.35 |
58.34 71.83 85.88 104.78 117.48 130.96 |
- 69.90 83.24 100.71 - - |
0.84 1.55 2.40 4.10 4.82 6.05 |
- 1.07 1.55 2.38 - - |
|
a: The code of the specification of the coupling is same as the relevant tube. b: Tolerance of Outer Diameter W is ±1%. c: Tolerance of Outer Diameter WC is ±0.38 mm. | ||||||||||
