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1. OD: 3.5”(88.9 mm)
2. Thickness: 9.35 mm or 11.4 mm (13.3 LB/FT or 15.5 LB/FT)
3. Tool joint: NC38
4. Steel grade: G105
5. Length: RI, RII, RIII (2~12 meters)
6. Plastic coating: TC2000, TK34
Features
1. Strictly according to API 5DP standard
2. Yield strength: Min 724 Mpa
3. Tensile strength: Min 793 Mpa
4. Pipe body material: High quality alloy seamless pipe of G105
5. Tool joint: 35CrMo, 4137H, 4145H
6. Thread treatment: Phosphorization or copper plating
7. Suitable for water well, geothermal well, gas well, oil well
8. Safe drilling depth: Within 4,000 meters
More Standard Drill pipe specifications:
| Diameter (inch) | Grade | Upset | RSC (Thread) | Diameter (mm) | Thickness (mm) |
| IU | |||||
| 4 | E | IU | NC40 | 101.60 | 8.38 |
| 4 | X | IU | NC40 | 101.60 | 8.38 |
| 4 | G | IU | NC40 | 101.60 | 8.38 |
| 4 | S | IU | NC40 | 101.60 | 8.38 |
| 4 1/2 | E | IU | NC46 | 114.30 | 6.88 |
| 2 3/8 | E | EU | NC26 | 60.32 | 7.11 |
| 2 3/8 | X,G | EU | NC26 | 60.32 | 7.11 |
| 2 7/8 | E | EU | NC31 | 73.02 | 9.19 |
| 2 7/8 | X,G | EU | NC31 | 73.02 | 9.19 |
| 2 7/8 | S | EU | NC31 | 73.02 | 9.19 |
| 3 1/2 | E | EU | NC38 | 88.90 | 6.45 |
| 3 1/2 | E | EU | NC38 | 88.90 | 9.35 |
| 3 1/2 | X | EU | NC38 | 88.90 | 9.35 |
| 3 1/2 | G | EU | NC38 | 88.90 | 9.35 |
| 3 1/2 | S | EU | NC38 | 88.90 | 9.35 |
| 3 1/2 | E | EU | NC38 | 88.90 | 11.40 |
| 3 1/2 | X | EU | NC38 | 88.90 | 11.40 |
| 3 1/2 | G | EU | NC38 | 88.90 | 11.40 |
| 3 1/2 | S | EU | NC38 | 88.90 | 11.40 |
Drill pipe quality control:
a) Before order to be confirmed, the raw material of pipe body and tool joint should be booked from famous big steel enterprises in China
b) Raw material’s size, quantity, length, mechanical property are checked by our QC staff and factory own laboratory
c) Every drill pipe has nondestructive inspection , cleaned and thread oil before packing.
