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Baotou Found Petroleum Machinery Co.,Ltd covers an area of 130 mus. It is a specialized producer which produces the petroleum machinery such as oil tube, drilling collar, drill pipe and sucker rod etc.
| Heavy weight drill pipe | |||||||||
| Spec. | OD | Type | Tool joint OD | Bevel of box and pin | Size of upset | Weight | |||
| mm | inch | mm | inch | Middle.(mm) | End (mm) | ||||
| 35-NC38 | 88.9 | 3 1/2 | NC38 | 52.39 | 2 1/6 | 116.3 | 101.6 | 92.1 | 370 |
| 45-NC46 | 114.3 | 4 1/2 | NC46(4 IF) | 71.4 | 2 13/16 | 145 | 127 | 117.5 | 585 |
| 50-NC50 | 127 | 5 | NC50(4 1/2 IF) | 76.2 | 3 | 154 | 139.7 | 130.2 | 700 |
| 55-51/2FH | 139.7 | 5 1/2 | 5 1/2 FH | 92.1 | 3 5/8 | 170.7 | 152.4 | 144.5 | 730 |
| NOTE: HWDP is made from AISI4145H,All physical properties conform with API Spec 7 and SY/T5146,shape and size we manufacture as follows. | |||||||||
API 5DP heavy weight drill pipe