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1,tci tricone drilling bits built up together·2,certified by API·3,wide size code·4,best price·5,delivery on time
| Place of Origin | Henan China (Mainland) | Model Number | API Spec |
|---|---|---|---|
| Type | Drill Collar | Machine Type | Drilling Tool |
| Certification | API | Material | allloy steel, SY5411 standard |
| Processing Type | Forging | Use | Well Drilling |
| Details | 1,tci tricone drilling bits built up together · 2,certified by API · 3,wide size code · 4,best price · 5,delivery on time |
| Packaging Detail | Simple package suited sea shipment |
|---|---|
| Delivery Detail | 7-15 days after getting your prepayment of workable L/C. |
The Drill Collar of Zhongzhong is made from AISI 4145H alloy steel, and completely meets the requirement of API Spec 7-1 and SY/T5144 Standard. It is the round pipe with smooth surface and thick wall, and the both ends are machined screw thread for connection. It is mainly used between the drill head and the drill pipe, so that it can make the drill head work reposefully and keep right trace by providing the pressure and weight for drill head.
Specification:
Connections | OD mm | ID mm | Length mm | |
| NC23-31 | 79.4 | 31.8 | 9150 | |
| NC26-35 | 88.9 | 38.1 | 9150 | |
| NC31-41 | 104.8 | 50.8 | 9150 or 9450 | |
| NC35-47 | 120.7 | 50.8 | 915 or 9450 | |
| NC38-50 | 127.0 | 57.2 | 9150 or 9450 | |
| NC44-60 | 152.4 | 57.2 | 9150 or 9450 | |
| NC44-60 | 152.4 | 71.4 | 9150 or 9450 | |
| NC44-62 | 158.8 | 57.2 | 9150 or 9450 | |
| NC46-62 | 158.8 | 71.4 | 9150 or 9450 | |
| NC46-65 | 165.1 | 57.2 | 9150 or 9450 | |
| NC46-65 | 165.1 | 71.4 | 9150 or 9450 | |
| NC46-67 | 171.4 | 57.2 | 9150 or 9450 | |
| NC50-67 | 171.4 | 71.4 | 9150 or 9450 | |
| NC50-70 | 177.8 | 57.2 | 9150 or 9450 | |
| NC50-70 | 177.8 | 71.4 | 9150 or 9450 | |
| NC50-72 | 184.2 | 71.4 | 9150 or 9450 | |
| NC56-77 | 196.8 | 71.4 | 9150 or 9450 | |
| NC56-80 | 203.2 | 71.4 | 9150 or 9450 | |
| 6 5/8REG | 209.6 | 71.4 | 9150 or 9450 | |
| NC61-90 | 228.6 | 71.4 | 9150 or 9450 | |
| 7 5/8REG | 241.3 | 76.2 | 9150 or 9450 | |
| NC70-97 | 247.6 | 76.2 | 9150 or 9450 | |
| NC70-100 | 254.0 | 76.2 | 9150 or 9450 | |
| 8 5/8REG | 279.4 | 76.2 | 9150 or 9450 | |
