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1. Type: Standard Drill Collars·2. Certification: API·3. Material: Alloy Steel·4. Color: Green·5. Machine Type: Drilling
| Place of Origin | Henan China (Mainland) | Model Number | API Spec 7-1 |
|---|---|---|---|
| Type | Drill Collar | Machine Type | Drilling Tool |
| Certification | API | Material | API 7-1 Green Modified Alloy Steel,4145H alloy steel |
| Processing Type | Forging | Use | petroleum drilling |
| 1. Type | Standard Drill Collars | 2. Certification | API |
| 3. Material | Alloy Steel | 4. Color | Green |
| 5. Machine Type | Drilling |
| Packaging Detail | As per Customer's request |
|---|---|
| Delivery Detail | 7-15 days after getting your prepayment of workable L/C. |
Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API Spec 7-1 Hard banding is optional at customers request.
| Drill collar ranges O.D.(mm) | Elevator groove depth (mm) | Elevator groove length(mm) | Slip groove length(mm0 | Slip groove length(mm) |
| 101.6-117.5 | 5.6 | 4.8 | 406 | 457 |
| 120.6-142.9 | 6.4 | 4.8 | 406 | 457 |
| 146.0-168.3 | 7.9 | 6.4 | 406 | 457 |
| 171.4-219.1 | 9.5 | 6.4 | 406 | 457 |
| no less than222.2 | 11.1 | 6.4 | 406 | 457 |
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