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Contact Person Ms. sun
Xuelian East Road, Tianjin, China
The drill collar are trepanned and drifted to API Spec 7. Grinding crafts adopted finish boring technology eliminates regions of the weld stress concentration, making welding appearance more perfect, and increasing their life. The full length thermal treatment ensure the mechanical performance fullfil even exceed API Spec 7 requirements. Its brinell hardness ranges from **5 to **1, moreover, charpy “v” notch minimum impact strength of *0 ft-lb at *0℃ are guaranteed one inch below the surface. ***** *****
| Country: | China |
| Model No: | API |
| FOB Price: | Get Latest Price |
| Place of Origin: | - |
| Price for Minimum Order: | - |
| Minimum Order Quantity: | - |
| Packaging Detail: | - |
| Delivery Time: | - |
| Supplying Ability: | - |
| Payment Type: | - |
| Product Group : | - |
