| Place of Origin |
Jiangsu China (Mainland) |
| Brand Name |
chenlong |
| Type |
Drill Collar |
| Machine Type |
Drilling Tool |
| Certification |
API |
| Material |
High Manganese Steel |
| Use |
Well Drilling |
Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking form differential pressure. Spiral drill collars are manufactured strictly according to the standard of API Spec7-1 and SY/T5144