Drill Collar
Product Details
Size: OD 31/2~11, length: 10ft~31ft
Connections are cold-rolled, phosphatized, coated and equipped with thread protectors. These are gauged to API standards.
Our companys drill collars are manufactured from 4145H Modified quenched and tempered steel. After the full length special heat-treatment, a hardness range of 285 to 341 BHN are guaranteed one inch below the surface at room temperature.
spiral drill collar,non-magnetic drill collar
- Length:10ft~31ft
- Technique:Seamless
- Place of Origin:Henan China (Mainland)
- Country:China (Mainland)
- telephone:86-391-6618281
| Length: | 10ft~31ft |
| Technique: | Seamless |
| Place of Origin: | Henan China (Mainland) |
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