Drill collar can be produced according to API standard, as well as customer’s requirement. It is made of 4145H material, the overall heat treatment and mechanical property meet API Spec 7.1 standard. Thread was treated with phosphate with the advantage of perfect anti-sticking nature.
|
Drill Collar Specs |
Outside Diameter |
Inside Diameter |
Length |
Chamfering Diameter |
| NC35-47 | Φ120.7 | Φ50.8 | 9.14 | Φ114.7 |
| NC38-50 | Φ127.0 | Φ57.2 | 9.14 | Φ121.0 |
| NC46-62 | Φ158.8 | Φ71.4 | 9.14 | Φ150.0 |
| NC46-65 | Φ165.1 | Φ71.4 | 9.14 | Φ154.8 |
| NC50-70 | Φ177.8 | Φ71.4 | 9.14 | Φ164.7 |