Premium Class drill pipe has become the NORM in the industry for drilling, while Class 2 has been rarely used by most Operators.
|Tube wall thickness (% remaining wall)
|Maximum Allowable Slip Cut (% remaining wall)
|Minimum Tool Joint Outside Diameter
||80% of tube
Refer to API RP 7G-2 “Recommended Practice for inspection and Classification of Used Drill Stem Elements” for more information.