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Hi Jesus, Thanks for the question. One of our active members or more from OGnition community will respond to your question ASAP. Meantime if you can register to the website it would much effective way to communicate. Also, u have used ur company email in username which I would not recommend instead use ur name or some other username?

Answer 1

Premium Class drill pipe has become the NORM in the industry for drilling, while Class 2 has been rarely used by most Operators.

	Premium Class	Class 2
Tube wall thickness (% remaining wall)	>= 80%	>= 70%
Maximum Allowable Slip Cut (% remaining wall)	>= 90%	>= 90%
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.