API 7-1 Oilfield Drill Collar High-Performance Drill Collar Drill pipe comply with the provisions under the Standards API SPEC 5DP and API SPEC7. The grade of steel for the drill pipe willbe determined according to the requirements of Group 1 and Group 3 of API SPEC 5DP.(i.e.: Group 1--Grade E; Group 3--Grade X-95, Grade -G-105 and Grade -S-135)As per requirements of customers, drill pipe joints at the same level will be provided, and manufactured drill pipe joints will