Hi, here is the specification of the drill pipes3 1/2" Heavy Weight drill pipe, 2 1/4" ID NC38 (3 1/2" IF), 4 3/4" OD tool joint with 2 1/16 ID, 18 deg. Tapered tool joints box with bore back and pin with API-7-1 stress relief groove range II (31 ft) long with center wear pad complete with hard banding.and in the attachment you will see the detailed requirements
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