API Spec 7 STANDARD HEAVY WEIGHT DRILL PIPE, THREAD END NC38 DRILL PIPE

Size: 3 1/2 Inch
Pipe Body O.D : 3 1/2Inch
Pipe Body I.D: 2 1/4Inch
Pipe End O.D: 98.43mm
Pipe End I.D: 2 1/4 Inch
Tong Length: 584.2 male
Total Length:762mm
Material: S135
End Type: Thread NC38
Groove: With Spiral Groove
Performance of Drill Pipe
1. The whole weighted drill pipe and welded weighted drill pipe are manufactured by tempering (quenching + tempering) heat treatment process to ensure that the weighted drill pipe body has better impact toughness;

2. Information management of manufacturing process, inspection test acceptance and product traceability;

3. Pipe body 100%FLUT(longitudinal, transverse, ultrasonic thickness measurement)

4. Pipe end 100%UT or 100%MPI

5. Heavy pipe joints and welds 100%UT+100%MPI;

6. Increase the length of drill pipe joint pliers, drill pipe joint on the shackle, thread cold rolling, thickening the central spiral groove, inner coating, wear belt