OD:

89mm ( 3 1/2 inch) thread drill pipe from China supplier 

Grade:

E75/R780/G105/S135

Length:

(2~12.5 meters)

Wall Thickness:

9.35mm

Connection:

89mm(internal upset)/105mm(external upset)

Tool Joint:

35CrMo

Apply to:

Well drilling,mining drilling,gas drilling

Safe drilling depth:

Within 3000 meters

Process type:

Friction welding drilling

Thread type:

NC31

Thickness style:

Internal and External Upset

Thread treatment:

Phosphorization, copper plating