2-7/ 8" , 3-1/ 2" , 4" , 4-1/ 2" and 5" drill pipe( G-105 and S-135) are available.
Shanxi Fenglei Machinery Manufacturing Co., Ltd., is located in Houma City of Shanxi Province, is currently the largest specialized production base for Drill Collars, HWDP, Kellys and drill pipes in....