Drill Collar
Spiral drill collar with elevator groove and slip groove
High Quality API 7-1 NS-1 Non-Magnetic Drill Collar
API 5DP 4" NC40 heavy weight drill pipe HWDP
API 5DP drilling seamless S135 5 1/2FH 5 1/2" /5" drill pipe
API Spec 5ct Seamless Oil casing pipe(all sizes) for well wall
0086-546-8058559
