Non-Magnetic Drill Collar

The Non-magnetic drill collars are made of low carbon stainless steel and meet the requirements of API Spec.7and SY/T5144.

AII threads are phosphated,copperized or cold worked.Allconnections are equipped with pressed steel thread protectors.

All threads are machined with CNC Lathes-Double-shouldered and special threads. 

                         Non-magnetic drill collars specification