The non-magnetic drill collars are made of low carbon stainless steel and meet the requirement of API Spec.7 and SY/T5144. All threads are phosphated, copperized or cold worked. All connections are equipped with pressed steel thread protectors. All threads are machined with CNC Lathes-Double-Shouldered and special threads.

Main products: Non-magnetic Drill Collars, Non-magnetic Heavy Weight Drill Pipe and Non-magnetic Compressive Service Drill Pipe.