DeRun non-magnetic drill collars are made from non-magnetic materials with low-magnetic permeability. API monogram, serial number, OD,ID, type and size of connections are stamped on recessed mill flats.

Non-magnetic drill collar are made of a kind of low-carbon high chrome-manganese alloy steel. They will achieve their mechanical performance via refining and forging on the basis of strict chemical constituent proportioning with outstanding low permeability, high level of mechanical performance, outstanding resistance to inter-granular corrosion and cracking, and strong wearability.  





Mechanical Properties of Non-magnetic Drill Collar


Magnetic Properties of Non-magnetic Drill Collar