Non-magnetic Drill Collar

It’s made from N1310 low carbon alloy-steel, refined and forged by strict chemical analysis to reach its mechanical properties. It has favorable low-permeability, high-strength mechanical properties, great splitting properties of corrosion resistance and excellent abrasion performance.
When MPS=1×105/4p A/m, its relatively magnetic permeabilityµr=1.010
When any distance by the inner hole is 100mm, its field gradient=0.05µT
? Magnetic permeability (MPS=1×1×105/4p Nm)
? Max: 1.010
? Average value: µr=1.005
? Field gradient (hot spot)
? Max: B=0.05



Non-magnetic Drill Collar