Non-magnetic drill collars are drill collar tools made of low-carbon high-chromium manganese alloy steel as the main material. Their core characteristics are low magnetic permeability (relative magnetic permeability μr≤1.010) and high-strength mechanical properties. This type of product achieves technical indicators such as tensile strength ≥827MPa and yield strength ≥758MPa through processes such as quenching and tempering heat treatment, and is …