A new kind of non magnetic drill collar.

In the drilling process, the drill tends to have a magnetic, having a magnetic field, the magnetic influence of the measuring instrument, can not get the correct measurement information wellbore trajectory data. To this end, the drill collar manufacturer through continuous efforts and research, to produce a new kind of non magnetic drill collar. It is the use of a low carbon high chromium manganese alloy steel, which is the result of a rigorous refining and chemical composition ratio by forging achieve its mechanical properties, good low permeability, mechanical properties of high strength, excellent resistance to intergranular corrosion cracking resistance and excellent abrasion resistance.