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A brief overview of non-magnetic drill collars
release time：2024-01-29
source： network
Non magnetic drill collar is a type of low-carbon, high chromium manganese alloy steel drill collar, which is refined through strict chemical composition ratio and has good low magnetic permeability and high strength mechanical properties.Non magnetic drill collars have excellent intergranular corrosion cracking resistance and excellent wear resistance. When the magnetic field strength is 1 × Relative magnetic permeability of non-magnetic drill collars at 105/4 π A/m μ R ≤ 1.010. Magnetic induction intensity gradient of non-magnetic drill collars at any distance of 100mm along the inner hole ≤ 0.05 μ T. Due to the fact that all magnetic measuring instruments induce the geomagnetic field of the wellbore when measuring its direction, the measuring instrument must be in a non-magnetic environment.
In addition, a considerable number of non-magnetic drill collar products have been included in the API standard abroad since 1990. In the market, there are also many prices and suppliers for non-magnetic drill collars, including American and national standards, Dalang, Shengdeli, Baosteel Fushun, and other brands and strong suppliers.
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