chad No-magnetic collar
Category:
chadNo-magnetic collar
Product Description
The non-magnetic drill collar is made of a low-carbon high-chromium manganese alloy steel. It is refined after strict chemical composition ratio and achieved its mechanical properties through forging. It has good low magnetic permeability and high strength. Mechanical properties, excellent intergranular corrosion cracking resistance and excellent wear resistance. When the magnetic field strength is 1 × 105/4πA/m, the relative permeability μr of the non-magnetic drill collar is less than or equal to 1.010.
the role of non magnetic drill collar:
Since all magnetic measuring instruments induce the geomagnetic field of the borehole when measuring the direction of the borehole, the measuring instrument must be a non-magnetic environment. However, in the drilling process, the drilling tool is often magnetic, has a magnetic field, affects the magnetic measurement instrument, can not get the correct well trajectory measurement information data, the use of non-magnetic drill collar can implement non-magnetic environment, and has the characteristics of the drill collar in drilling.
working principle of non magnetic drill collar:
The interference magnetic field lines above and below the non-magnetic drill collar have no effect on the measuring instrument, so the non-magnetic drill collar creates a non-magnetic environment for the magnetic measuring instrument, which ensures that the data measured by the magnetic measuring instrument is real geomagnetic field information.
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