Cause analysis of remanence of directional drill pipe
Release time:
2022-01-19
The reasons for remanence of directional drill pipe are as follows:
Metal smelting or pipe manufacturing process;
The pipeline stops in a strong magnetic field;
Non destructive testing by magnetization method;
The electromagnetic induction method is used to preheat the welded junction and the residual magnetism produced by heat treatment;
Lathe cutting, grinding wheel grinding groove;
The axis is consistent with the direction of the geomagnetic field and is magnetized by the geomagnetic field due to impact or vibration.
Focus on hot spots
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