Drilling Tool
Luhai non-magnetic drill collars are made from non-magnetic materials with low-magnetic permeability. API monogram, serial number, OD,ID, type and size of connections are stamped on recessed mill flats.
Magnetic Properties of Non-magnetic Drill Collar
When MPS=1 105/4 A/m
Relative magnetic permeability 1.1010
Magnetic Field Gradient B0.05 T
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