Description

Non-magnetic Drill collars are made of Non-magnetic materials with high- strengh or low- strength by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability excellent machine ability.
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Each drill collar is fully inspected by internal inspection dept.All data obtained are recorded on the inspection certificate furnished with each drill collar.API monogram,serial number,OD,ID,type and size of connections are stamped on recessed mill flats.