دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: term used for a non-magnetic drill collar made from specially treated alloys so that it does not affect magnetic surveying instruments.

n: a nickel-base alloy containing copper. iron. manganese. silicon. and carbon. Corrosion-resistant parts are often made of this material.

n: alloy steel that maily contains nickel .

n: a collar that will isolate a magnetic compass from local magnetic effects (see monel).