دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a coring process in which nitrogen is used to maintain a pressure of 5,000 to 7,000 pounds per square inch (34.5 to 48.3 megapascals) on the core as it is retrieved from the borehole. Pressure coring is used to minimize the escape of fluid from the core during recovery and to prevent mud invasion and flushing.

n: sww core drilling with keeping formation pressure.