دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Using double core barrel drill to break the annular stone at bottom and keep the central cylindrical core. Cut it down and hoist it to the surface when the length satisfies requirement.

n: the process of cutting a vertical, cylindrical sample of the formations encountered as an oilwell is drilled. The purpose of coring is to obtain rock samples, or cores, in such a manner that the rock retains the same properties that it had before it was removed from the formation.

n: The act of producing a sample of the formation being drilled for geological information purposes. Conventional coring is done by means of a core barrel put on the bottom of the drill pipe where the bit normally operates. As the cutter head of the core bar