دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a section of a borehole in which excessive wall cake has built up, reducing the hole diameter and making it difficult to run the tools in and out. Compare keyseat.

n: The well section that its diameter reducing because mud cake over thick or layer swelling.

a restricted place in the bore hole, caused by wall cake, dog leg, deviation change or other factor.