دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the annulus space between the out diameter surface and the well wall or inwall of the casing

n: the annular space between the pipe and the well wall

n: a diamond drilling tools series in America,Canda and British,E represents the drilling tools with minimum diameter and Wrepresents the interspace between the pipe and well wall

n: the degree of fluctuation of well wall during drilling ,the effect factors including not only the character,indensity and structure stress of rock but also fluid character,polishing of drilling pipe and other external anency

n: the pole pad that pressed on the well wall.