دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: peripheral cutting edge of blade bit 。It cut ectooecium of wellbore
and determine the diameter of the wellbore。

n: according to IADC classification of fixed blade bit , it refers to the natural diamond that each kela contains 3 to 7 grains and man-made diamond that its tooth height between 3/8 and 5/8.

n: according to IADC regulation of fixed blade bit classification, the drilling bit cut plane that the height of gauge diameter belows the 1/8 cut plane of drilling bit and the height of counterbore below oe equil to 1/4 and above 1/8 the cut plane of dril

n: according to IADC regulation of fixed blade bit classification, the drilling bit cut plane that the height of gauge diameter and the counterbore belows the 1/8 cut plane of drilling bit . The coring bit difference of inner and outside diameter substitud

n: a kinds of sidehill blade bit.