دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The diameter of the drilled wellbore. The borehole diameter can change greatly even the same bit due to the change of formation lithology and formation collapse.

n: Borehole diameter value of every well depth obtained from borehole diameter chart.

n: diamand setted gauge protection section of the diamond bit is used to prevent abrade gauge of bit and ensure not to decrease borehole diameter。