دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device with sealed and lubricated bearings that is installed on the leg of a roller cone bit. Its function is to maintain equal pressure inside and outside the bits bearings in spite of the fact that the drilling mud in the hole can exert very high pressure outside the bit.

n: the part that fixed on the tooth palm of sesl bearing cone bit.