دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a long steel pole with a hook on one end that allows one of the rotary helpers to release the safety latch on the drilling hook so that the bail of the swivel can be removed (as when the kelly is set back prior to making a trip). Also called a shepherds stick, or hook.

n: A long steel arm with hook. The borer uses it to crook safety latch to unload swivel bail from hook.

n: The alloy steel tool that used to suspend swivel on the casing hook.