دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: weight placed on the bit that results in tension on the drill string, which causes the mill string to vibrate at tile rotary speed being used. A drill stem operating with critical weight and at the critical speed for that weight will have stresses develop that cause very rapid failure.

n: The weight on bit that causing bottom hole drill string destablizing and occuring primary bending.

n: The weight on bit that causing bottom hole drill string bending to the shape of two and a half wave