1. n. [Well Workover and Intervention]

An operating condition during a snubbing operation in which the wellhead pressure and buoyancy forces are greater than the force resulting from the weight of the pipe or tubing string. In the light-pipe condition the string will be ejected from the wellbore if the gripping force of the slips is lost.

Synonyms: light pipe

Antonyms: heavy pipe,  pipe heavy