junk | Energy Glossary

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1. n. [Drilling]

Anything in the wellbore that is not supposed to be there. The term is usually reserved for small pieces of steel such as hand tools, small parts, bit nozzles, pieces of bits or other downhole tools, and remnants of milling operations.

See: bridgefishjunk basketjunk basketmechanical stickingmillratholereverse circulationsidetrack

Photograph of junk in bit.