n. [Drilling]
A special tool used by the rig crew to prevent the drill bit from turning while the bit sub on top of it is tightened or loosened.
Bits have noncylindrical shapes, so the conventional wrenches used by
the rig crew to tighten cylindrical shapes like pipes do not fit the
bits properly. In addition, some bits, such as PDC bits, have a wide
range of unusual and asymmetric shapes or profiles. The bit breaker must
match the bit profile or the bit may be ruined before ever being used. ........
source: http://www.glossary.oilfield.slb.com
Hello, my name is Jack Sparrow. I'm a 50 year old self-employed Pirate from the Caribbean.
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