Drilling professional term
2013-03-281 Badgerbit: a specially designed bit with one large nozzle, which can be used as a deflecting tool in soft formations.
2 Bentonite: a finely powdered claymaterial (mainly montmorillonite) which swells when mixed with water. Commonly used as a mud additive, and sometimes referred to as "gel".
3 Bent sub: a short piece of pipe whose axis is deviated 1°-3°off vertical. Used in directional drilling as a deflecting tool.
4 Bit:the cutting element at the bottom of the drillstring, used for boring through the rock.
5 Bit breaker:a heavy metal plate which fits into the rotarytable and holds the bit while it is being connected to or disconnected from the drillstring.
6 Bit sub:a short length of pipe installed immediately above the bit. The threads on the bit sub accept the pin thread on the bit and the pin thread for the drill collars.
7 BOP:Blowout Preventer. A valve installed on top of die wellhead to control wellbore pressure in the event of a kick.