Drilling Industry Glossary
back off
balanced cement plug
barite
BBL or bbl
bent sub
bill of lading (B/L)
bit
bit hydraulic horsepower
bit size
blowout
blowout preventer (BOP)
blowout preventer stack
BML
bottomhole
bottomhole assembly
bottomhole plug
bottomhole pressure (BHP)
breakout
bring in a well
buckling
Bottomhole Assembly
The bottomhole assembly is the portion of the drilling assembly below the drill pipe. It can be as simple as bit and drill collars or it can be very complex and made up of multiple components.
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