WCS Glossary
- Back-In Unit
- Back Off
- Back-Pressure
- Back Pressure (BP) / Surface Back Pressure (SBP) / Surface Applied Back Pressure (SABP)
- Back-Pressure Limit
- Back-Pressure Valve
- Back Pressure Valve
- Back Up
- Back-Up Element
- Backpressure Valve (BPV)
- Backside
- Backup
- Bail
- Bailer
- Balance
- Balance, Mud
- Balance/Underbalance/Overbalance
- Ball
- Ball Catcher
- Ball Check Valve
- Ball Sealers
- Ball Valve
- Ballooning (Formation)
- Ballooning (Tubular)
- Barite (Barytes)
- Barite Plug
- Barrel
- Barrel Equivalent
- Barrel Per Day (B/D)
- Barrier
- Barrier Element (Well Barrier Element-WBE)
- Barrier Envelope (Well Barrier)
- Base
- Base Exchange
- Base Load
- Basket
- Basket Sub
- Battery
- Beam Pumping Unit
- Belching
- Bell Nipple
- Bent Sub
- Bentonite
- Bernoulli’s Equation
- Bernoulli’s Principle
- Best Efficiency Point (BEP)
- Bicarb
- Birddog
- Bit
- Bit Balling