Since 1986, Bakersfield Bit & Tool has offered a complete line of casing section mills and underreamers and services. BB&T evaluates rock bit lubricants, bearings, cutting structures and hydraulic designs while taking into consideration the extreme conditions found downhole. By analyzing the relationship of rate penetration (ROP) to changes in hydraulics, weight, rotary speed and torque, BB&T service consultants can open a hole or mill a section faster and more reliable.