Practical articles on well drilling, bit selection and tool care.
Steel tooth or TCI, open or sealed bearing, which diameter and which thread — a practical guide to picking the right roller-cone bit before you compare prices.
What each of the three digits means, what the suffix letter adds, and what the code deliberately does not tell you about the bit you are buying.
PDC bits shear, tricones crush. That one difference decides which is faster, which survives boulders, and which is actually cheaper per metre.
