In order to work properly, every bit is designed to run with a given amount of down pressure. It takes a certain amount of push. When drilling vertically, this is bit weight. Whether drilling with a tricone bit, polycrystalline diamond compact (PCD) or hammer bit, the manufacturer sets an ideal weight to get the best performance. Different manufacturers will have their own chart or formula. Knowing the correct bit weight will help you get the most out of that bit.
I’m a drill pipe guy. I do not sell bits. So, why do I care about bit weight? Let me explain.