... Suit for drilling medium to medium-hard formations.2,Evolute asymmetrical blade cutter design and balanced bit load so that bit ... removal .5,Combined utilization of high performance PDC compacts significantly prolongs bit lifeHigher nozzle counts and/or fixed ports ... ,152,215.9,244,311,445Typeall kinds and size PDC bitsApplicablewater well, oil field, construction, geothermal, directional boring ...