... rock etc. Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit, casing shoe bit, corelifter, corelifter case, core barrel assembly, inner tube ... of high quality synthetic diamond are distributed in the depth of impregnated bit's matrix series. The matrix layer of ... T6 146, T6S 101, T6S 116 T series: T36, T46, T56, T66, T76, T86 Z series: Z46, Z56, Z66, Z76, Z86, ...