苏联勘技所研究的16A3-CB型人造金刚石(CBCп)新钻头,被建议采用单层岩心管,在大块的(即厚层的)与微裂隙的Ⅴ-Ⅷ级岩石中钻进。新钻头的特点是:胎体的齿状外形;齿部与其侧面镶以粗的(8—12粒/克拉)碎粒金刚石(CECп),在齿部还补充以细粒(150～400粒/克拉)金刚石(CBCп)。在钻进研磨性岩石时,由于浸渍层的存在,可以提高钻头原料的耐磨性。 The new 16A3-CB synthetic diamond (CBC-NP) drill bit studied by the Soviet Institute of Exploration and Mining has been proposed for drilling in large (ie, thick) and microfractured Ⅴ-Ⅷ rocks using a single core tube. The new drill is characterized by a toothed profile of the carcass; the toothed portion and its sides are lined with coarse (8-12 carats) of crushed diamond (CEC-5) and the teeth are also supplemented with fine granules (150-400 grains / Carat) diamond (CBCп). When grinding abrasive rock, the abrasion resistance of the bit material can be improved due to the impregnation layer.