南非鲍尔特勘探公司(Boart Exploration Services)(BES)在南非市场上销售了一种系列9、用浸渍法制造的取心钻头,据说这种钻头采用活性胎体(reactive matrix),为金刚石在胎体中的滞留提供了条件,以便更有效地利用金刚石.这种钻头在坑道钻进石英岩层时,尤其是用中型功率或大型功率的液压钻机钻进时,可以提高钻头的使用寿 South Africa’s Boart Exploration Services (BES) has marketed a series of 9, impregnated, coring bits in the South African market that are said to employ a reactive matrix of diamond The retention in the carcass provides the conditions for more efficient use of the diamond, which improves the life of the drill bit when it is drilled into the quartz rock formation, especially when drilling with medium power or large power hydraulic drilling rigs