潜孔钻机的工作效果,很大程度取决于冲击器和钻头的性能,在每米钻孔的穿凿成本中,钻具费用约占30～60％。我国早期使用的潜孔冲击器和钻头,大多是仿苏M-1900类型的侧排气冲击器(我国称C型冲击器)和镶焊硬质合金片的钻头,这类冲击器和钻头,穿孔效率低,使用寿命短,生产成本很高。 1972年开始,我院和嘉兴冶金机械厂等单位一道,研制成功了J型潜孔冲击器和柱齿潜孔钻头,到1979年已先后鉴定转产了J—200,J—170,J-150,J-100冲击器和钻头共 The effectiveness of a downhole drilling rig depends largely on the performance of the impactor and bit. Drilling costs account for 30-60% of the cost of drilling a hole per meter. In the early days of China, DTH and drill bits were mostly drills with side exhaust impactor (C-type impactor) imitated by Su-M-1900 and diamond-like carbide inserts with such impactor and drill bits, Perforated efficiency is low, short life, high production costs. Since 1972, our hospital and Jiaxing Metallurgical Machinery Factory and other units, successfully developed a J-type downhole impactor and columnar DTH drill bit, has been identified in 1979, the J-200, J-170, J-150 , J-100 impactor and drill bit