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吉林省勘技所研制的“JCT-56型金刚石液动冲击回转钻头”于一九八七年一月初在北京通过技术鉴定。该钻头与冲击器的配套使用,对加快地质勘探速度,改变钻探工程面貌有重要的推动作用。吉林省勘技所结合液动冲击回转钻进的工艺特点,在研制中先后设计了不同结构特点的液动冲击回转金刚石钻头,通过优选、烧结和物理机械性能对比,确定了两种胎体配方,性能都超过了常规的胎体,在试验台钻进取得了可靠数据。在验证钻头的钻进特点时,选用2-3种钻头唇面形式,分别在四川和吉林两省的三个矿区进行生产试验,共钻进1327.37m。使用的19个JCT-56型金刚石钻头,平均进尺69.86m,最高进尺264.95m,与其它各种类型的金刚石钻头钻进效果相比较,钻头进尺提高125.28％,钻进时效提高27-71％,钻头成本降
JCT-56 diamond hydraulic impact rotary drill developed by Jilin Exploration Institute passed technical appraisal in Beijing in early January 1987. The use of the drill and the impactor, to accelerate the geological exploration speed, change the drilling project has an important role in promoting. Based on the technological characteristics of hydraulic impact rotary drilling in Jilin Province Exploration and Construction Institute, the hydraulic impact rotary diamond bit with different structural features has been designed in the course of development. Through the comparison of optimization, sintering and physical and mechanical properties, two kinds of matrix formulas , Performance than conventional carcass, obtained in the test rig drilling reliable data. In verifying the drilling characteristics of the drill bit, 2-3 types of drill bit lip surfaces were selected for production test in three mines in Sichuan and Jilin provinces, respectively, for a total of 1327.37 m. The 19 JCT-56 diamond drill bits used had an average footage of 69.86m and the maximum footage of 264.95m. Compared with other types of diamond bits, the drill footage was increased by 125.28%, the drilling time was increased by 27-71% Drill costs down