【摘要】 针对在硬而致密岩石中钻进时效低的难题,本文分析了碳化钨基热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系,认为钻头的胎体成分及其性能是关键,硬而带脆性的胎体性能有利于金刚石出刃,从而能提高钻进速度。因此,从热压金刚石钻头的胎体成分与性能研究入手,经过反复的试验研究,试制出了热压钢结硬质合金型孕镶金刚石钻头。在硬而致密岩层中钻进的野外试验表明:与普通的碳化钨基钻头相比,钻进时效由0.5 m/h提高到1.18 m/h,钻头工作寿命由10 m/个提高到21.31 m/个,基本解决了在硬而致密岩层中钻进难的问题。试验结果表明,钢结硬质合金型胎体是一种性能优良的金刚石钻头胎体材料,该类型胎体的热压金刚石钻头是一种具有广谱性的金刚石钻头。更多还原

【Abstract】 In order to solve the problem of low efficiency and short service life of hot pressed diamond bit when drilling in hard and compact formation,relations between diamond exposure of hot pressed bit and rock abrasiveness were analyzed in this paper.Research on matrix performances of hot-pressed diamond bit was firstly carried out.Through experiments and theoretical analysis,steel-bonded carbide impregnated diamond bit was trial-manufactured by hot pressing method and great progress was made to overcome the difficulties of drilling in hard and compact formation.Field examinations of steel-bonded carbide bits in drilling in hard and compact formation indicated that the penetration rate increased to 1.18 m/h from 0.5 m/h,and the service life increased to 21.31 m from 10 m in average compared with WC-based diamond bit.The results showed that steel-bonded carbide is a kind of matrix material with excellent properties and the hot-pressed steel-bonded carbide diamond bit has good performances for drilling in hard and compact formation.更多还原