潜孔锤同心跟管钻具零件强度分析与研究

Analysis and research on accessories intensity of DTH hammer drilling with concentric simultaneous casing

介绍了适合卵砾石地层地震勘探孔施工用的潜孔锤同心跟管钻具的结构和工作原理。针对钻具使用中出现的套管螺纹和内外钻头冲击面强度低、寿命短的问题,采用有限元方法对钻具的零件进行了强度分析,并提出了提高套管螺纹和内外钻头寿命的方法。

The paper introduced the structure and principle of DTH hammer drilling with concentric simultaneous casing, which used in seismic exploration drill in gravel. In view of the problems such as low intensity, short lifespan of casing thread and the impact face of inner bit and outer bid in using process, the intensity of the accessories is analyzed with finite element technique. The paper proposed the methods of developing lifespan of casing thread and inner bit and outer bit.