Study on diamond bit with right trapezoidal cutters for drilling hard-compact rocks
-
摘要: 针对深部钻探钻遇岩石种类多、岩性复杂、硬而致密岩石钻进时效低与钻头寿命短等问题开展研究,提出普适性能钻头的结构设计。在此基础上设计和研制直角梯形齿钻头,并对钻头进行受力分析。理论与实践均表明设计合理,在可钻性7~9级的岩石中钻进时,相比普通钻头而言,该钻头的使用寿命相当、钻进效率提高21%~24%、成本降低约15%。因此,直角梯形齿钻头比普通钻头具有相对明显的优势。Abstract: Deep drilling has the challenges of varied strata types and complicated lithologic characters, and the problems of low rate penetration and short bit service life in hard-compact rock drilling. To solve the above mentioned drilling difficulties, a bit with right trapezoidal cutters was provided as an extensive adapted bit. The requirements of bit structure and performance of extensive adapted bit, as well as force analysis of the right trapezoidal bit were studied. Theoretical study and drilling practice indicated that the right trapezoidal bit had reasonable bit structure, which could obtain good drilling results in rocks with drillability of 7 to 9 grades. Compared to ordinary bits, the right trapezoidal bit has similar bit service life, improving penetrating rate by 21% to 24% and reducing bit cost by 15%. Consequently, the right trapezoidal bit is comparatively better than ordinary bits.
-
Key words:
- right trapezoidal cutters /
- hard-compact rock /
- bending strength
点击查看大图
计量
- 文章访问数: 153
- HTML全文浏览量: 28
- PDF下载量: 19
- 被引次数: 0