| 影响夹层式钻头性能因素的研究 |
| 投稿时间：2006-04-06 修订日期：2006-04-06 点此下载全文 |
| 引用本文：杨世珍,李杰,裴爱国.影响夹层式钻头性能因素的研究[J].钻探工程,2006,33(5):51-54.YANG Shi-zhen,LI Jie,PEI Ai-guo. Factors Affecting Performance of Sandwich-structured Diamond Core Bits[J]. Drilling Engineering, 2006,33(5):51-54. |
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| 中文摘要:过对夹层结构金刚石钻头的应用研究发现，与同类普通金刚石钻头相比，该钻头的胎体配方硬度可以高HRC3～5；可以适当采用部分细粒度的金刚石替代粗粒度，甚至可以细一个粒度级，在降低成本的同时也能取得较好的效果，特别是在中硬地层(8～10级)钻进时效果尤其明显；易磨损层宽度的设计影响因素很多，总宽度一般是钻头的径向厚度的1/5～1/4比较好；在内缘耐磨层中添加5%～8%的RVD2型70/80目的金刚石进行弥散强化，或者将内缘耐磨层宽度设计成钻头宽度的1/3左右，可解决内缘耐磨层过早磨损而使钻头提前失效的问题。这些经验完善了夹层结构金刚石钻头的制造技术。 |
| 中文关键词:夹层结构 金刚石钻头 体积破碎 胎体硬度 金刚石粒度 |
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| Factors Affecting Performance of Sandwich-structured Diamond Core Bits |
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| Abstract:By studying the application of sandwich-structured synthetic diamond core bits, following results are concluded: Matrix hardness can be HRC3-5 higher than that of similar ordinary ones; Finer diamond can be used partly as substitute of coarse ones, or even a fraction smaller size can be adopted, which can reduce the cost with better performance especially for drilling medium to hard formation (grade 8-10); Many factors should be considered when designing the width of interlayer, and usually it should be 1/5 to 1/4 that of the kerfs. The problem of short working life of core bit because of wearing out of the inner wear-resistant layer can be solved by adding 5% to 8% RVD2 of 70/80 mesh to strengthen the inner layer or the width of inner layer being 1/3 that of the kerfs. Such experience is beneficial to the manufacturing technology of Sandwich-structured Diamond Core Bits. |
| keywords:sandwich structure diamond bit bulk cracking matrix hardness diamond grit |
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