| 孕镶块式高胎体金刚石钻头的研制 |
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| 引用本文： | 王传留,李建军,孙荣军.孕镶块式高胎体金刚石钻头的研制[J].吉林大学学报(地球科学版),2014,44(4):1276. |
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| 作者姓名： | 王传留 李建军 孙荣军 |
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| 作者单位： | 1.中煤科工集团西安研究院，西安710077;
2.中国水电顾问集团北京勘测设计研究院，北京100024 |
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| 基金项目： | 国家重大科技专项（2011ZX05041-001）；中煤科工集团西安研究院资助项目（2012XAYQN003） |
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| 摘 要： | 为了提高金刚石钻头的时效和寿命，将钎焊法引入到高胎体金刚石钻头的设计和加工中。首先利用热压法加工耐磨性能好的金刚石孕镶块；然后加工自带两层水口和水槽的新型钻头钢体，且两水口之间预留焊接槽；最后采用钎焊法，将金刚石孕镶块焊接到钻头钢体上。野外试验表明，试制的2只Φ75/54.5 mm高胎体金刚石钻头，与现场使用的孕镶金刚石钻头相比，钻进效率分别提高41.7%和8.3%，使用寿命分别提高50.4%和32.9%。采用二次钎焊法加工的金刚石钻头，兼顾了热压法的优点，解决了工作层高度过高导致钻头胎体折断、掉块的难题，明显提高了金刚石钻头的使用寿命。
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| 关 键 词： | 高胎体金刚石钻头 金刚石孕镶块 钎焊法 |
| 收稿时间： | 2013-10-17 |
Development of High Matrix Drill Bit with Impregnated Diamond Block |
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| Wang Chuanliu,Li Jianjun,Sun Rongjun.Development of High Matrix Drill Bit with Impregnated Diamond Block[J].Journal of Jilin Unviersity:Earth Science Edition,2014,44(4):1276. |
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| Authors: | Wang Chuanliu Li Jianjun Sun Rongjun |
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| Institution: | 1.Xi’an Research Institute,China Coal Technology and Engineering Group Corp, Xi’an710077, China;
2.Hydrochina Beijing Engineering Corporation, Beijing100024, China |
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| Abstract: | Brazing method was introduced into designing and manufacturing diamond drill bit with high matrix to improve its drilling efficiency and extend its life. Firstly, impregnated diamond blocks with good wear resistance were manufactured by hot pressing method. Then new steel body of drill bit including multilayer nozzles and water way was designed, and the welding grooves were formed between two nozzles. Lastly, the impregnated diamond blocks were welded in the drill bit steel body. The life of diamond drill bit manufactured by welding method was improved obviously. Field experimental results showed that the drilling efficiency of two Φ75/54.5 mm high matrix diamond bits was increased by 41.7% and 8.3% respectively, their lives were improved by 50.4% and 32.9% respectively compared with the conventional one. The two times braze welding method takes the advantage of hot pressing method, solves the breaking and blocking off problem of drilling bit, and improves its life greatly. |
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| Keywords: | high matrix diamond bit impregnated diamond block welding method |
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