硬岩超高胎体偏心齿钻头的研制及应用  

Development and application of ultrahigh matrix eccentric‑cutter bits for deep hard rock

作　　者：阮海龙 沈立娜 胡远彪[2] 贾美玲 吴海霞 李春 RUAN Hailong;SHEN Lina;HU Yuanbiao;JIA Meiling;WU Haixia;LI Chun(Beijing Institute of Exploration Engineering,Beijing 100083,China;China University of Geosciences,Beijing 100083,China)

机构地区：[1]北京探矿工程研究所,北京100083 [2]中国地质大学(北京),北京100083

出　　处：《钻探工程》2021年第3期56-60,共5页Drilling Engineering

基　　金：国家重点研发计划资助项目“多金属矿岩心钻探关键技术装备联合研发及示范”(编号:2016YFE0202200)。

摘　　要：本文针对硬地层钻头寿命短、钻进效率低等问题,研制了一种新型超高胎体偏心齿钻头。该钻头通过条状或类条状设计提高了单齿工作压力;偏心布齿设计改善了钻进过程中钻头的切削齿受力状态,不但提高了钻头的强度,而且使得排浆更加通畅;扭面后支撑结构保证了钻头具有最高可至30 mm的超高胎体工作层。在钻头的制造工艺上,将无压烧结、热压烧结与二次镶焊3种工艺进行了有机结合,钻头金刚石热损伤小、钻头胎体强度高,保径优势明显,为深部硬地层高效长寿命钻进提供了技术支撑。In view of the problems with impregnated diamond bits in deep hard formation such as short service life,low drilling efficiency,a new type of ultrahigh matrix eccentric⁃cutter impregnate bit was developed.The working pressure of each impregnated cutter is improved through strip or quasi strip design.The eccentric cutter distribution design improves the cutter stress state during the drilling process,which not only improves the working strength of the bit,but also provides a more smooth mud circulation.The supporting structure ensures that the bit has an ultrahigh matrix working height,which is up to 30mm.The combination of pressureless sintering,hot pressing sintering and secondary inlay welding is carried out.The diamond bit has lower thermal damage,high strength and good gauge protection,which provides technical support for deep hard rock drilling.

关 键 词：超高胎体 偏心齿 无压烧结 热压烧结 金刚石钻头 

分 类 号：P634.41[天文地球—地质矿产勘探]