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1. 发明授权

EP0511547B1 Rock bit 失效
标题翻译：岩石
公开(公告)号：EP0511547B1
公开(公告)日：1996-12-11
申请号：EP92106450.7
申请日：1992-04-14
申请人： SMITH INTERNATIONAL, INC.
发明人： Crockett, David P. , Hooper, Michael E.
IPC分类号： E21B10/16 , E21B10/52
CPC分类号： E21B10/16 , E21B10/52

2. 发明公开

EP0511547A2 Rock bit 失效
标题翻译： Gesteinsbohrmeissel。
公开(公告)号：EP0511547A2
公开(公告)日：1992-11-04
申请号：EP92106450.7
申请日：1992-04-14
申请人： SMITH INTERNATIONAL, INC.
发明人： Crockett, David P. , Hooper, Michael E.
IPC分类号： E21B10/16 , E21B10/52
CPC分类号： E21B10/16 , E21B10/52
摘要： A rock bit is disclosed having a plurality of rolling cone cutters each having a gage row of inserts oriented to face the borehole bottom for crushing the same, and a second row of heel gage inserts which are oriented to face the borehole sidewall for scraping the same. The heel row inserts are interleaved between the gage row inserts and the cutting surface profile of the heel row inserts overlaps the cutting surface profile of the gage inserts in order to alleviate most of the scraping action normally encountered by gage inserts. The crowns of the heel row inserts are within four millimeters up hole from the crowns of the gage row inserts. The heel inserts are made of a harder material than the gage row inserts for resisting the scraping action against the sidewall of the borehole.
摘要翻译：公开了一种岩石钻头，其具有多个滚动锥形切割器，每个滚动锥形切割器具有定向成面对钻孔底部的用于破碎钻头的插入件的一排插入件，以及第二排跟随量具插入件，其被定向成面向钻孔侧壁以刮擦相同的。后排行插入物在量规插入件之间交错，并且跟部行插入件的切割表面轮廓与计量插入件的切割表面轮廓重叠，以便减轻通常由计量插入件遇到的刮擦动作的大部分。鞋跟行插入物的冠部距离表格插入物的冠部在四毫米以上的孔内。鞋跟插入件由比用于抵抗钻孔侧壁的刮擦作用的量具行插入物更硬的材料制成。

3. 发明公开

EP0511547A3 Rock bit 失效
标题翻译：摇头
公开(公告)号：EP0511547A3
公开(公告)日：1993-04-14
申请号：EP92106450.7
申请日：1992-04-14
申请人： SMITH INTERNATIONAL, INC.
发明人： Crockett, David P. , Hooper, Michael E.
IPC分类号： E21B10/16 , E21B10/52
CPC分类号： E21B10/16 , E21B10/52
摘要： A rock bit is disclosed having a plurality of rolling cone cutters each having a gage row of inserts oriented to face the borehole bottom for crushing the same, and a second row of heel gage inserts which are oriented to face the borehole sidewall for scraping the same. The heel row inserts are interleaved between the gage row inserts and the cutting surface profile of the heel row inserts overlaps the cutting surface profile of the gage inserts in order to alleviate most of the scraping action normally encountered by gage inserts. The crowns of the heel row inserts are within four millimeters up hole from the crowns of the gage row inserts. The heel inserts are made of a harder material than the gage row inserts for resisting the scraping action against the sidewall of the borehole.

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