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1. 发明公开

EP0633387A2 Earth-boring bit with improved cutting structure 有权
标题翻译： Bohrmeissel mit verbesserter Schneidstruktur。
公开(公告)号：EP0633387A2
公开(公告)日：1995-01-11
申请号：EP94201989.4
申请日：1994-07-08
申请人： BAKER HUGHES INCORPORATED
发明人： Scott, Danny Eugene , Grimes, Robert Earl , Pessier, Rudolf Carl Otto , Isbell, Matthew Ray
IPC分类号： E21B10/16
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit (11) has a bit body (13) and at least one cutter (21,23,25) rotatably secured to the bit body (13). The cutter (21,23,25) has a cutter shell surface including a gage surface (31) intersecting a heel surface (41). A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter (21,23,25) and include a heel row of heel inserts (43) on the heel surface (41) of the cutter (21,23,25) and a gage row of gage inserts (33) on the gage surface (31) of the cutter (21,23,25). At least one scraper insert (51), formed of material more wear-resistant than that of the cutter shell surface, is secured to the cutter shell surface generally at the intersection of the gage and heel surfaces (31,41). The scraper insert (51) includes a gage and heel insert surface (57,55). The gage and heel surfaces (57,55) of the scraper insert (51) converge to define a cutting edge (59) for engagement with the sidewall (205) of the borehole, the insert surface defining a positive rake angle with respect to the sidewall (205) of the borehole of between 0 and 15 degrees. The cutting edge (59) projecting from the heel surface (41) an amount not greater than the lesser of one-half the projection of the heel inserts (43) from the heel surface (41) and 30% of the pitch between the heel inserts (43).
摘要翻译：地镗头具有改进的能力，以保持有效的切削几何形状，因为钻孔钻头作为硬质和软质地层材料的混合物而遇到，并且随着钻头在钻孔操作期间的磨损，包括（a）钻头体; （b）至少一个可旋转地固定到钻头体上并具有旋转轴线的切割器，所述切割器具有切割器外壳表面，至少与跟部表面相交的计量表面; （c）在切割器上以圆周排布置的几个切割齿，在切割器的跟部表面上的后跟排齿和通过干涉包住的规格行插入物。至少一个由材料形成的刮刀插件。比刀具壳表面更耐磨，并且通过在跟部和量规表面的交叉点处与刀具壳表面的过盈配合来固定，并且在其间具有沟槽的一对跟部齿和从愈合表面的突起中间，刮刀插件会聚在一起的规格和跟部插入物表面，以形成切割边缘，用于与钻孔的侧壁接合，并且切割边缘从跟部表面突出一个不大于后跟齿的一半的较小者的距离和30 一对脚跟牙齿之间沟的百分比。

2. 发明公开

EP0447679A2 Anti-balling earth boring bit 有权转让
标题翻译： Sich nicht zusetzender Erdbohrmeissel。
公开(公告)号：EP0447679A2
公开(公告)日：1991-09-25
申请号：EP90125501.8
申请日：1990-12-27
申请人： BAKER HUGHES INCORPORATED
发明人： Isbell, Matthew Ray , Pessier, Rudolf Carl Otto
IPC分类号： E21B10/16
CPC分类号： E21B10/16
摘要： A three cone earth boring bit having circumferential rows of earth disintegrating teeth of wear resistant inserts of selected projection from the cone surfaces, one cone (175) having an inner row (195) separated from a heel row (193) by a narrow circumferential groove and a second cone (179) having a hell-catching row (183) that intermeshes with the narrow groove by an amount (J) to minimize balling. A nozzle directs a jet stream with a high velocity core past the cone and inserts of adjacent cutters to the bore hole bottom to break up the filter cake while the lower velocity skirt strikes the material packed between the inserts of adjacent cones. A row of small diameter, recessed reaming inserts (181) replaces the conventional heel row on the cone (179) having a hell-catching row, thus providing space for the lateral displacement of the material generated between adjacent inserts in the critical hell-catching row.
摘要翻译：一种三锥体钻头，其具有圆锥形的具有圆锥形表面的选定突起的耐磨插入件的地球分解齿，一个锥体（175）具有通过窄的圆周凹槽与后跟排（193）分离的内排（195）以及第二锥体（179），其具有与所述窄槽相互啮合量（J）的地狱捕捉排（183），以最小化球化。喷嘴将具有高速芯的喷射流引导通过锥体并将相邻切割器的插入件插入钻孔底部以分解滤饼，同时较低速度的裙部撞击相邻锥体的插入件之间的材料。一排小直径凹入的铰孔插入件（181）代替具有地狱行的锥体（179）上的常规脚跟行，从而为在关键地狱捕获中相邻插入件之间产生的材料的横向位移提供空间行。

3. 发明授权

EP0633387B1 Earth-boring bit with improved cutting structure 有权
标题翻译：具有改善的切削结构的钻头
公开(公告)号：EP0633387B1
公开(公告)日：2000-05-31
申请号：EP94201989.4
申请日：1994-07-08
申请人： BAKER HUGHES INCORPORATED
发明人： Scott, Danny Eugene , Grimes, Robert Earl , Pessier, Rudolf Carl Otto , Isbell, Matthew Ray
IPC分类号： E21B10/16
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52

4. 发明授权

EP0447679B1 Anti-balling earth boring bit 有权转让
标题翻译：不zusetzender地无聊。
公开(公告)号：EP0447679B1
公开(公告)日：1994-03-02
申请号：EP90125501.8
申请日：1990-12-27
申请人： BAKER HUGHES INCORPORATED
发明人： Isbell, Matthew Ray , Pessier, Rudolf Carl Otto
IPC分类号： E21B10/16
CPC分类号： E21B10/16

5. 发明公开

EP0633387A3 Earth-boring bit with improved cutting structure 有权
标题翻译：钻头具有改进的切削结构。
公开(公告)号：EP0633387A3
公开(公告)日：1995-07-26
申请号：EP94201989.4
申请日：1994-07-08
申请人： BAKER HUGHES INCORPORATED
发明人： Scott, Danny Eugene , Grimes, Robert Earl , Pessier, Rudolf Carl Otto , Isbell, Matthew Ray
IPC分类号： E21B10/16
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit (11) has a bit body (13) and at least one cutter (21,23,25) rotatably secured to the bit body (13). The cutter (21,23,25) has a cutter shell surface including a gage surface (31) intersecting a heel surface (41). A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter (21,23,25) and include a heel row of heel inserts (43) on the heel surface (41) of the cutter (21,23,25) and a gage row of gage inserts (33) on the gage surface (31) of the cutter (21,23,25). At least one scraper insert (51), formed of material more wear-resistant than that of the cutter shell surface, is secured to the cutter shell surface generally at the intersection of the gage and heel surfaces (31,41). The scraper insert (51) includes a gage and heel insert surface (57,55). The gage and heel surfaces (57,55) of the scraper insert (51) converge to define a cutting edge (59) for engagement with the sidewall (205) of the borehole, the insert surface defining a positive rake angle with respect to the sidewall (205) of the borehole of between 0 and 15 degrees. The cutting edge (59) projecting from the heel surface (41) an amount not greater than the lesser of one-half the projection of the heel inserts (43) from the heel surface (41) and 30% of the pitch between the heel inserts (43).

6. 发明公开

EP0447679A3 Anti-balling earth boring bit 有权转让
标题翻译：防止地球镗孔
公开(公告)号：EP0447679A3
公开(公告)日：1992-01-15
申请号：EP90125501.8
申请日：1990-12-27
申请人： BAKER HUGHES INCORPORATED
发明人： Isbell, Matthew Ray , Pessier, Rudolf Carl Otto
IPC分类号： E21B10/16
CPC分类号： E21B10/16
摘要： A three cone earth boring bit having circumferential rows of earth disintegrating teeth of wear resistant inserts of selected projection from the cone surfaces, one cone (175) having an inner row (195) separated from a heel row (193) by a narrow circumferential groove and a second cone (179) having a hell-catching row (183) that intermeshes with the narrow groove by an amount (J) to minimize balling. A nozzle directs a jet stream with a high velocity core past the cone and inserts of adjacent cutters to the bore hole bottom to break up the filter cake while the lower velocity skirt strikes the material packed between the inserts of adjacent cones. A row of small diameter, recessed reaming inserts (181) replaces the conventional heel row on the cone (179) having a hell-catching row, thus providing space for the lateral displacement of the material generated between adjacent inserts in the critical hell-catching row.

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