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公开(公告)号：US09657527B2
公开(公告)日：2017-05-23
申请号：US14585698
申请日：2014-12-30
发明人： Robert J. Buske , John F. Bradford
CPC分类号： E21B10/14 , E21B10/06 , E21B10/083 , E21B10/16
摘要： Drill bits with at least two roller cones of different diameters and/or utilizing different cutter pitches in order to reduce bit tracking during drilling operations are described. In particular, earth boring drill bits are provided, the bits having two or more roller cones, and optionally one or more cutter blades, the bits being arranged for reducing tracking by the roller cone teeth during operation by adjusting the teeth spacing, cone pitch angle, and/or the diameter of one or more of the cones. These configurations enable anti-tracking behavior and enhanced drilling efficiency during bit operation.
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公开(公告)号：US20130313021A1
公开(公告)日：2013-11-28
申请号：US13678521
申请日：2012-11-15
发明人： Anton F. Zahradnik , Robert J. Buske , Rudolf C. Pessier , Don Q. Nguyen , Karlos Cepeda , Michael S. Damschen , Mitchell A. Rothe , Johnathan Howard , Gregory C. Prevost , Chaitanya K Vempati , John F. Bradford
CPC分类号： E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/26 , E21B10/28 , E21B10/52 , E21B10/55
摘要： An earth boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drillstring; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from the center of the bit outward toward the gage of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, the apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the is center of the bit.
摘要翻译： 描述了一种钻孔钻头，钻头具有中心纵向轴线的中心纵向轴线，该中心纵向轴线限定钻头体的轴向中心，并且在其上部区域上构造以连接到钻柱中; 至少一个主要固定刀片从钻头体向下延伸并向内朝向钻头的中心轴线但不接近钻头; 从钻头的中心轴线的径向向外延伸的至少一个次级固定刀片; 多个固定切割元件，固定到主固定刀片和次固定刀片; 至少一个位腿固定在钻头体上; 以及安装用于在所述钻头腿上旋转的滚动刀具; 其中至少一个固定刀片上的固定切割元件从钻头的中心向外延伸到钻头的量规，但是不包括计量切割区域，并且其中至少一个滚子锥形切割器部分基本上从钻头的计量 区域向内朝向钻头的中心，滚子锥形切割器的顶点靠近至少一个次级固定刀片的终端，但不延伸到钻头的中心。
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公开(公告)号：US10072462B2
公开(公告)日：2018-09-11
申请号：US15097539
申请日：2016-04-13
发明人： Anton F. Zahradnik , Rudolf C. Pessier , Mitchell A. Rothe , Don Q. Nguyen , Karlos Cepeda , Michael S. Damschen , Robert J. Buske , Johnathan Howard , John F. Bradford , Gregory C. Prevost , Chaitanya K. Vempati
IPC分类号： E21B10/08 , E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/28 , E21B10/52 , E21B10/26 , E21B10/55
CPC分类号： E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/26 , E21B10/28 , E21B10/52 , E21B10/55
摘要： An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from a center of the bit outward toward a gage region of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, an apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.
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公开(公告)号：US09353575B2
公开(公告)日：2016-05-31
申请号：US13678521
申请日：2012-11-15
发明人： Anton F. Zahradnik , Robert J. Buske , Rudolf C. Pessier , Don Q. Nguyen , Karlos Cepeda , Michael S. Damschen , Mitchell A. Rothe , Johnathan Howard , Gregory C. Prevost , Chaitanya K Vempati , John F. Bradford
CPC分类号： E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/26 , E21B10/28 , E21B10/52 , E21B10/55
摘要： An earth boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drillstring; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from the center of the bit outward toward the gage of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, the apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.
摘要翻译： 描述了一种钻孔钻头，钻头具有中心纵向轴线的中心纵向轴线，该中心纵向轴线限定钻头体的轴向中心，并且在其上部区域上构造以连接到钻柱中; 至少一个主要固定刀片从钻头体向下延伸并向内朝向钻头的中心轴线但不接近钻头; 从钻头的中心轴线的径向向外延伸的至少一个次级固定刀片; 多个固定切割元件，固定到主固定刀片和次固定刀片; 至少一个位腿固定在钻头体上; 以及安装用于在所述钻头腿上旋转的滚动刀具; 其中至少一个固定刀片上的固定切割元件从钻头的中心向外延伸到钻头的量规，但是不包括计量切割区域，并且其中至少一个滚子锥形切割器部分基本上从钻头的计量 区域向内朝向钻头的中心，滚子锥形切割器的顶点靠近至少一个辅助固定刀片的终端，但不延伸到钻头的中心。
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公开(公告)号：US10190366B2
公开(公告)日：2019-01-29
申请号：US15137294
申请日：2016-04-25
发明人： Anton F. Zahradnik , Robert J. Buske , Rudolf C. Pessier , Don Q. Nguyen , Karlos Cepeda , Michael S. Damschen , Mitchell A. Rothe , Johnathan Howard , Gregory C. Prevost , Chaitanya K. Vempati , John F. Bradford
IPC分类号： E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/28 , E21B10/52 , E21B10/26 , E21B10/55
摘要： An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from a center of the bit outward toward a gage region of the bit but do not include a gage cutting region, and wherein at least one roller-cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, an apex of the roller-cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.
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公开(公告)号：US20160230467A1
公开(公告)日：2016-08-11
申请号：US15097539
申请日：2016-04-13
发明人： Anton F. Zahradnik , Rudolf C. Pessier , Mitchell A. Rothe , Don Q. Nguyen , Karlos Cepeda , Michael S. Damschen , Robert J. Buske , Johnathan Howard , John F. Bradford , Gregory C. Prevost , Chaitanya K. Vempati
CPC分类号： E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/26 , E21B10/28 , E21B10/52 , E21B10/55
摘要： An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from the center of the bit outward toward the gage of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, the apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.
摘要翻译： 描述了一种钻孔钻头，该钻头具有中心纵向轴线的中心纵向轴线，该中心纵向轴线限定钻头体的轴向中心并且在其上部区域上构造以连接到钻柱中; 至少一个主要固定刀片从钻头体向下延伸并向内朝向钻头的中心轴线但不接近钻头; 从钻头的中心轴线的径向向外延伸的至少一个次级固定刀片; 多个固定切割元件，固定到主固定刀片和次固定刀片; 至少一个位腿固定在钻头体上; 以及安装用于在所述钻头腿上旋转的滚动刀具; 其中至少一个固定刀片上的固定切割元件从钻头的中心向外延伸到钻头的量规，但是不包括计量切割区域，并且其中至少一个滚子锥形切割器部分基本上从钻头的计量 区域向内朝向钻头的中心，滚子锥形切割器的顶点靠近至少一个辅助固定刀片的终端，但不延伸到钻头的中心。
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