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公开(公告)号：US20090095536A1
公开(公告)日：2009-04-16
申请号：US12179989
申请日：2008-07-25
IPC分类号： E21B10/18
CPC分类号： E21B10/18
摘要： A drill bit for drilling through an earthen formation to form a borehole with a radius R. In an embodiment, the drill bit comprises a bit body having a central bit axis and including a pin end, an internal plenum, and a dome side. The dome side includes a central dome region extending from the bit axis to about 10% of the radius R and an intermediate dome region extending from the central region to about 50% of the radius R. In addition, the drill bit comprises an intermediate receptacle having a central axis and extending through the intermediate dome region. Further, the drill bit comprises a first and a second rolling cone, each including an intermediate cone region. A projection of the central axis of the intermediate receptacle passes between the intermediate regions of the first cone and the second cone.
摘要翻译： 钻头，用于通过土层钻孔以形成具有半径R的钻孔。在一个实施例中，钻头包括具有中心钻头轴线并包括销端，内部增压室和圆顶侧的钻头体。 圆顶侧包括从钻头轴线延伸到半径R的约10％的中心圆顶区域和从中心区域延伸到半径R的约50％的中间圆顶区域。另外，钻头头包括中间容器 具有中心轴线并延伸穿过中间圆顶区域。 此外，钻头包括第一和第二滚动锥体，每个包括中间锥体区域。 中间容器的中心轴线的突出部通过第一锥体和第二锥体的中间区域之间。
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公开(公告)号：US08091654B2
公开(公告)日：2012-01-10
申请号：US12104856
申请日：2008-04-17
CPC分类号： E21B10/18
摘要： A drill bit for drilling through an earthen formation to form a borehole includes a bit body having a central axis, an internal plenum, and an underside. The underside includes an annular outer region. The bit body includes an outer receptacle extending from the plenum to the outer region. In addition, the drill bit comprises a first and a second cone cutter. Each cone cutter comprises an outer region distal the bit axis. Further the drill bit comprises an outer sleeve having an upstream end received by the outer sleeve receptacle and a through passage. The through passage includes an upstream section having an upstream axis and a downstream section having a downstream axis that is skewed at an angle α relative to the upstream axis. A projection of the downstream axis passes between the outer regions of the first and second cone cutters.
摘要翻译： 用于钻穿土层以形成钻孔的钻头包括具有中心轴线，内部增压室和下侧的钻头体。 下侧包括环形外部区域。 钻头体包括从集气室延伸到外部区域的外部容器。 此外，钻头包括第一和第二锥形切割器。 每个锥形切割器包括远离钻头轴线的外部区域。 此外，钻头包括外套筒，其具有由外套筒容座和通孔通过的上游端。 贯通通道包括具有上游轴线的上游部分和具有相对于上游轴线以一定角度α倾斜的下游轴线的下游部分。 下游轴的突出部通过第一和第二锥形切割器的外部区域之间。
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公开(公告)号：US07913778B2
公开(公告)日：2011-03-29
申请号：US12179989
申请日：2008-07-25
IPC分类号： E21B10/18
CPC分类号： E21B10/18
摘要： A drill bit for drilling through an earthen formation to form a borehole with a radius R. In an embodiment, the drill bit comprises a bit body having a central bit axis and including a pin end, an internal plenum, and a dome side. The dome side includes a central dome region extending from the bit axis to about 10% of the radius R and an intermediate dome region extending from the central region to about 50% of the radius R. In addition, the drill bit comprises an intermediate receptacle having a central axis and extending through the intermediate dome region. Further, the drill bit comprises a first and a second rolling cone, each including an intermediate cone region. A projection of the central axis of the intermediate receptacle passes between the intermediate regions of the first cone and the second cone.
摘要翻译： 钻头，用于通过土层钻孔以形成具有半径R的钻孔。在一个实施例中，钻头包括具有中心钻头轴线并包括销端，内部增压室和圆顶侧的钻头体。 圆顶侧包括从钻头轴线延伸到半径R的约10％的中心圆顶区域和从中心区域延伸到半径R的约50％的中间圆顶区域。另外，钻头头包括中间容器 具有中心轴线并延伸穿过中间圆顶区域。 此外，钻头包括第一和第二滚动锥体，每个包括中间锥体区域。 中间容器的中心轴线的突出部通过第一锥体和第二锥体的中间区域之间。
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