Drill bit and cutter element having chisel crest with protruding pilot portion
    32.
    发明授权
    Drill bit and cutter element having chisel crest with protruding pilot portion 有权
    具有凿子尖头的钻头和切割元件具有突出的导向部分

    公开(公告)号:US07631709B2

    公开(公告)日:2009-12-15

    申请号:US11619395

    申请日:2007-01-03

    IPC分类号: E21B10/16

    CPC分类号: E21B10/16 E21B10/52

    摘要: A rolling cone drill bit includes a cutter element having a cutting portion with a chisel crest and a pilot portion extending beyond the chisel crest. The pilot portion includes a cutting surface that may be generally conical, or form a second chisel crest. The cutting tip of the pilot portion is supported by buttress portions which emerge from and extend beyond the flanks of the chisel crest to provide additional strength and support for the material of the pilot portion that extends beyond the height of the chisel crest.

    摘要翻译: 滚动圆锥钻头包括具有切割部分的切割器元件,切割部分具有凿子顶部和延伸超过凿顶部的引导部分。 导向部分包括可以是大致圆锥形的切割表面,或形成第二凿顶。 导向部分的切割尖端由从凿顶部的侧面露出并延伸超过凿顶部的侧面的支撑部分支撑,以提供延伸超过凿顶高度的先导部分的材料的附加强度和支撑。

    SINGLE CONE ROCK BIT HAVING INSERTS ADAPTED TO MAINTAIN HOLE GAGE DURING DRILLING
    34.
    发明申请
    SINGLE CONE ROCK BIT HAVING INSERTS ADAPTED TO MAINTAIN HOLE GAGE DURING DRILLING 失效
    钻孔时适用于保持井盖的单根锥形钻头

    公开(公告)号:US20080121435A1

    公开(公告)日:2008-05-29

    申请号:US12027194

    申请日:2008-02-06

    IPC分类号: E21B10/22

    摘要: A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string. A bearing journal depends from the bit body. A single roller cone is rotatably attached to the bearing journal. The roller cone has a plurality of inserts disposed at selected positions about the cone. The journal defines a rotation angle with respect to an axis of rotation of the bit such that the roller cone includes a wall contact zone and a bottom contact zone. At least one of the inserts disposed in the wall contact zone has an extension portion terminating in a substantially planar upper surface.

    摘要翻译: 公开了一种滚子锥钻头,其包括适于联接到钻柱的钻头体。 轴承日志取决于位体。 单个滚子锥体可旋转地附接到轴承轴颈。 辊锥体具有多个插入件,其设置在围绕锥体的选定位置处。 轴颈限定相对于钻头的旋转轴线的旋转角度,使得滚子锥体包括壁接触区域和底部接触区域。 布置在壁接触区域中的插入件中的至少一个具有终止于基本平坦的上表面的延伸部分。

    Multiple inserts of different geometry in a single row of a bit
    35.
    发明授权
    Multiple inserts of different geometry in a single row of a bit 失效
    在一行的单行中具有不同几何的多个插入

    公开(公告)号:US07377332B2

    公开(公告)日:2008-05-27

    申请号:US11692013

    申请日:2007-03-27

    IPC分类号: E21B10/20

    CPC分类号: E21B10/08 E21B10/16 E21B10/52

    摘要: A method for designing a roller cone drill bit having a plurality of cutting elements in a row. The method includes defining a pitch pattern for the plurality of cutting elements such that a first group of adjacent cutting elements are arranged in a first pitch and a second group of adjacent cutting elements are arranged in a second pitch in the row; evaluating the pitch pattern of the plurality of cutting elements in the row; and modifying at least one of the plurality of cutting elements, based on the evaluating the pitch pattern of the plurality of cutting elements.

    摘要翻译: 一种用于设计具有一排中的多个切割元件的滚子锥形钻头的方法。 该方法包括限定多个切割元件的间距图案,使得第一组相邻切割元件以第一间距布置,并且第二组相邻切割元件以该列中的第二间距排列; 评估行中的多个切割元件的俯仰图案; 以及基于评估所述多个切割元件的俯仰图案来修改所述多个切割元件中的至少一个。

    Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs
    36.
    发明授权
    Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs 有权
    评估钻头切削布置的方法及其在圆锥钻头设计中的应用

    公开(公告)号:US07234549B2

    公开(公告)日:2007-06-26

    申请号:US10853869

    申请日:2004-05-26

    IPC分类号: E21B10/16

    CPC分类号: E21B10/16 E21B10/00 E21B10/52

    摘要: A method for evaluating a cutting arrangement for a drill bit includes selecting a cutting element arrangement for the drill bit and calculating a score for the cutting arrangement. This method may be used to evaluate the cutting efficiency of various drill bit designs. In one example, this method is used to calculate a score for an arrangement based on a comparison of an expected bottomhole pattern for the arrangement with a preferred bottomhole pattern. The use of this method has lead to roller cone drill bit designs that exhibit reduce tracking over prior art bits.

    摘要翻译: 用于评估钻头的切割装置的方法包括:选择用于钻头的切割元件布置并计算切割布置的得分。 该方法可用于评估各种钻头设计的切割效率。 在一个示例中,该方法用于基于用于布置的预期井底图案与优选底孔图案的比较来计算布置的得分。 这种方法的使用导致了滚筒锥钻钻头设计,显示出比现有技术钻头减少的跟踪。

    Multiple inserts of different geometry in a single row of a bit
    37.
    发明授权
    Multiple inserts of different geometry in a single row of a bit 失效
    在一行的单行中具有不同几何的多个插入

    公开(公告)号:US07195078B2

    公开(公告)日:2007-03-27

    申请号:US10886474

    申请日:2004-07-07

    IPC分类号: E21B10/20

    CPC分类号: E21B10/08 E21B10/16 E21B10/52

    摘要: A method for designing a roller cone drill bit having a plurality of cutting elements in a row. The method includes defining a pitch pattern for the plurality of cutting elements such that a first group of adjacent cutting elements are arranged in a first pitch and a second group of adjacent cutting elements are arranged in a second pitch in the row; evaluating the pitch pattern of the plurality of cutting elements in the row; and modifying at least one of the plurality of cutting elements, based on the evaluating the pitch pattern of the plurality of cutting elements.

    摘要翻译: 一种用于设计具有一排中的多个切割元件的滚子锥形钻头的方法。 该方法包括限定多个切割元件的间距图案,使得第一组相邻切割元件以第一间距布置,并且第二组相邻切割元件以该列中的第二间距排列; 评估行中的多个切割元件的俯仰图案; 以及基于评估所述多个切割元件的俯仰图案来修改所述多个切割元件中的至少一个。