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    Rotary drill bits
    5.
    发明授权
    Rotary drill bits 有权
    旋转钻头

    公开(公告)号：US07600589B2

    公开(公告)日：2009-10-13

    申请号：US11947624

    申请日：2007-11-29

    申请人： Anton F. Zahradnik ,  Eric C. Sullivan ,  R. Scot Smith ,  Daniel E. Ruff ,  Danielle V. Roberts ,  Alan J. Massey

    发明人： Anton F. Zahradnik ,  Eric C. Sullivan ,  R. Scot Smith ,  Daniel E. Ruff ,  Danielle V. Roberts ,  Alan J. Massey

    IPC分类号： E21B10/36

    CPC分类号： B23K31/02 ,  E21B10/00 ,  E21B10/42

    摘要： A shank configuration for rotary drill bits, is disclosed for positioning of the shank in relation to the bit body. A tapered surface or feature of the shank may be configured and sized to matingly engage a complementarily shaped surface or feature of the drill bit body and thereby become centered or positioned in relation thereto. A deformable element may be disposed between the shank and bit body. Also, the shank may comprise a material having a carbon equivalent of less than about 0.35%. A multi-pass weld procedure may be employed to affix the shank and bit body to one another wherein welds may be formed so that one weld originates at a circumferential position that differs from the origination circumferential position of its immediately preceding weld by at least about 90%. Further, a stress state may be developed within the multi-pass weld. A method of manufacture is also disclosed.

    摘要翻译： 公开了一种用于旋转钻头的柄构造，用于相对于钻头体定位柄。 柄的锥形表面或特征可以被构造和定尺寸成匹配地接合钻头体的互补成形的表面或特征，从而相对于钻头体中心或定位。 可变形元件可以设置在柄和钻头体之间。 另外，柄部可以包含碳当量小于约0.35％的材料。 可以采用多通焊接方法将柄和钻头体彼此固定，其中可以形成焊缝，使得一个焊缝起始于不同于其紧接在前的焊缝的起始圆周位置的周向位置至少约90° ％。 此外，可以在多遍焊缝内形成应力状态。 还公开了一种制造方法。

    Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture
    6.
    发明授权
    Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture 有权
    旋转钻头柄，旋转钻头如此配备，以及制造方法

    公开(公告)号：US07472764B2

    公开(公告)日：2009-01-06

    申请号：US11090932

    申请日：2005-03-25

    申请人： Anton F. Zahradnik ,  Eric C. Sullivan ,  R. Scot Smith ,  Daniel E. Ruff ,  Danielle V. Roberts ,  Alan J. Massey

    发明人： Anton F. Zahradnik ,  Eric C. Sullivan ,  R. Scot Smith ,  Daniel E. Ruff ,  Danielle V. Roberts ,  Alan J. Massey

    IPC分类号： E21B10/36

    CPC分类号： B23K31/02 ,  E21B10/00 ,  E21B10/42

    摘要： A shank configuration for rotary drill bits is disclosed for positioning of the shank in relation to the bit body. A tapered surface or feature of the shank may be configured and sized to matingly engage a complementarily shaped surface or feature of the drill bit body and thereby become centered or positioned in relation thereto. A deformable element may be disposed between the shank and bit body. Also, the shank may comprise a material having a carbon equivalent of less than about 0.35%. A multi-pass weld procedure may be employed to affix the shank and bit body to one another wherein welds may be formed so that one weld originates at a circumferential position that differs from the origination circumferential position of its immediately preceding weld by at least about 90°. Further, a stress state may be developed within the multi-pass weld. A method of manufacture is also disclosed.

    摘要翻译： 公开了一种用于旋转钻头的柄构造，用于相对于钻头体定位柄。 柄的锥形表面或特征可以被构造和定尺寸成匹配地接合钻头体的互补成形的表面或特征，从而相对于钻头体中心或定位。 可变形元件可以设置在柄和钻头体之间。 另外，柄可以包含碳当量小于约0.35％的材料。 可以采用多通焊接方法将柄和钻头体彼此固定，其中可以形成焊缝，使得一个焊缝起始于不同于其紧接在前的焊缝的起始圆周位置的周向位置至少约90° °。 此外，可以在多遍焊缝内形成应力状态。 还公开了一种制造方法。

    Earth-boring bit having an improved hard-faced tooth structure
    9.
    发明授权
    Earth-boring bit having an improved hard-faced tooth structure 失效
    钻头具有改进的硬面齿结构

    公开(公告)号：US5351771A

    公开(公告)日：1994-10-04

    申请号：US76716

    申请日：1993-06-14

    申请人： Anton F. Zahradnik

    发明人： Anton F. Zahradnik

    IPC分类号： E21B10/50

    CPC分类号： E21B10/50

    摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a plurality of teeth formed integrally thereon and arranged in circumferential rows. Each of the teeth includes an outer end, an outer end, a pair of flanks and a crest substantially transversely connecting the ends and flanks. The crests of the at least one of the plurality of teeth has an inverted radius formed therein at at least one intersection of the ends and crest. A wear-resistant material is applied over at least the crest and a portion of at least the ends and flanks of the at least one of the plurality of teeth, wherein the thickness of the wear-resistant material over the inverted radius is substantially greater than elsewhere on the tooth.

    摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有多个整体形成在其上并以圆周排布置的齿。 每个齿包括外端，外端，一对侧面和基本上横向连接端部和侧面的波峰。 所述多个齿中的至少一个齿的波峰在其端部和波峰的至少一个交叉处形成有倒立的半径。 至少在多个齿的至少一个齿的至少顶端和至少一个的端部和侧面的一部分上施加耐磨材料，其中所述耐磨材料在所述倒置半径上的厚度基本上大于 牙齿上的其他地方

    Drill bit with a dynamic metal seal
    10.
    发明授权
    Drill bit with a dynamic metal seal 有权
    钻头采用动态金属密封

    公开(公告)号：US09316055B2

    公开(公告)日：2016-04-19

    申请号：US13886911

    申请日：2013-05-03

    申请人： Chih Lin ,  Aaron J. Dick ,  Jon D. Schroder ,  Anton F. Zahradnik ,  Alejandro Flores ,  Robert D. Bradshaw

    发明人： Chih Lin ,  Aaron J. Dick ,  Jon D. Schroder ,  Anton F. Zahradnik ,  Alejandro Flores ,  Robert D. Bradshaw

    IPC分类号： E21B10/25 ,  E21B10/22

    CPC分类号： E21B10/25 ,  E21B10/22 ,  E21B2010/225 ,  Y10T29/49826

    摘要： In one aspect, a drill bit is disclosed that in one embodiment may include a bit body, a rotating cutter on the bit body, and a metallic seal between the bit body and the rotating cutter that includes a first seal member, a second seal member having a first end in sealing contact with the first seal member, a second end fixed relative to the first end and a bias member between the first end and the second end that adjusts the load on the first seal member in response to external load applied on the drill bit.

    摘要翻译： 在一个方面，公开了一种钻头，其在一个实施例中可以包括钻头体，钻头体上的旋转切割器以及钻头体和旋转切割器之间的金属密封件，其包括第一密封构件，第二密封构件 具有与所述第一密封构件密封接触的第一端，相对于所述第一端固定的第二端和在所述第一端和所述第二端之间的偏置构件，其响应于施加在所述第一密封构件上的外部负载来调节所述第一密封构件上的载荷 钻头。