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    METHODOLOGIES FOR MANUFACTURING SHORT MATRIX BITS
    53.
    发明公开
    METHODOLOGIES FOR MANUFACTURING SHORT MATRIX BITS 审中-公开
    制造短矩阵位的方法

    公开(公告)号：EP2981665A1

    公开(公告)日：2016-02-10

    申请号：EP14778318.7

    申请日：2014-03-19

    Applicant: Varel International, Ind., L.P.

    Inventor： AMUNDSEN, Marvin, Windsor ,  JOHNSON, Charles, Daniel

    IPC: E21B10/00

    CPC classification number: E21B10/00 ,  B23K1/002 ,  B23K1/008 ,  B23K10/02 ,  B23K15/0046 ,  B23K20/129 ,  B23K26/20 ,  B23K2201/002 ,  E21B10/42

    Abstract: A downhole tool and method for manufacturing such downhole tool. The downhole tool includes a bit body having a blank and a matrix bonded to and surrounding the blank, a shank having a threaded connection at one end, and a butt joint formed within a gap formed between the blank and the shank and coupling the blank to the shank. The blank includes a first planar surface while the shank includes a second planar surface opposite the one end. The butt joint is formed between the first and second planar surfaces when positioned adjacent to one another, wherein the first planar surface is positioned external to the matrix.

    Abstract translation: 一种用于制造这种井下工具的井下工具和方法。 井下工具包括钻头本体，该钻头本体具有坯件和粘合到并围绕坯件的基体，一端具有螺纹连接的柄部以及形成在坯件和柄部之间形成的间隙内的对接接头，并将坯件连接到 小腿。 坯件包括第一平坦表面，而柄部包括与该一端相对的第二平坦表面。 当定位成彼此相邻时，对接接头形成在第一和第二平面表面之间，其中第一平面表面位于矩阵的外部。

    Protective Overlay Coating for PDC Drill Bits
    56.
    发明公开
    Protective Overlay Coating for PDC Drill Bits 有权
    Verscleissfeste BeschichtungfürPDC-Bohrköpfe

    公开(公告)号：EP1318268A1

    公开(公告)日：2003-06-11

    申请号：EP02102485.6

    申请日：2002-10-25

    Applicant: SMITH INTERNATIONAL, INC.

    Inventor： Oldham, Thomas W. ,  Kembaiyan, Kumar T.

    IPC: E21B10/54

    CPC classification number: E21B10/55 ,  B23K31/025 ,  B23K2201/002

    Abstract: In one embodiment, a method of increasing a durability of a drill bit having a bit body with at least one blade disposed thereon, at least one cutter pocket disposed on the blade, and at least one cutter disposed in the cutter pocket is disclosed. The method includes brazing the at least one cutter to the at least one cutter pocket so that a braze material disposed between the at least one cutter pocket and the at least one cutter comprises an exposed surface, and overlaying at least a portion of the exposed surface with a hardfacing material, wherein the hardfacing material includes a binder having a melting point selected to avoid damaging the cutter. In one embodiment, a rock bit including a matrix bit body having at least one blade thereon, at least one cutter pocket disposed on the blade, at least one cutter disposed in the cutter pocket, a braze material disposed between the cutter and the pocket, the braze material having an exposed surface, and an overlay coating applied proximate to the at least one cutter, wherein the overlay coating is adapted to cover an exposed surface of braze material proximate to the at least one cutter is disclosed.

    Abstract translation: 在一个实施例中，公开了一种增加具有设置在其上的至少一个刀片的钻头体的钻头的耐用性的方法，设置在刀片上的至少一个刀具凹口以及设置在刀具槽中的至少一个刀具。 所述方法包括将至少一个切割器钎焊到所述至少一个切割器凹部，使得设置在所述至少一个切割器凹槽和所述至少一个切割器之间的钎焊材料包括暴露表面，并且覆盖所述暴露表面的至少一部分 具有表面硬化材料，其中表面硬化材料包括具有选择的熔点的粘合剂，以避免损坏切割器。 在一个实施例中，包括其上具有至少一个叶片的矩阵钻头体的岩石钻头，设置在叶片上的至少一个切割器凹槽，设置在切割器凹槽中的至少一个切割器，设置在切割器和凹槽之间的钎焊材料， 所述钎焊材料具有暴露的表面，以及施加在所述至少一个切割器附近的覆盖涂层，其中所述覆盖涂层适于覆盖靠近所述至少一个切割器的钎焊材料的暴露表面。

    Method of positioning bit sections for welding
    58.
    发明公开
    Method of positioning bit sections for welding 失效
    一种用于Zusammenschweissens的目的Gesteinmeissels的零件的定位方法。

    公开(公告)号：EP0080967A1

    公开(公告)日：1983-06-08

    申请号：EP82630105.3

    申请日：1982-11-05

    Applicant: HUGHES TOOL COMPANY-USA

    Inventor： Atkinson, Gerald O.

    IPC: E21B10/20 ,  B23K37/04 ,  B23K15/00

    CPC classification number: B23K15/0013 ,  B23K37/0426 ,  B23K2201/002 ,  E21B10/20 ,  Y10T29/49895

    Abstract: A method of assembling sections of an earth boring bit for welding has features to assure precise bit geometry. The method includes a step of providing a hole (41) in each bit section at the centerline (35) of the 120 degree faces on the interiors of the sections. A triad (45) is constructed for use in assembly and consists of three pins (47) joined together on one end, each having an axis 120 degrees apart from the other axes of the pins. The triad (45) is positioned in the holes in the 120 degree faces when the three sections of the bit are brought together. The shank ends of the sections have holes (29) for receiving dowels located in the welding fixture. Once the sections are positioned and pinned against movement at the shank ends and at the triad, the sections are clamped, then welded.

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