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    MODULAR HYBRID DRILL BIT
    3.
    发明申请
    MODULAR HYBRID DRILL BIT 有权
    模块式混合钻头

    公开(公告)号：US20110120269A1

    公开(公告)日：2011-05-26

    申请号：US13019929

    申请日：2011-02-02

    申请人： Ron D. McCORMICK ,  Rudolf Carl PESSIER ,  Don Q. NGUYEN ,  Tim King Marvel ,  Matthew R. ISBELL ,  Anton F. ZAHRADNIK ,  Karlos B. CEPEDA ,  Michael Steven DAMSCHEN ,  Steven M. WINNON

    发明人： Ron D. McCORMICK ,  Rudolf Carl PESSIER ,  Don Q. NGUYEN ,  Tim King Marvel ,  Matthew R. ISBELL ,  Anton F. ZAHRADNIK ,  Karlos B. CEPEDA ,  Michael Steven DAMSCHEN ,  Steven M. WINNON

    IPC分类号： B21K5/04

    CPC分类号： E21B10/14 ,  E21B10/24 ,  E21B10/62 ,  Y10T29/49947 ,  Y10T29/49948 ,  Y10T29/49963

    摘要： An earth-boring bit comprising a bit body is configured at its upper end for connection into a drillstring. A fixed blade depends axially downwardly from the bit body. An axially extending slot is formed in the bit body adjacent the fixed blade. A bit leg is received and retained in the slot by engagement between the slot and correspondingly shaped bit leg, wherein the bit leg cannot be removed from the slot except by axial movement relative to the bit body. A rolling cutter is secured to the bit leg at its lower extent. A fastener secures the bit leg against movement relative to the bit body and extends through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade. The slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg. The bit body further comprises a shank that is configured for connection into the drillstring at its upper extent and has a generally cylindrical receptacle formed in its lower extent; and a bit body portion having a generally cylindrical upper extent, the receptacle being and dimensioned to receive the upper extent of the bit body, wherein the shank and bit body portions are secured together by welding.

    摘要翻译： 包括钻头体的钻孔位于其上端，用于连接到钻柱中。 固定刀片从钻头体轴向向下。 位于固定刀片附近的钻头体中形成有轴向延伸的槽。 一个小腿被接收并通过槽和对应的成形的位腿之间的接合保持在槽中，其中除了通过相对于钻头体的轴向运动之外，钻头腿不能从槽中移除。 滚刀在其较小的范围内固定在钻头腿上。 紧固件固定钻头腿相对于钻头体的运动，并且延伸穿过钻头腿中的长方形孔并进入钻头体，其中钻头腿可以相对于钻头体轴向移动以调节滚刀相对的突起 到固定刀片。 狭槽限定由第三侧连接的一对大致相对的侧面，大致相对的侧面相互倾斜以限定与钻头腿的形状对应的燕尾榫。 钻头体还包括柄，其构造成用于在其上部部分处连接到钻柱中并且具有形成在其下部范围中的大致圆柱形的容器; 并且具有大致圆柱形的上部的一部分主体部分，该容器的尺寸被设计成可容纳钻头体的上部范围，其中柄部和钻头本体部分通过焊接固定在一起。