公开(公告)号：USD525995S1

公开(公告)日：2006-08-01

申请号：US29212831

申请日：2004-09-09

申请人： Fredrik Bjork ,  Bertil Ederyd ,  Kenneth Larsson

设计人： Fredrik Bjork ,  Bertil Ederyd ,  Kenneth Larsson

公开(公告)号：US20050161264A1

公开(公告)日：2005-07-28

申请号：US10509658

申请日：2003-03-26

申请人： Fredrik Bjork

发明人： Fredrik Bjork

IPC分类号： E21B10/56 ,  E21B10/36

CPC分类号： E21B10/56

摘要： A percussion drill bit for drilling a bore includes a drill body having a connecting section at a rear end thereof for connection to a percussive unit, and a plurality of cemented carbide buttons embedded in a front end of the drill body. Each button comprises a cemented carbide body having a rear mounting portion embedded in the drill body, and a front end protruding from the drill body. The front end of the cemented carbide button is substantially semi-spherically curved and defined by a radius whose origin is disposed axially rearwardly of a plane through the largest diameter of the button. The button projects from the drill bit body a distance which is not less than 50% of the button diameter. A conical intermediate surface forms, in cross-section, an acute angle of about 13-19° with an envelope surface of the rear mounting portion.

摘要翻译： 用于钻孔的冲击钻头包括钻头主体，其在其后端具有用于连接到冲击单元的连接部分，以及嵌入在钻头主体的前端中的多个硬质合金按钮。 每个按钮包括硬质合金本体，其具有嵌入在钻体中的后安装部分和从钻头体突出的前端。 硬质合金钮扣的前端基本上半球形弯曲，并由半径限定，其半径通过按钮最大直径的平面轴向向后设置。 该按钮从钻头体上突出不少于按钮直径的50％的距离。 锥形中间表面以横截面形成大约13-19°的锐角，并具有后安装部分的包络面。

公开(公告)号：US20070137900A1

公开(公告)日：2007-06-21

申请号：US10569198

申请日：2004-11-10

申请人： Fredrik Bjork

发明人： Fredrik Bjork

IPC分类号： E21B10/36

CPC分类号： E21B10/38

摘要： The present invention relates to a rock drill bit (1) for percussive drilling. The drill bit comprises a bit body (2); a head portion (3) defining a longitudinal center axis (CL). The head portion comprises a front face (24) having an outer surface portion (25), and an inner surface portion (26) disposed radially inside of the outer surface portion. The inner surface portion is partially recessed by a cavity (27) with respect to the outer surface portion (25). A plurality of fluid channels (16-18) extends through the head portion and communicates with the cavity (27) for conducting a flushing medium thereto. The inner surface portion (24) comprises a raised portion (28) carrying a plurality of buttons (13-15). An imaginary circle (C) intersects centres of the fluid channels (16-18) and also intersects an equal number of buttons (13).

摘要翻译： 本发明涉及一种用于冲击钻孔的凿岩钻头（1）。 钻头包括钻头体（2）; 限定纵向中心轴线（CL）的头部（3）。 头部包括具有外表面部分（25）的前表面（24）和设置在外表面部分的径向内侧的内表面部分（26）。 内表面部分相对于外表面部分（25）由腔（27）部分地凹入。 多个流体通道（16-18）延伸穿过头部并与空腔（27）连通，用于将冲洗介质导入其中。 内表面部分（24）包括承载多个按钮（13-15）的凸起部分（28）。 假想圆（C）与流体通道（16-18）的中心相交，并且与相等数量的按钮（13）相交。

公开(公告)号：US20060060389A1

公开(公告)日：2006-03-23

申请号：US11206822

申请日：2005-08-19

申请人： Per-Ola Hadin ,  Fredrik Bjork

发明人： Per-Ola Hadin ,  Fredrik Bjork

IPC分类号： E21B10/36

CPC分类号： E21B10/38 ,  E21B10/56

摘要： A rock drill bit for percussive drilling includes a front face which has radially outer and inner portions. Fluid channels are disposed in the head portion in communication with the inner portion of the front face. The inner portion of the front face carries a plurality of front buttons. The outer portion comprises circumferentially spaced steel portions which are axially raised relative to the inner portion. Each raised portion carries one or two peripheral buttons located radially outwardly of an imaginary circle which intersects at least two of the front buttons and at least two of the flushing channels. The imaginary circle is arranged coaxially relative to the center axis.

摘要翻译： 用于冲击钻的岩石钻头包括具有径向外部和内部的前表面。 流体通道设置在与前表面的内部部分连通的头部中。 前表面的内部带有多个前按钮。 外部包括相对于内部部分轴向升高的周向间隔开的钢部分。 每个凸起部分承载一个或两个周边按钮，其位于与前按钮和至少两个冲洗通道中的至少两个相交的假想圆的径向外侧。 假想圆相对于中心轴线同轴布置。