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    • 10. 发明申请
    • CUTTING TOOL INSERTS
    • 切割工具插件
    • US20120193152A1
    • 2012-08-02
    • US13500167
    • 2010-09-15
    • Mark RussellAndy Ollerenshaw
    • Mark RussellAndy Ollerenshaw
    • E21B10/36
    • E21B10/56E21B10/567E21B10/5673E21B10/627E21B10/633E21B29/002
    • An insert (10) for a cutting tool (100) for use down a well bore comprises a body of a hard material (tungsten carbide) suitable for cutting steel. The body is shaped for formation in a mould that comprises a die (70) and first (74) and second (78) punches and arranged so that the first punch can eject the body after formation from an opening of the die closed during formation by said second punch. The insert has first (12) and second (14) ends whose faces are defined, at least in part, by corresponding faces of the first and second punch. Between them is a longitudinal axis (24) of the insert. The area of the first end is less than the area of the second end. The body has flanks (16) that form ridges (18) extending between the first and second ends. The ridges form cutting edges of the insert. They are separated by V-shaped troughs (20) of said flanks. The ridges taper and spiral about the axis.
    • 用于井下使用的用于切削工具(100)的刀片(10)包括适于切割钢的硬质材料(碳化钨)的主体。 本体被成形为在模具中形成,该模具包括模具(70)和第一(74)和第二(78)冲头,并且布置成使得第一冲头可以在形成期间从模具的开口在形成期间封闭的主体 第二拳 插入件具有至少部分地由第一和第二冲头的对应面限定其面的第一(12)和第二(14)端。 它们之间是插入件的纵向轴线(24)。 第一端的面积小于第二端的面积。 主体具有形成在第一和第二端之间延伸的脊(18)的侧面(16)。 脊形成插入物的切割边缘。 它们由所述侧面的V形槽(20)分开。 脊部围绕轴线逐渐变细并旋转。