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    • 1. 发明授权
    • Drill bit for percussive rock drilling
    • 钻头用于冲击钻岩
    • US09500037B2
    • 2016-11-22
    • US13643693
    • 2011-02-11
    • Bo CarlstromJens SundinSusanne Lejon
    • Bo CarlstromJens SundinSusanne Lejon
    • E21B17/042E21B10/36
    • E21B10/36E21B17/0426
    • The invention relates to a drill bit (20) for percussive rock drilling, which comprises: —a drill head (21); —a skirt (24), which has a first end and an opposite second end, the skirt being connected to the drill head at said first end; —a recess (25) extending axially through the skirt from the second end of the skirt towards the first end thereof, the recess being provided with an internal, cylindrical female thread (26); and —an impact surface (27) at the bottom of the recess. Every cross-section of the recess (25) between the impact surface and the part of the recess where the female thread has its full thread profile has a cross-sectional area which is smaller than the cross-sectional area of a cross-section of the recess at the part of the recess where the female thread has its full thread profile.
    • 本发明涉及一种用于冲击钻岩的钻头(20),其包括: - 钻头(21); - 裙部(24),其具有第一端和相对的第二端,裙部在所述第一端处连接到钻头; 从所述裙部的第二端朝向其第一端轴向延伸穿过所述裙部的凹部(25),所述凹部设置有内部圆柱形阴螺纹(26); 和 - 在凹部的底部处的冲击表面(27)。 在冲击表面和内螺纹具有全螺纹轮廓的凹部的部分之间的凹部(25)的每个横截面的横截面面积小于横截面积的横截面积 在凹部的凹部处,内螺纹具有其全螺纹轮廓。
    • 2. 发明申请
    • DRILL BIT FOR PERCUSSIVE ROCK DRILLING
    • 钻石钻头用于钻井钻井
    • US20130213718A1
    • 2013-08-22
    • US13643693
    • 2011-02-11
    • Bo CarlstromJens SundinSusanne Lejon
    • Bo CarlstromJens SundinSusanne Lejon
    • E21B10/36
    • E21B10/36E21B17/0426
    • The invention relates to a drill bit (20) for percussive rock drilling, which comprises: —a drill head (21); —a skirt (24), which has a first end and an opposite second end, the skirt being connected to the drill head at said first end; —a recess (25) extending axially through the skirt from the second end of the skirt towards the first end thereof, the recess being provided with an internal, cylindrical female thread (26); and—an impact surface (27) at the bottom of the recess. Every cross-section of the recess (25) between the impact surface and the part of the recess where the female thread has its full thread profile has a cross-sectional area which is smaller than the cross-sectional area of a cross-section of the recess at the part of the recess where the female thread has its full thread profile.
    • 本发明涉及一种用于冲击钻岩的钻头(20),其包括: - 钻头(21); - 裙部(24),其具有第一端和相对的第二端,裙部在所述第一端处连接到钻头; 从所述裙部的第二端朝向其第一端轴向延伸穿过所述裙部的凹部(25),所述凹部设置有内部圆柱形阴螺纹(26); 和 - 在凹部的底部的冲击表面(27)。 在冲击表面和内螺纹具有全螺纹轮廓的凹部的部分之间的凹部(25)的每个横截面的横截面面积小于横截面积的横截面积 在凹部的凹部处,内螺纹具有其全螺纹轮廓。