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    • 3. 发明授权
    • Matrix drill bits with back raked cutting elements
    • 带背面切削元件的矩阵钻头
    • US07946362B2
    • 2011-05-24
    • US11687472
    • 2007-03-16
    • Nuno Da SilvaValérie SillenNicolas Luyckx
    • Nuno Da SilvaValérie SillenNicolas Luyckx
    • E21B10/54
    • E21B10/42
    • A matrix drill bit and method of manufacturing a matrix bit having back raked cutting elements is disclosed. In one aspect, a matrix drill bit for well drilling includes a matrix bit body that has a front area in a direction of drilling and two or more diamond impregnated cutting blades protruding from the front area of the matrix bit body. The cutting blades each have a front external surface protruding from the front area of the matrix bit body and present a plurality of back raked downhole interface surfaces in the direction of drilling. The downhole interface surfaces span a leading face and a trailing face where the leading face extends to a first height and the trailing face extends to a second height and the first height is greater than the second height.
    • 公开了一种矩阵钻头和制造具有背斜切割元件的矩阵钻头的方法。 在一个方面,用于钻井的矩阵钻头包括矩阵钻头体,其具有在钻孔方向上的前区域和从矩阵钻头体的前部区域突出的两个或多个金刚石浸渍切割刀片。 切割刀片各自具有从矩阵钻头体的前部区域突出的前部外表面,并在钻孔方向上呈现多个后倾的井下界面表面。 井下接口表面跨越前导面和后表面,其中前表面延伸到第一高度,并且后表面延伸到第二高度,并且第一高度大于第二高度。