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    Drill bit for directional drilling in cobble formations
    1.
    发明授权
    Drill bit for directional drilling in cobble formations 有权
    钻头用于在卵石地层中定向钻孔

    公开(公告)号：US06789635B2

    公开(公告)日：2004-09-14

    申请号：US10173995

    申请日：2002-06-18

    申请人： Steven W. Wentworth ,  Robert F. Crane ,  Douglas B. Caraway

    发明人： Steven W. Wentworth ,  Robert F. Crane ,  Douglas B. Caraway

    IPC分类号： E21B1000

    CPC分类号： E21B7/064 ,  E21B7/046 ,  E21B7/06 ,  E21B10/38

    摘要： A drill bit configured for use in horizontal directional boring includes a spoon-shaped body with a rearwardly angled or inclined arcuate front end face that widens from a leading edge to a trailing edge in a circumferential direction, the front face sloping rearwardly from a leading side surface to a trailing edge in a circumferential direction, the leading and trailing side surfaces extending rearwardly in from the front end face. The leading side surface is wider than the trailing side surface. In one configuration, the front end surface and leading side face are each provided with a plurality of carbide inserts or studs which may be arranged in a row.

    摘要翻译： 构造成用于水平定向钻孔的钻头包括勺形体，其具有向后倾斜或倾斜的弓形前端面，其在周向方向上从前缘延伸到后缘，所述前表面从前侧向后倾斜 表面到周向的后缘，前侧表面和后侧表面从前端面向后延伸。 前侧面比后侧面宽。 在一种构造中，前端面和前侧面均设置有可以排列成一排的多个碳化物刀片或螺柱。

    Fixed cutter drill bits with thin, integrally formed wear and erosion resistant surfaces
    4.
    发明授权
    Fixed cutter drill bits with thin, integrally formed wear and erosion resistant surfaces 有权
    固定式切割钻头，具有薄而整体形成的耐磨损和抗腐蚀表面

    公开(公告)号：US6135218A

    公开(公告)日：2000-10-24

    申请号：US265266

    申请日：1999-03-09

    申请人： John D. Deane ,  Douglas B. Caraway

    发明人： John D. Deane ,  Douglas B. Caraway

    IPC分类号： E21B10/54 ,  E21B10/55 ,  E21B10/60 ,  E21B10/46

    CPC分类号： E21B10/55 ,  E21B10/602

    摘要： A fixed-cutter drill bit for boring through earth has a body made predominately of high strength steel with thin erosion and abrasion resistant surfaces integrally formed in the steel in areas likely to encounter abrasive or erosive conditions. The drill bit may be formed by a rapid solid state densification (RSSDPM) process. The drill bit combines the high strength of conventional steel bits with design freedom and hardness equal to or greater than conventional matrix bits. Due to the manner in which the hard particles, such as tungsten carbide, are integrally held in a steel matrix, aggressive fluid hydraulics may be employed with the drill bit without unduly limiting the performance of the drill bit.

    摘要翻译： 用于钻孔通过地面的固定切割钻头具有主要由高强度钢制成的主体，其具有在可能遇到磨蚀或腐蚀性条件的区域中一体形成的薄的耐腐蚀和耐磨表面。 钻头可以通过快速固态致密化（RSSDPM）工艺形成。 钻头结合了传统钢钻头的高强度，设计自由度和硬度等于或大于常规矩阵钻头。 由于诸如碳化钨这样的硬质颗粒一体地保持在钢基体中的方式，可以与钻头一起使用侵蚀性流体液压，而不会不适当地限制钻头的性能。