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    • 6. 发明授权
    • Cutting element with controlled superabrasive contact area, drill bits so equipped
    • 切割元件具有受控的超级磨料接触面积,钻头如此配备
    • US06202771B1
    • 2001-03-20
    • US08935931
    • 1997-09-23
    • Danny E. ScottRedd H. SmithRalph M. HortonArthur A. Chaves
    • Danny E. ScottRedd H. SmithRalph M. HortonArthur A. Chaves
    • E21B1046
    • E21B10/5735
    • Cutting elements providing a relatively constant superabrasive area in contact with the formation responsive to weight on bit during a substantial portion of the useful life of a circular cutting face cutting element or other cutting element exhibiting a non-linear cutting edge, for example, from about 5% diametrical wear to in excess of about 30% diametrical wear in the case of a circular cutting element, measured across the cutting face. The superabrasive table of the cutting element is configured, internally, externally, or both, to vary in depth radially and laterally, as required, so that an increase in width of the contact or wear flat area with the formation and the variation in table depth as the cutting element wears, are substantially offsetting. The rate of penetration of a drill bit so equipped may thus be maintained at a desirable magnitude without a substantial increase in weight on bit as the cutting element wears, since the superabrasive contact area is maintained relatively constant.
    • 在圆形切割面切割元件或其他显示非线性切割边缘的切割元件的大部分使用寿命期间,响应于钻头上的重量,提供与地层接触的相对恒定的超研磨区域的切割元件,例如从约 在切割面上测量的圆形切割元件的情况下,5%的直径磨损超过约30%的直径磨损。 切割元件的超级磨床在内部,外部或两者上配置,以根据需要在径向和横向上进行深度变化,使得接触的宽度增加或者与地层的平坦区域的磨损以及台面深度的变化 当切割元件磨损时,基本上是偏移的。 因此,由于超级磨料接触面积保持相对恒定,所以如此装备的钻头的穿透速度可以保持在期望的幅度,而不会随着切削元件磨损而在钻头上的重量显着增加。
    • 8. 发明授权
    • Stud design for drill bit cutting element
    • 钻头切割元件的螺柱设计
    • US5431239A
    • 1995-07-11
    • US44938
    • 1993-04-08
    • Gordon A. TibbittsCraig H. CooleyRedd H. SmithPaul E. PastusekRalph M. Horton
    • Gordon A. TibbittsCraig H. CooleyRedd H. SmithPaul E. PastusekRalph M. Horton
    • E21B10/56E21B10/567E21B10/46
    • E21B10/567
    • An improved stud design for an earth boring drill bit is disclosed preferably using materials of different hardness and toughness layered to provide maximum resistance to surface abrasion coupled with excellent structural properties including high strength with maximum fracture toughness. The bit body is conventionally attached to a drill string, and has a crown and gage portion. The studs preferably include a core, made of steel or other material having high fracture toughness, covered at least in part with a hard, abrasion resistant material such as tungsten carbide. Each stud is secured to a socket in the bit body by means of brazing or other suitable means such as a press fit. The cutting element is brazed to a mounting face of the stud prior to affixation of the stud to the bit body and is preferably comprised of a polycrystalline diamond compact adhered to a backing layer of tungsten carbide.
    • 公开了一种用于钻孔钻头的改进的螺柱设计,其使用不同硬度和韧性的材料,其层压以提供对表面磨损的最大阻力,以及优异的结构特性,包括具有最大断裂韧性的高强度。 钻头主体通常安装在钻柱上,并具有表冠和表面部分。 螺柱优选地包括由钢或其他具有高断裂韧性的材料制成的芯,至少部分地用硬的耐磨材料(例如碳化钨)覆盖。 每个螺柱通过钎焊或其他合适的方式如压配合固定在钻头体中的插座上。 在将螺柱固定到钻头体之前,将切割元件钎焊到螺柱的安装面上,并且优选地由粘附到碳化钨背衬层的多晶金刚石块组成。