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    • 2. 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。
    • 7. 发明授权
    • Drill bits with controlled cutter loading and depth of cut
    • 钻头具有受控的切割装载和切割深度
    • US06298930B1
    • 2001-10-09
    • US09383228
    • 1999-08-26
    • L. Allen SinorWayne R. HansenMark W. DykstraCraig H. CooleyGordon A. Tibbitts
    • L. Allen SinorWayne R. HansenMark W. DykstraCraig H. CooleyGordon A. Tibbitts
    • E21B1046
    • E21B10/43E21B10/573E21B2010/566
    • A rotary drag bit including exterior features to control the depth of cut by cutters mounted thereon, so as to control the volume of formation material cut per bit rotation as well as the torque experienced by the bit and an associated bottomhole assembly. The exterior features preferably precede, taken in the direction of bit rotation, cutters with which they are associated, and provide sufficient bearing area so as to support the bit against the bottom of the borehole under weight on bit without exceeding the compressive strength of the formation rock. The exterior features may be oriented and configured to function optimally at a predicted rate of penetration, or range of rates, at which the bit may be operated, such rate or rates being further optionally maximized in softer formations in light of the ability of the bit to hydraulically clear a maximum volume of formation cuttings to prevent so-called bit balling.
    • 一种旋转牵引钻头,包括外部特征以控制安装在其上的切割器的切割深度,以便控制每位旋转切割的成形材料的体积以及钻头和相关的井底组件所经历的扭矩。 外部特征优选地在钻头旋转的方向,与它们相关联的切割器之前提供,并且提供足够的承载面积,以便在钻头的重量下支撑钻头的底部而不超过地层的抗压强度 岩。 外部特征可以被定向和配置为以预测的穿透速率或比特的运行范围最佳地起作用,这种速率或速率在软地层中进一步可选地根据钻头的能力而最大化 以液压方式清除最大体积的地层切屑,以防止所谓的钻孔。
    • 8. 发明授权
    • Swivel/tilting bit crown for earth-boring drills
    • 用于钻孔钻头的旋转/倾斜钻头表冠
    • US5503236A
    • 1996-04-02
    • US117214
    • 1993-09-03
    • Gordon A. Tibbitts
    • Gordon A. Tibbitts
    • E21B7/06E21B7/08E21B10/00E21B17/04E21B17/05E21B17/20F16D3/24F16D3/44E21B10/62
    • E21B7/068E21B10/00E21B17/04E21B17/05E21B17/20E21B7/064F16D3/24F16D3/44
    • A drill bit for drilling subterranean formations includes a device to provide a "universal" effect between the shank and crown for self alignment of the crown with the bore hole in the formation. The bit is suitable for downhole assemblies configured for straight drilling, directional drilling and navigational drilling. The device can be incorporated into both drag bits and roller-type "rock" bits. Preferred embodiments include a flexible sub connecting the crown to the shank portion and having reduced stiffness relative to the drill string. Alternatively a spherical universal joint or trunnion type universal is used. Replaceable lugs increase durability and reliability of the universal. The device equalizes the loads on cutters while reducing wear, average loads, and impact loads on cutters. Bore hole diameter and chatter of the bit in the bore hole are reduced, promoting maximum efficiency and rate of penetration as wobble and precession are minimized.
    • 用于钻探地下地层的钻头包括在柄和冠之间提供“通用”效应的装置,用于使冠部与地层中的钻孔自对准。 该钻头适用于直井钻井,定向钻井和导航钻井的井下组件。 该装置可以并入拖曳位和滚子式“摇滚”位。 优选实施例包括将冠部连接到柄部分并且相对于钻柱具有降低的刚度的柔性子部分。 或者,使用球形万向接头或耳轴式通用型。 可更换的凸耳增加了通用的耐用性和可靠性。 该装置使刀具上的负载相等,同时减少刀具上的磨损,平均载荷和冲击载荷。 钻孔中的钻孔直径和钻头的颤动减小,从而在摆动和进动最小化的同时提高最大效率和穿透速度。
    • 10. 发明授权
    • Expandable gage bit for drilling and method of drilling
    • 用于钻孔的可扩展计量钻头和钻孔方法
    • US5361859A
    • 1994-11-08
    • US17150
    • 1993-02-12
    • Gordon A. Tibbitts
    • Gordon A. Tibbitts
    • E21B10/20E21B10/32E21B10/42E21B10/54E21B10/55E21B10/66E21B10/62
    • E21B10/55E21B10/20E21B10/32E21B10/42E21B10/66
    • A drill bit for use with earth drilling equipment, the drill bit having a body and movable cutting members or blades variably positionable between a first position in which the diameter defined by the cutting members is generally equal to or less than the diameter of the drill bit body and a second position in which the diameter defined by the cutting members is greater than the diameter of the drill bit body. The second, expanded position is assumed by the cutting members when they are in contact with the bottom of a hole and are thereby urged upwardly relative to the bit body. The first, retracted position is assumed by the cutting members when the drill bit is being tripped into or out of the hole and, because the cutting members are essentially retracted relative to the bit body, the drill bit does not become jammed downhole. A fixed-blade adaptation of the invention is also contemplated.
    • 一种用于地球钻井设备的钻头,所述钻头具有主体和可变地定位在第一位置之间的可移动切割构件或刀片,其中由所述切割构件限定的直径通常等于或小于所述钻头的直径 主体和第二位置,其中由切割构件限定的直径大于钻头体的直径。 当切割构件与孔的底部接触并且因此相对于钻头体向上推动时,第二扩展位置由切割构件假定。 当钻头进入或离开钻孔时,由切割构件假设第一个缩回位置,并且因为切割构件基本上相对于钻头体缩回,所以钻头不会在井下堵塞。 也考虑了本发明的固定刀片适配。