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    Laminated and composite impregnated cutting structures for drill bits
    1.
    发明授权
    Laminated and composite impregnated cutting structures for drill bits 有权
    用于钻头的层压和复合浸渍切割结构

    公开(公告)号：US06742611B1

    公开(公告)日：2004-06-01

    申请号：US09583241

    申请日：2000-05-30

    申请人： Roland Illerhaus ,  Gordon A. Tibbitts

    发明人： Roland Illerhaus ,  Gordon A. Tibbitts

    IPC分类号： E21B1036

    CPC分类号： E21B10/5735 ,  Y10T428/12063 ,  Y10T428/12167

    摘要： A laminated cutting element for use on a rotary-type earth-boring drill bit for drilling subterranean formations preferably including at least one first segment formed of a hard, continuous-phase material impregnated with a particulate superabrasive material laminated to and including at least one second segment formed of a continuous-phase material having essentially no particulate superabrasive material impregnated therein. Alternatively, the at least one second segment may have superabrasive and/or abrasive material impregnated therein which is less abrasive than the superabrasive material impregnated in the at least one first segment. Preferably, the continuous-phase material in which the at least one first segment and the at least one second segment are made is a metal matrix material. A further alternative of the present invention includes a single segment formed of a continuous-phase material in which a particulate superabrasive material is impregnated. The alternative single segment has a relatively thin cross-sectional thickness and is securable to a support member preferably fabricated from a tough and ductile material. The support member further includes a bit attachment portion securable to a bit body and a segment-receiving portion adapted to receive and support the superabrasive impregnated segment during drilling. A yet further alternative of the present invention includes a composite segment formed of a continuous-phase material wherein a preselected portion of the segment is impregnated with a particulate superabrasive material.

    摘要翻译： 一种层压切割元件，用于在用于钻探地下地层的旋转式钻地钻头上，优选地包括至少一个第一段，所述第一段由浸渍有颗粒状超级磨料的硬质连续相材料形成，所述颗粒超级磨料层压到并包括至少一个第二 由连续相材料形成的片段，其基本上没有浸渍在其中的颗粒状超级磨料材料。 或者，所述至少一个第二段可以具有浸渍在其中的超级磨料和/或研磨材料，其比浸渍在所述至少一个第一段中的超级磨料材料更少磨损。 优选地，其中制造至少一个第一段和至少一个第二段的连续相材料是金属基质材料。本发明的另一替代方案包括由连续相材料形成的单段，其中 浸渍颗粒超级磨料。 替代的单节段具有相对薄的横截面厚度，并且可固定到优选由韧性和延性材料制成的支撑构件。 支撑构件还包括可固定到钻头体的钻头附接部分和适于在钻井期间接收和支撑超磨料浸渍段的段接收部分。本发明的另一替代方案包括由连续相形成的复合段 材料，其中片段的预选部分用颗粒超级磨料材料浸渍。

    Drill bits with controlled cutter loading and depth of cut
    5.
    发明授权
    Drill bits with controlled cutter loading and depth of cut 有权
    钻头具有受控的切割装载和切割深度

    公开(公告)号：US06298930B1

    公开(公告)日：2001-10-09

    申请号：US09383228

    申请日：1999-08-26

    申请人： L. Allen Sinor ,  Wayne R. Hansen ,  Mark W. Dykstra ,  Craig H. Cooley ,  Gordon A. Tibbitts

    发明人： L. Allen Sinor ,  Wayne R. Hansen ,  Mark W. Dykstra ,  Craig H. Cooley ,  Gordon A. Tibbitts

    IPC分类号： E21B1046

    CPC分类号： E21B10/43 ,  E21B10/573 ,  E21B2010/566

    摘要： 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.

    摘要翻译： 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。

    Swivel/tilting bit crown for earth-boring drills
    6.
    发明授权
    Swivel/tilting bit crown for earth-boring drills 失效
    用于钻孔钻头的旋转/倾斜钻头表冠

    公开(公告)号：US5503236A

    公开(公告)日：1996-04-02

    申请号：US117214

    申请日：1993-09-03

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： E21B7/06 ,  E21B7/08 ,  E21B10/00 ,  E21B17/04 ,  E21B17/05 ,  E21B17/20 ,  F16D3/24 ,  F16D3/44 ,  E21B10/62

    CPC分类号： E21B7/068 ,  E21B10/00 ,  E21B17/04 ,  E21B17/05 ,  E21B17/20 ,  E21B7/064 ,  F16D3/24 ,  F16D3/44

    摘要： 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.

    摘要翻译： 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。

    Cutting elements with enhanced stiffness and arrangements thereof on earth boring drill bits
    7.
    发明授权
    Cutting elements with enhanced stiffness and arrangements thereof on earth boring drill bits 失效
    切削元件具有增强的刚度和布置在地球钻头上

    公开(公告)号：US5435403A

    公开(公告)日：1995-07-25

    申请号：US164481

    申请日：1993-12-09

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： E21B10/42 ,  E21B10/43 ,  E21B10/54 ,  E21B10/55 ,  E21B10/56 ,  E21B10/567 ,  E21B10/573 ,  E21B10/60 ,  E21B10/46

    CPC分类号： E21B10/43 ,  E21B10/55 ,  E21B10/567 ,  E21B10/5735 ,  E21B10/60

    摘要： A cutting element having a substantially planar table of superhard material mounted on a substrate or backing. The superhard material table, the substrate, or an insert placed between those two components provides additional stiffness to the cutting element and resistance to bending and impact loading experienced by the cutting element when drilling a formation. The additional stiffness reduces fracture of the table of superhard material and, if the reinforcing member or portion is formed of an abrasion and erosion resistant material, the cutting element will wear linearly at a reduced rate due to the enhanced volume of such material. The thicker or reinforced portion of the cutting element extends linearly, and if the cutting element is circular, extends diametrically. Cooperative arrangements of such cutting elements are also disclosed.

    摘要翻译： 切割元件具有安装在基底或背衬上的基本平坦的超硬材料台。 超硬材料台，基板或放置在这两个部件之间的插入件为切割元件提供了额外的刚度，并且在钻探地层时对切割元件所经受的弯曲和冲击载荷的抵抗力提供​​了额外的刚性。 额外的刚度可以减少超硬材料台的断裂，如果加强件或部分由耐磨损和耐腐蚀材料形成，则由于这种材料的体积增大，切割元件将以降低的速度线性磨损。 切割元件的较厚或加强部分线性延伸，如果切割元件是圆形的，则直径延伸。 还公开了这种切割元件的协同布置。

    Expandable gage bit for drilling and method of drilling
    8.
    发明授权
    Expandable gage bit for drilling and method of drilling 失效
    用于钻孔的可扩展计量钻头和钻孔方法

    公开(公告)号：US5361859A

    公开(公告)日：1994-11-08

    申请号：US17150

    申请日：1993-02-12

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： E21B10/20 ,  E21B10/32 ,  E21B10/42 ,  E21B10/54 ,  E21B10/55 ,  E21B10/66 ,  E21B10/62

    CPC分类号： E21B10/55 ,  E21B10/20 ,  E21B10/32 ,  E21B10/42 ,  E21B10/66

    摘要： 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.

    摘要翻译： 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。

    Drill bit cutter and method for reducing pressure loading of cutters
    9.
    发明授权
    Drill bit cutter and method for reducing pressure loading of cutters 失效
    钻头刀具和减少刀具压力负荷的方法

    公开(公告)号：US5172778A

    公开(公告)日：1992-12-22

    申请号：US794722

    申请日：1991-11-14

    申请人： Gordon A. Tibbitts ,  Paul Pastusek

    发明人： Gordon A. Tibbitts ,  Paul Pastusek

    IPC分类号： E21B10/56 ,  E21B10/567

    CPC分类号： E21B10/5673

    摘要： A drag-type drill bit for boring an earth formation having a plurality of cutting elements formed thereon. Each cutting element includes a cutting surface having a cutting edge formed thereon. During boring, the cutting edge is embedded into an earth formation so that the formation is received against a portion of the cutting surface. As the cutting surface advances against the formation, a chip forms. The chip has a first surface directed generally toward the cutting surface and a second surface directed generally in the direction of cutting element travel. A number of different embodiments are disclosed which include means formed on and in the cutting surface for communicating drilling fluid pressure via slots or discontinuities to a location on the cutting surface relatively close to the cutting edge. Drilling fluid pressure across the chip is thus equalized thereby preventing the chip from being urged against the cutting surface due to the difference between the formation pressure and the drilling fluid pressure.