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公开(公告)号：US5558170A
公开(公告)日：1996-09-24
申请号：US350362
申请日：1994-12-06
IPC分类号： E21B10/56 , E21B10/567 , E21B10/573 , E21B17/10 , E21B10/46
CPC分类号： E21B10/567 , E21B10/573 , E21B17/1092 , E21B2010/566
摘要： A drag bit having a plurality of blades or ribs on its end face has one or more pockets milled into the top surfaces of said blades. A tungsten carbide button or insert is positioned at the gauge diameter to reduce impact on the gauge diameter cutter in each of the fibs. The tungsten carbide button extends to the borehole gauge diameter to stabilize the bit within the borehole to limit bit whirling. The tungsten carbide button extends just forward of at least the final cutter assembly with respect to the direction of bit rotation to take the impact instead of the cutters. An additional tungsten carbide button or a shaped cutter is used along the blades in line with PDC cutting assemblies for limiting the penetration of the PDC cutting assemblies to thereby limit bit whirling or tilting instabilities. A shaped PDC cutter has a beveled edge with a bevel angle greater than the backrake angle of the PDC cutter so that engagement with the borehole wall is made with the tungsten carbide body rather than the PDC cutting portion to thereby function as a penetration limiter. As the bit wears, the PDC cutting portion begins to engage the formation in the same manner as the other PDC cutting assemblies.
摘要翻译： 具有在其端面上的多个叶片或肋的拖曳钻头具有铣削到所述刀片的顶表面中的一个或多个凹坑。 碳化钨按钮或插入件位于规格直径处，以减少每个纤维中的直径切割器的冲击。 碳化钨按钮延伸到钻孔计直径以将钻头稳定在钻孔内以限制钻头旋转。 相对于钻头旋转的方向，碳化钨按钮至少延伸到最终切割器组件的前方，以取代切割器。 沿着刀片使用附加的碳化钨纽扣或成形刀具，与PDC切割组件一致，以限制PDC切割组件的穿透，从而限制钻头旋转或倾斜不稳定性。 成形的PDC切割器具有斜切边缘，其斜角大于PDC切割器的反向角度，使得与钻孔壁的接合由碳化钨本体而不是PDC切割部分制成，从而用作渗透限制器。 当钻头磨损时，PDC切割部分以与其它PDC切割组件相同的方式开始接合结构。
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2.发明授权Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface 失效钻头具有断屑器多晶金刚石紧固件和硬质金属插入件在表面
公开(公告)号：US5449048A
公开(公告)日：1995-09-12
申请号：US312260
申请日：1994-09-26
IPC分类号： E21B10/56 , E21B10/567 , E21B10/573 , E21B17/10 , E21B10/46
CPC分类号： E21B10/567 , E21B10/573 , E21B17/1092 , E21B2010/566
摘要： A drag bit having a plurality of blades or ribs on its end face has one or more pockets milled into the top surfaces of said blades using a ball-nosed end mill to create a plurality of pockets, each having a spherical or a semi-spherical first end and a second end having a semicircular configuration that intersects with the leading edge face of the rib. A bullet-shaped cutting structure having a spherical first end is brazed into each of the pockets. During the manufacturing process, a pin is brazed into cooperating first and second semicircular receptacles in the spherical end of the cutter and in the semi-spherical end of the pocket, respectively, to prevent the cutter assembly from being pushed up out of the pocket during the drilling operation. In an alternative embodiment, a slot is milled into the top surface of the rib to allow use of a ball-nosed end mill having a reduced diameter shank sized to pass through the slot. In yet another embodiment, a tungsten carbide button or insert is position at the gauge diameter to reduce impact on the gauge diameter cutter in each of the ribs. Cutter assemblies are disclosed having a variety of orifices in the PDC cutter face to function as chip breakers during the drilling operation.
摘要翻译： 具有在其端面上的多个叶片或肋的拖曳部分具有使用球形端铣刀铣削到所述刀片的顶表面中的一个或多个凹坑，以产生多个凹穴，每个凹穴具有球形或半球形 第一端和具有与肋的前缘面相交的半圆形构造的第二端。 具有球形第一端的子弹形切割结构钎焊到每个凹穴中。 在制造过程中，销钉分别钎焊到切割器的球形端部和口袋的半球形端部中的配合的第一和第二半圆形容器中，以防止刀具组件在袋中被推出口袋 钻井作业。 在替代实施例中，槽被铣削到肋的顶表面中，以允许使用具有缩小直径柄的球头端铣刀，其尺寸设计成穿过狭槽。 在另一个实施例中，碳化钨钮扣或插入件位于规格直径处，以减少每个肋中对直径切割器的冲击。 公开了在PDC切割面中具有各种孔口的切割器组件，以在钻井操作期间用作切屑断裂器。
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公开(公告)号：US6068072A
公开(公告)日：2000-05-30
申请号：US21012
申请日：1998-02-09
IPC分类号： E21B10/56 , E21B10/573 , E21B10/46
CPC分类号： E21B10/573
摘要： A novel cutting element is disclosed as comprised of at an attachment body and a cutting face, where said attachment body is attached to said cutting face via a high temperature braze joint, the attachment body defining a projection and a grooved area, where said grooved area is disposed between the projection and the cutting face, the resultant cutting element providing both enhanced wear characteristics and stability.
摘要翻译： 公开了一种新颖的切割元件，其包括在附接体和切割面处，其中所述附接体通过高温钎焊接头附接到所述切割面，所述附接体限定突起和凹槽区域，其中所述开槽面积 设置在突起和切割面之间，所得切割元件提供增强的磨损特性和稳定性。
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公开(公告)号：US6026919A
公开(公告)日：2000-02-22
申请号：US129179
申请日：1998-04-16
IPC分类号： E21B10/56 , E21B10/573 , E21B10/12
CPC分类号： E21B10/5735
摘要： An improved disc-shaped cutting element including first and second major flat surfaces and a cutting edge, said element comprised of a hard metal substrate defining an irregular interface bonded to a polycrystalline diamond, where said interface includes a plurality of concentric and redial grooves adapted to receive corresponding protrusions formed on the diamond layer so as to enhance wear like and impact resistance.
摘要翻译： 一种改进的盘形切割元件，包括第一和第二主平坦表面和切割边缘，所述元件由限定与多晶金刚石结合的不规则界面的硬金属基底组成，其中所述界面包括多个同心和重拨槽， 接收形成在金刚石层上的相应突起，以增强耐磨性和耐冲击性。
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公开(公告)号：US06401845B1
公开(公告)日：2002-06-11
申请号：US09583488
申请日：2000-05-31
申请人： Coy M. Fielder
发明人： Coy M. Fielder
IPC分类号： E21B1012
CPC分类号： E21B10/5735
摘要： The present invention is directed to an improved cutting element for use with rotating downhole tools. More specifically, the present invention is directed to a compact cutter which includes unique configurations for the interface regions between the substrate the abrasive element to promote superior impact resistance and adhesion.
摘要翻译： 本发明涉及一种用于旋转井下工具的改进的切割元件。 更具体地，本发明涉及一种紧凑型切割器，其包括用于基材之间的界面区域的独特构造，以提供优异的抗冲击性和粘附性。
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公开(公告)号：US5979577A
公开(公告)日：1999-11-09
申请号：US149196
申请日：1998-09-08
申请人： Coy M. Fielder
发明人： Coy M. Fielder
IPC分类号： E21B10/42 , E21B10/43 , E21B10/54 , E21B10/55 , E21B10/56 , E21B10/567 , E21B10/573 , E21B17/10 , E21B10/16 , E21B10/46
CPC分类号： E21B10/43 , E21B10/55 , E21B10/5673 , E21B10/5735 , E21B17/1092
摘要： A drilling tool operational with a rotational drive source for drilling in a subterranean formation where said tool comprises a body defining a face disposed about a longitudinal axis, a plurality of cutting elements fixedly disposed on and projecting from said tool face and spaced apart from one another, and one or more stabilizing elements disposed on the tool face and defining a beveled surface.
摘要翻译： 一种钻井工具，其与用于在地下地层中钻孔的旋转驱动源一起操作，其中所述工具包括限定围绕纵向轴线设置的面的主体，固定地设置在所述工具面上并从所述工具面突出并且彼此间隔开的多个切割元件 以及设置在工具面上并限定斜面的一个或多个稳定元件。
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公开(公告)号：US5803196A
公开(公告)日：1998-09-08
申请号：US655988
申请日：1996-05-31
申请人： Coy M. Fielder
发明人： Coy M. Fielder
IPC分类号： E21B10/42 , E21B10/43 , E21B10/54 , E21B10/55 , E21B10/56 , E21B10/567 , E21B10/573 , E21B17/10 , E21B10/46
CPC分类号： E21B10/43 , E21B10/55 , E21B10/5673 , E21B10/5735 , E21B17/1092
摘要： The present invention is directed to an improved, stabilized drill bit including a shank disposed about a longitudinal axis for receiving a rotational drive source, a gauge portion and a face portion which includes a number of symmetrically arranged blades which themselves include radially situated cutting elements disposed at an exaggerated cutting angle.
摘要翻译： 本发明涉及一种改进的，稳定的钻头，其包括围绕纵向轴线设置的柄，用于接收旋转驱动源，计量部分和面部部分，其包括多个对称布置的叶片，其本身包括径向设置的切割元件设置 以夸张的切割角度。
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公开(公告)号：US4351401A
公开(公告)日：1982-09-28
申请号：US159181
申请日：1980-06-13
申请人： Coy M. Fielder
发明人： Coy M. Fielder
IPC分类号： E21B10/56 , E21B10/573 , E21B10/46
CPC分类号： E21B10/573
摘要： The invention relates to the design of earth bore-hole drill bits embodying shaped preformed cutters containing hard abrasive materials, such as diamonds, the cutters being mounted in companion preformed sockets in the hard metal bit matrix. The extent of penetration of the preformed cutters into the formation being drilled is controlled by providing surface set diamonds embedded in the matrix at or adjacent to its gage portion, the surface set diamonds projecting from the matrix to a much lesser extent than the preformed cutters. As a result, the surface set diamonds can penetrate into the formation only to the extent determined by engagement of the adjacent face of the matrix with the formation. Although the preformed cutters project from the matrix to a greater distance than the surface set diamonds, their extent of penetration into the formation is no greater than that of the surface set diamonds.
摘要翻译： 本发明涉及包含硬质研磨材料（例如金刚石）的成形预成型切割机的地球钻孔钻头的设计，切割器安装在硬金属钻头矩阵中的预制插座中。 将预成形的切割器穿入正在钻孔的地层中的程度通过提供嵌入基体中的表面镶嵌金刚石或其附近的表面镶嵌金属来控制，表面镶嵌金刚石从基体突出到远小于预成型切割器的程度。 结果，表面镶嵌金刚石只能通过基体相邻面与地层的接合而渗透到地层中。 虽然预制的切割机从矩阵突出到比表面镶嵌钻石更大的距离，但是它们进入地层的程度不大于表面镶嵌钻石的程度。
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公开(公告)号：US06913098B2
公开(公告)日：2005-07-05
申请号：US10301049
申请日：2002-11-21
申请人： Coy M. Fielder , Rogerio H. Silva
发明人： Coy M. Fielder , Rogerio H. Silva
摘要： An improved bi-center with improved directional stability and wear resistance is disclosed, said bit optimally utilizing a plurality of shaped PDC cutting elements selectively situated about the cutting surfaces of the pilot and the reamer to produce a minimal force imbalance, where further said pilot bit and the reamer are force balanced to further reduce imbalance in the operation of the tool.
摘要翻译： 公开了一种具有改进的方向稳定性和耐磨性的改进的双中心，所述位优化地利用选择性地围绕导向器和铰刀的切割表面定位的多个成形PDC切割元件以产生最小的力不平衡，其中所述导向位 并且铰刀是力平衡的，以进一步减少工具的操作不平衡。
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公开(公告)号：US06412579B2
公开(公告)日：2002-07-02
申请号：US09321362
申请日：1999-05-27
申请人： Coy M. Fielder
发明人： Coy M. Fielder
IPC分类号： E21B1026
摘要： A bi-center downhole drilling bit is disclosed, which bit includes a body defining proximal and distal ends, where said distal end defines a pilot and a reamer where the reamer defines a first cutting face having a selected diameter “d” and the pilot defines a second cutting face having a selected diameter less than “d”, where each the first and second cutting faces includes upsets defining proximal and distal surfaces where the distal surfaces are provided with cutting elements and the proximal surfaces are provided with one or more gauge pads.
摘要翻译： 公开了一种双中心井下钻头，该钻头包括限定近端和远端的主体，其中所述远端限定引导件和铰刀，其中铰刀限定具有选定直径“d”的第一切削面，并且导向器限定 具有选定直径小于“d”的第二切割面，其中每个第一和第二切割面都包括限定近端表面和远侧表面的凹陷，其中远端表面设置有切割元件，并且近侧表面设置有一个或多个测量垫 。
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