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1. 发明授权

US4611673A Drill bit having offset roller cutters and improved nozzles 失效
标题翻译：钻头具有胶辊切割机和改进的喷嘴
公开(公告)号：US4611673A
公开(公告)日：1986-09-16
申请号：US553937
申请日：1983-11-21
申请人： John S. Childers , Paul E. Pastusek , Percy W. Schumacher, Jr.
发明人： John S. Childers , Paul E. Pastusek , Percy W. Schumacher, Jr.
IPC分类号： E21B10/16 , E21B10/18 , E21B10/52
CPC分类号： E21B10/18 , E21B10/16 , E21B10/52
摘要： This invention discloses a rolling cone drilling bit comprising a plurality of conical roller cutters having hard metal cutting elements thereon and being so positioned relative to each other that their rotational axes are offset from the rotational axis of the drill bit, and a drilling fluid nozzle system for directing a pressurized fluid stream across certain of the cutting elements and thereafter against the formation generally at the bottom of the well bore so that when the drill bit is used in its most advantageous areas, such as the soft, medium-soft and plastic formations, the nozzle system prevents "balling up" of the cutters and greatly increases the drilling efficiency of the bit.
摘要翻译：本发明公开了一种滚动圆锥钻头，包括多个圆锥滚子切割机，其上具有硬质金属切割元件，并且彼此相对定位，使得它们的旋转轴线偏离钻头的旋转轴线，钻井流体喷嘴系统用于将加压的流体流引导穿过某些切割元件，然后通常在井眼的底部反对形成，使得当钻头在其最有利的区域中使用时，例如软的，中软的和塑性的地层喷嘴系统防止切割器的“滚珠”，并大大提高钻头的钻孔效率。

2. 发明授权

US4444281A Combination drag and roller cutter drill bit 失效
标题翻译：组合牵引和滚刀切割钻头
公开(公告)号：US4444281A
公开(公告)日：1984-04-24
申请号：US480560
申请日：1983-03-30
申请人： Percy W. Schumacher, Jr. , Kenneth W. Jones , Henry W. Murdoch , Paul E. Pastusek
发明人： Percy W. Schumacher, Jr. , Kenneth W. Jones , Henry W. Murdoch , Paul E. Pastusek
IPC分类号： E21B10/14 , E21B10/16 , E21B10/42 , E21B10/43
CPC分类号： E21B10/43 , E21B10/14 , E21B10/16
摘要： A rotary drill bit comprising a bit body having at least one depending leg at its lower end and at least one roller cutter rotatably mounted on the leg. The roller cutter comprises a frustoconical roller cutter body and a plurality of cutting elements projecting from the cutter body to tips adapted to bear on the bottom of the well bore, with the tips defining, upon rotation of the bit, a first cutting surface of the bit extending over substantially the entire area of the bottom of the well bore. At least one drag cutter extends down from the bit body and comprises a support and a plurality of drag cutting elements on the support, each having a lower cutting edge. The cutting edges of these elements are so arranged relative to the tips of the hard metal cutting elements as to define, upon rotation of the bit, a second cutting surface of generally the same configuration as the first but spaced above it, whereby upon drilling a relatively brittle formation only the hard metal cutting elements bear on the formation for cutting the formation by fracturing it thereby protecting the drag cutting elements, and upon drilling a relatively plastically deformable material which the hard metal cutting elements penetrate to a relatively deep depth without causing substantial fracturing of the formation, the drag cutting elements also engage the formation for improved drill bit cutting action and increased rates of drilling penetration.
摘要翻译：一种旋转钻头，包括在其下端具有至少一个悬垂腿的钻头体和可旋转地安装在腿上的至少一个滚子切割机。滚子切割器包括截头圆锥滚子切割器主体和从切割器主体突出到适于承载在井眼的底部上的尖端的多个切割元件，其中尖端在钻头旋转时限定第一切割表面位于基本上位于井眼底部的整个区域上。至少一个拖拉机从钻头体向下延伸并且包括在支撑件上的支撑件和多个牵引切割元件，每个具有下切割刃。这些元件的切割边缘相对于硬金属切割元件的尖端布置成在钻头旋转时限定第二切割表面，该第二切割表面具有与第一切割表面大致相同的构造，但在其上方间隔开，相对脆弱的形成只有硬金属切割元件承受地层的切割，从而通过压裂来保护地层，从而保护拖曳切割元件，并且在钻出相对可塑性变形的材料时，硬质金属切割元件穿透到较深的深度，地层的断裂，牵引切割元件也接合地层以改善钻头切割作用并提高钻孔穿透率。

3. 发明授权

US3971600A Drill bit 失效
标题翻译：钻头
公开(公告)号：US3971600A
公开(公告)日：1976-07-27
申请号：US599817
申请日：1975-07-28
申请人： Henry W. Murdoch , Percy W. Schumacher, Jr.
发明人： Henry W. Murdoch , Percy W. Schumacher, Jr.
IPC分类号： E21B10/24 , F16C33/66
CPC分类号： E21B10/24
摘要： A drill bit having a body with a shaft thereon, a roller cutter, an annular thrust bearing, means for connecting said roller cutter to the thrust bearing, means for retaining said thrust bearing on the shaft, and a lubrication system containing the thrust bearing and the retaining means with the lubrication system seal positioned between the outer edge of the roller cutter and the base of the shaft.
摘要翻译：一种具有其上具有轴的主体的钻头，滚子切割器，环形止推轴承，用于将所述滚子切割器连接到推力轴承的装置，用于将所述止推轴承保持在轴上的装置，以及包含推力轴承和所述保持装置具有位于滚子切割器的外边缘和轴的基部之间的润滑系统密封件。

4. 发明授权

US4446935A Intermittent high-drag oil well drilling bit 失效
标题翻译：间歇式高阻力油井钻头
公开(公告)号：US4446935A
公开(公告)日：1984-05-08
申请号：US420417
申请日：1982-09-20
申请人： Percy W. Schumacher, Jr.
发明人： Percy W. Schumacher, Jr.
IPC分类号： E21B4/00 , E21B10/08 , E21B10/52 , E21B10/56 , E21B10/567 , E21B4/02
CPC分类号： E21B10/567 , E21B10/08 , E21B10/083 , E21B10/52 , E21B4/006
摘要： Methods and apparatus are disclosed for the rapid and efficient drilling of oil well and other types of bore holes through tough abrasive underground formations, which methods and apparatus utilize high drag intermittent contact and cooling techniques to provide good rates of penetration with low wear and heat deterioration on the drilling tools.
摘要翻译：公开了用于通过艰难的磨料地下地层快速高效地钻井油井和其他类型的钻孔的方法和设备，该方法和设备利用高阻力间歇接触和冷却技术来提供良好的渗透率，低磨损和热劣化在钻具上。

5. 发明授权

US4158973A Rolling cutter drill bit 失效
标题翻译：滚刀钻头
公开(公告)号：US4158973A
公开(公告)日：1979-06-26
申请号：US886983
申请日：1978-03-15
申请人： Percy W. Schumacher, Jr. , James A. Minton, Jr. , Frank A. Hollingshead
发明人： Percy W. Schumacher, Jr. , James A. Minton, Jr. , Frank A. Hollingshead
IPC分类号： B23P15/28 , E21B10/20 , B21K5/02
CPC分类号： E21B10/20 , B23P15/28
摘要： A rolling cutter drill bit is disclosed which utilizes a main body having a threaded end for connection in a drill string, and a plurality of rolling cutter assemblies joined to the bottom of the bit body by means such as electron beam welding.
摘要翻译：公开了一种利用具有用于连接在钻柱中的螺纹端的主体以及通过诸如电子束焊接的方法连接到钻头体的底部的多个滚切刀组件的轧制刀具钻头。

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