公开(公告)号：US4737926A

公开(公告)日：1988-04-12

申请号：US820384

申请日：1986-01-21

申请人： Thang Vo ,  Patrick P. Gelsinger

发明人： Thang Vo ,  Patrick P. Gelsinger

IPC分类号： G06F7/50 ,  G06F7/506 ,  G06F7/508

CPC分类号： G06F7/508

摘要： An improved scheme for generating a carry lookahead is described. An irregular grouping, wherein large bit groups are used in the middle and shorter bit groups are used at the ends, provides for a reduction in carry propagation delay.

摘要翻译： 描述了用于产生进位先行头的改进方案。 在中间使用大位组的不规则分组，在末端使用较短的位组，提供进位传播延迟的减少。

公开(公告)号：US20120193149A1

公开(公告)日：2012-08-02

申请号：US13016332

申请日：2011-01-28

申请人： Tom Roberts ,  Thang Vo ,  Douglas Caraway ,  Craig Ivie

发明人： Tom Roberts ,  Thang Vo ,  Douglas Caraway ,  Craig Ivie

IPC分类号： E21B10/00

CPC分类号： E21B10/18 ,  E21B10/16 ,  E21B10/50

摘要： Disclosed is a rolling cone drill bit with inner row cutting teeth having portions shielded with an erosion-resistant material that differs in material properties from the tooth's core portion that is more impact resistant. The tooth includes shielding on at least a portion of the upstream end and along portions of the flanking surfaces. It includes shield-free portions on the flanks between the root and the tooth crest. Most of the tooth's perimeter is made of the core material and is free of shielding. Gage row teeth may be angled and form a channel to direct drilling fluid from the gage region of the borehole to locations where the inner row teeth are generating most cuttings. Nozzles are provided with non-uniform orientations.

摘要翻译： 公开了一种具有内排切割齿的滚动圆锥钻头，其具有用抗侵蚀材料屏蔽的部分，其材料特性与具有更耐冲击性的齿的芯部分不同。 所述牙齿包括在所述上游端的至少一部分和所述侧面的部分上的屏蔽。 它包括在根部和齿顶之间的侧面上的无屏蔽部分。 牙齿的大部分周边由芯材制成，不受屏蔽。 计量排齿可以成角度并且形成通道，以将钻井液从钻孔的测量区域引导到内排齿产生大多数切屑的位置。 喷嘴具有不均匀的方向。

公开(公告)号：US08733475B2

公开(公告)日：2014-05-27

申请号：US13016332

申请日：2011-01-28

申请人： Thang Vo ,  Tom Scott Roberts ,  Craig Ivie ,  Douglas Caraway

发明人： Thang Vo ,  Tom Scott Roberts ,  Craig Ivie ,  Douglas Caraway

IPC分类号： E21B10/08

CPC分类号： E21B10/18 ,  E21B10/16 ,  E21B10/50

摘要： Disclosed is a rolling cone drill bit with inner row cutting teeth having portions shielded with an erosion-resistant material that differs in material properties from the tooth's core portion that is more impact resistant. The tooth includes shielding on at least a portion of the upstream end and along portions of the flanking surfaces. It includes shield-free portions on the flanks between the root and the tooth crest. Most of the tooth's perimeter is made of the core material and is free of shielding. Gage row teeth may be angled and form a channel to direct drilling fluid from the gage region of the borehole to locations where the inner row teeth are generating most cuttings. Nozzles are provided with non-uniform orientations.

摘要翻译： 公开了一种具有内排切割齿的滚动圆锥钻头，其具有用抗侵蚀材料屏蔽的部分，其材料特性与具有更耐冲击性的齿的芯部分不同。 所述牙齿包括在所述上游端的至少一部分和所述侧面的部分上的屏蔽。 它包括在根部和齿顶之间的侧面上的无屏蔽部分。 牙齿的大部分周边由芯材制成，不受屏蔽。 计量排齿可以成角度并且形成通道，以将钻井液从钻孔的测量区域引导到内排齿产生大多数切屑的位置。 喷嘴具有不均匀的方向。

公开(公告)号：US08607899B2

公开(公告)日：2013-12-17

申请号：US13030513

申请日：2011-02-18

申请人： Thang Vo ,  Tom Scott Roberts ,  Adrian Reyes ,  Robert Morton

发明人： Thang Vo ,  Tom Scott Roberts ,  Adrian Reyes ,  Robert Morton

IPC分类号： E21B10/16

CPC分类号： E21B10/16 ,  E21B10/08 ,  E21B10/50 ,  E21B10/52

摘要： A rolling cone drill bit for cutting a borehole comprises a rolling cone cutter mounted on a bit body and adapted for rotation about a cone axis. Further, the bit comprises a tooth extending from the cone cutter. The tooth includes a base at the cone cutter and an elongate chisel crest distal the cone cutter. The crest extends along a crest median line between a first crest end and a second crest end and includes an elongate crest apex. The tooth also includes a first flanking surface extending from the base to the crest, and a second flanking surface extending from the base to the crest. The first flanking surface and the second flanking surface taper towards one another to form the chisel crest. Moreover, the tooth includes a first raised rib extending continuously along the first flanking surfaces and across the chisel crest to the second flanking surface.

摘要翻译： 用于切割钻孔的滚动钻头钻头包括安装在钻头体上并适于围绕锥体轴线旋转的滚动锥形切割器。 此外，钻头包括从锥形切割器延伸的齿。 牙齿包括在锥形切割器处的基部和远离锥形切割器的细长凿顶部。 波峰沿第一顶端和第二顶端之间的顶部中线延伸并且包括细长的顶点。 齿还包括从基部延伸到顶部的第一侧面表面和从基部延伸到顶部的第二侧面表面。 第一侧面和第二侧面朝向彼此逐渐变细以形成凿孔。 此外，牙齿包括沿着第一侧面连续延伸并跨过凿头顶部延伸到第二侧面的第一凸起肋。

公开(公告)号：US5309382A

公开(公告)日：1994-05-03

申请号：US956867

申请日：1992-10-01

申请人： Leilani Tamura ,  Thang Vo

发明人： Leilani Tamura ,  Thang Vo

IPC分类号： G06F5/01 ,  G06F7/38

CPC分类号： G06F5/015

摘要： A binary shifter which utilizes shifter control logic to shift a 64-bit binary word by shift amounts up to 63 bit positions using a pre-multiplexer and shifter array configuration capable of shifting up to 32 bit positions. The shifter control logic executes two cycles of shifting operations to achieve shift amounts greater than 32 bits. An improved shifter pre-multiplexer and array for shifting 64-bit binary words by up to 32 bit positions in one cycle is disclosed. The improved shifter pre-multiplexer and array uses 9:1 pre-multiplexer cells with tristate outputs to place input data on selected discrete sections of horizontal data lines allowing for a reduced number of cells and control lines.

摘要翻译： 一种二进制移位器，利用移位器控制逻辑，使用能够移位到32位位置的预多路复用器和移位器阵列配置，将64位二进制字移位到63位位置。 移位器控制逻辑执行两个移位操作周期以实现大于32位的移位量。 公开了一种用于在一个周期中将64位二进制字移位多达32位位置的改进的移位器预多路复用器和阵列。 改进的移位器预多路复用器和阵列使用具有三态输出的9：1预多路复用器单元将输入数据放置在水平数据线的选定分立部分上，从而允许减少数量的单元和控制线。

公开(公告)号：US20120211282A1

公开(公告)日：2012-08-23

申请号：US13030513

申请日：2011-02-18

申请人： Thang Vo ,  Tom Scott Roberts ,  Adrian Reyes ,  Robert Morton

发明人： Thang Vo ,  Tom Scott Roberts ,  Adrian Reyes ,  Robert Morton

IPC分类号： E21B10/00

CPC分类号： E21B10/16 ,  E21B10/08 ,  E21B10/50 ,  E21B10/52

摘要： A rolling cone drill bit for cutting a borehole comprises a rolling cone cutter mounted on a bit body and adapted for rotation about a cone axis. Further, the bit comprises a tooth extending from the cone cutter. The tooth includes a base at the cone cutter and an elongate chisel crest distal the cone cutter. The crest extends along a crest median line between a first crest end and a second crest end and includes an elongate crest apex. The tooth also includes a first flanking surface extending from the base to the crest, and a second flanking surface extending from the base to the crest. The first flanking surface and the second flanking surface taper towards one another to form the chisel crest. Moreover, the tooth includes a first raised rib extending continuously along the first flanking surfaces and across the chisel crest to the second flanking surface.

摘要翻译： 用于切割钻孔的滚动钻头钻头包括安装在钻头体上并适于围绕锥体轴线旋转的滚动锥形切割器。 此外，钻头包括从锥形切割器延伸的齿。 牙齿包括在锥形切割器处的基部和远离锥形切割器的细长凿顶部。 波峰沿第一顶端和第二顶端之间的顶部中线延伸并且包括细长的顶点。 齿还包括从基部延伸到顶部的第一侧面表面和从基部延伸到顶部的第二侧面表面。 第一侧面和第二侧面朝向彼此逐渐变细以形成凿孔。 此外，牙齿包括沿着第一侧面连续延伸并跨过凿头顶部延伸到第二侧面的第一凸起肋。

公开(公告)号：US4229743A

公开(公告)日：1980-10-21

申请号：US945055

申请日：1978-09-22

申请人： Thang Vo ,  John R. Lewis, Jr.

发明人： Thang Vo ,  John R. Lewis, Jr.

IPC分类号： H01Q5/00 ,  H01Q5/01 ,  H01Q5/321 ,  H01Q9/30 ,  H01Q1/32 ,  H01Q9/27

CPC分类号： H01Q9/30 ,  H01Q5/321

摘要： An antenna (10) suitable for multiple frequency band utilization includes three impedance elements (11,12 and 13). The second impedance element (12), which may also be called a network (12), includes a coil (L.sub.2) and at least one other conductor (17) in operative association therewith. The second impedance element may be electrically connected to both a first impedance element (11), which may include a linear conductor (14) coupled to a radio, and a third impedance element (13), which may include a coil (L.sub.1). By constructing the network (12) so as to have appropriate dimensions, antenna 10 will have a plurality of natural resonant frequencies substantially within or nearby at least each higher band of frequencies of interest.

摘要翻译： 适用于多频段利用的天线（10）包括三个阻抗元件（11,12和13）。 也可称为网络（12）的第二阻抗元件（12）包括线圈（L2）和与其可操作相关联的至少一个其它导体（17）。 第二阻抗元件可以电连接到可包括耦合到无线电的线性导体（14）的第一阻抗元件（11）和可包括线圈（L1）的第三阻抗元件（13）。 通过构造网络（12）以具有适当的尺寸，天线10将具有基本上在至少每个较高频率频带内或附近的多个固有谐振频率。