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    • 42. 发明申请
    • Fracturing different levels within a completion interval of a well
    • 在井的完井间隔内破碎不同的水平
    • US20040050551A1
    • 2004-03-18
    • US10659818
    • 2003-09-11
    • EXXONMOBIL OIL CORPORATION
    • Lloyd G. Jones
    • E21B028/00
    • H04B7/10E21B43/088E21B43/26H01Q3/2611H01Q21/24H04B7/0857H04B7/086
    • Method and apparatus for fracturing different levels of a completion interval in a well. A workstring lowers a fracturing string which, in turn, is comprised of a base pipe which is blank except for perforated sections spaced along its length. Screen may be provided over said sections to block the flow of sand into the base pipe. An alternate flow path (e.g. shunt tubes) extends along the base pipe and has one or more outlets spaced along its length. A slurry is flowed into the annulus surrounding the fracturing string. As liquid is lost from the slurry, sand from the slurry will form bridges at said perforated sections thereby isolating portions of the annulus. Slurry then flows through the shunts tube(s) and out into the isolated portions to fracture the different levels in the completion interval.
    • 在井中破裂不同级别的完井间隔的方法和装置。 工作绳降低了压裂线,该断裂线又由除了沿其长度间隔开的穿孔部分为空白的基管构成。 可以在所述部分上设置筛网以阻挡沙子进入基管中。 交替的流动路径(例如分流管)沿基管延伸并且具有沿其长度间隔开的一个或多个出口。 浆料流入压裂串周围的环形空间。 当液体从浆料中丢失时,来自浆料的砂将在所述穿孔部分形成桥,从而隔离环的部分。 然后,浆料通过分流管流出并进入隔离部分,以在完成间隔中破坏不同的水平。
    • 44. 发明授权
    • Eight-element anti-jam aircraft GPS antennas
    • 八元防卡机GPS天线
    • US06618016B1
    • 2003-09-09
    • US09789467
    • 2001-02-21
    • Peter W. HannanAlfred R. LopezRichard J. Kumpfbeck
    • Peter W. HannanAlfred R. LopezRichard J. Kumpfbeck
    • H01Q128
    • H01Q13/10H01Q1/28H01Q3/2611H01Q9/26H01Q9/28H01Q21/24H01Q21/26H01Q21/29
    • A compact aircraft antenna for reception of GPS signals includes eight elements to provide eight antenna patterns usable for anti-jam signal processing. Four bent monopole elements are configured with vertical portions and horizontal inward-extending portions. The bent monopole elements are arranged for multimode excitation to provide a primary progressive phase omnidirectional right-hand circularly-polarized antenna pattern for basic signal GPS signal reception. Multimode excitation of the bent monopoles also provides omnidirectional left-hand circularly-polarized, uniform phase omnidirectional, and clover leaf auxiliary antenna patterns. Four individual slot element figure-eight type auxiliary antenna patterns are also provided. With availability of these primary and auxiliary patterns, adaptive type anti-jam processing can be employed to actively provide reduced-gain antenna pattern notches or nulls at incident angles of interference or jamming signals.
    • 用于接收GPS信号的紧凑型飞机天线包括八个元件,以提供可用于抗干扰信号处理的八个天线方向图。 四个弯曲单极元件构造有垂直部分和水平向内延伸部分。 弯曲的单极子元件被布置用于多模激励,以提供用于基本信号GPS信号接收的初级逐行相位全向右旋圆极化天线方向图。 弯曲单极子的多模激发还提供全方向的左旋圆极化,均匀相位全向和三叶草辅助天线方向图。 还提供了四个单独的槽元件图八型辅助天线图案。 利用这些主要和辅助模式的可用性,可以采用自适应型抗干扰处理来在干扰或干扰信号的入射角度主动地提供减小增益天线方向凹口或零点。