会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • METHODS OF REDUCING FLUID LOSS IN A WELLBORE SERVICING FLUID
    • 减少井筒维修液中流体损失的方法
    • WO2005061653A1
    • 2005-07-07
    • PCT/US2004/037007
    • 2004-11-08
    • CHEVRON PHILLIPS CHEMICAL COMPANY, LPPATEL, Bharat, B.
    • PATEL, Bharat, B.
    • C09K7/02
    • C09K8/12C09K8/68Y10S507/935
    • Methods of reducing the fluid loss from a wellbore servicing fluid include combining a terpolymer with the wellbore servicing fluid to reduce the fluid loss from the fluid, followed by displacing the fluid into a wellbore. In an embodiment, the following monomers are used to make the terpolymer: from about 75 wt.% to about 95 wt.% of 2-acrylamido-2-methylpropanesulfonic acid or an alkali salt thereof; from about 3 wt.% to about 15 wt.% of acrylamide; and from about 3 wt.% to about 15 wt.% of N-vinyl-2-pyrrolidone, all weight percentages being based on a total weight of the monomers. The wellbore servicing fluid may comprise water or an aqueous salt solution such as a formate solution. The wellbore servicing fluid may also comprise clay such as montmorillonite and attapulgite clay.
    • 从井眼维修流体减少流体损失的方法包括将三元共聚物与井筒维修流体组合以减少流体中的流体损失,随后将流体置换成井眼。 在一个实施方案中,使用以下单体制备三元共聚物:约75重量%至约95重量%的2-丙烯酰胺基-2-甲基丙磺酸或其碱金属盐; 约3重量%至约15重量%的丙烯酰胺; 和约3重量%至约15重量%的N-乙烯基-2-吡咯烷酮,所有重量百分比均基于单体的总重量。 井筒维修流体可以包括水或盐水溶液,例如甲酸盐溶液。 井筒维修流体还可以包括粘土,例如蒙脱石和绿坡缕石粘土。
    • 6. 发明申请
    • MICROWAVE RADIO SYSTEM
    • 微波无线电系统
    • WO1996005661A1
    • 1996-02-22
    • PCT/GB1995001959
    • 1995-08-17
    • CONTINENTAL MICROWAVE TECHNOLOGY LIMITEDCOWAN, David, AlexanderPATEL, Bharat
    • CONTINENTAL MICROWAVE TECHNOLOGY LIMITED
    • H04B01/50
    • H03D7/163H04B1/50
    • A transmitter/receiver circuit for one station of a microwave radio system comprising one signal path (10) for upconverting a signal for transmission from an antenna and a second signal path (20) for downconverting a signal received on the antenna. A single local oscillator (12) runs at twice the duplex frequency and is used to provide the signals for the upconversion and the downconversion: the oscillator signal is used directly for upconversion, and is divided by two for downconversion. A local oscillator synthesiser (17) effects the final upconversion stage of the transmitted signal and the initial downconversion stage of the received signal. Thus, the arrangement is of simple construction and requires fewer local oscillators than prior art devices. Also, the local oscillator synthesisers for two communicating radio stations can be of exactly the same, relatively simple design.
    • 一种用于微波无线电系统的一个站的发射机/接收机电路,包括用于上变频用于从天线传输的信号的信号路径(10)和用于下变频在天线上接收的信号的第二信号路径(20)。 单个本地振荡器(12)的运行频率为双工频率的两倍,用于提供上变频和下变频信号:振荡器信号直接用于上变频,而二次用于下变频。 本地振荡器合成器(17)影响发射信号的最终上变频级和接收信号的初始下变频级。 因此,该布置结构简单,并且比现有技术的装置需要更少的本地振荡器。 另外,用于两个通信无线电台的本地振荡器合成器可以是完全相同的,相对简单的设计。