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    • 4. 发明申请
    • Downhole clock
    • 井下时钟
    • US20050012561A1
    • 2005-01-20
    • US10622557
    • 2003-07-18
    • David YoungCarl RobbinsEugene Linyaev
    • David YoungCarl RobbinsEugene Linyaev
    • H03L1/02H03L1/04H03L1/00
    • H03L1/04H03L1/022
    • A downhole crystal-based clock that is substantially insensitive to the factors that may cause frequency deviation as a result of downhole temperature. The clock may include a plurality of crystals, where a first crystal may be more stable, with respect to temperature, than a second crystal. The crystals may be thermally coupled together so that they may have substantially the same temperature. An error detector may monitor the differences between the frequencies associated with each crystal and provide this information to a storage device. This information may be determined prior to deploying the clock downhole. When deployed downhole, the signal from the error detector may be interpreted in light of the information in the storage device to provide a temperature measurement of the two crystals. The downhole temperature measurement then may be used to reduce frequency deviations in the downhole clock that may result from downhole temperatures.
    • 基于井下晶体的时钟,对由于井下温度可能引起频率偏差的因素基本上不敏感。 时钟可以包括多个晶体,其中第一晶体相对于温度可以比第二晶体更稳定。 晶体可以热耦合在一起,使得它们可以具有基本上相同的温度。 误差检测器可以监视与每个晶体相关联的频率之间的差异,并将该信息提供给存储设备。 该信息可以在井下部署时钟之前确定。 当部署在井下时,来自误差检测器的信号可以根据存储装置中的信息来解释,以提供两个晶体的温度测量。 然后可以使用井下温度测量来减少可能由井下温度引起的井下时钟的频率偏差。
    • 5. 发明申请
    • WIRELESS TELEMETRY REPEATER SYSTEMS AND METHODS
    • 无线电视重复系统和方法
    • US20100182161A1
    • 2010-07-22
    • US12090105
    • 2007-04-28
    • Carl A. RobbinsEugene LinyaevLi Gao
    • Carl A. RobbinsEugene LinyaevLi Gao
    • G01V3/00
    • G01V11/002E21B47/122E21B47/14
    • Various electromagnetic LWD telemetry systems are disclosed having a wireless repeater positioned on or near the seabed. The wireless repeater receives and demodulates electromagnetic uplink signals and retransmits the uplink signals from the seabed as electromagnetic or acoustic signals. A receiver on the drilling platform or suspended from the water's surface receives the uplink signal and forwards it to a facility for processing and storage. In some embodiments, the wireless repeater takes the form of a sub threaded inline with the drill string with an electromagnetic signal sensor positioned inside the drill string. In other embodiments, the wireless repeater takes the form of a unit that rests on the seabed with electromagnetic signal sensors inserted into the sea bottom.
    • 公开了各种电磁LWD遥测系统,其具有位于海床上或附近的无线中继器。 无线中继器接收和解调电磁上行信号,并将来自海底的上行链路信号作为电磁信号或声信号进行重传。 钻井平台上的接收器或从水面悬吊的接收器接收上行链路信号并将其转发到设备进行处理和存储。 在一些实施例中,无线中继器采用位于钻柱内部的电磁信号传感器与钻柱一起进行子螺纹内联的形式。 在其他实施例中,无线中继器采用放置在海床上的单元的形式,其中电磁信号传感器插入海底。
    • 7. 发明授权
    • Downhole clock having temperature compensation
    • 井下时钟具有温度补偿功能
    • US07212075B2
    • 2007-05-01
    • US10622557
    • 2003-07-18
    • David J. YoungCarl A. RobbinsEugene Linyaev
    • David J. YoungCarl A. RobbinsEugene Linyaev
    • H03B5/32
    • H03L1/04H03L1/022
    • A downhole crystal-based clock that is substantially insensitive to the factors that may cause frequency deviation as a result of downhole temperature. The clock may include a plurality of crystals, where a first crystal may be more stable, with respect to temperature, than a second crystal. The crystals may be thermally coupled together so that they may have substantially the same temperature. An error detector may monitor the differences between the frequencies associated with each crystal and provide this information to a storage device. This information may be determined prior to deploying the clock downhole. When deployed downhole, the signal from the error detector may be interpreted in light of the information in the storage device to provide a temperature measurement of the two crystals. The downhole temperature measurement then may be used to reduce frequency deviations in the downhole clock that may result from downhole temperatures.
    • 基于井下晶体的时钟,对由于井下温度可能引起频率偏差的因素基本上不敏感。 时钟可以包括多个晶体,其中第一晶体相对于温度可以比第二晶体更稳定。 晶体可以热耦合在一起,使得它们可以具有基本上相同的温度。 误差检测器可以监视与每个晶体相关联的频率之间的差异,并将该信息提供给存储设备。 该信息可以在井下部署时钟之前确定。 当部署在井下时,来自误差检测器的信号可以根据存储装置中的信息来解释,以提供两个晶体的温度测量。 然后可以使用井下温度测量来减少可能由井下温度引起的井下时钟的频率偏差。