Dual channel downhole telemetry
    3.
    发明授权
    Dual channel downhole telemetry 有权
    双通道井下遥测

    公开(公告)号:US06909667B2

    公开(公告)日:2005-06-21

    申请号:US10075529

    申请日:2002-02-13

    摘要: The present disclosure provides several methods for selecting and transmitting information from downhole using more than one channel of communication wherein data streams transmitted up each communications channel are each independently interpretable without reference to data provided up the other of the communications channels. Preferred embodiments incorporate the use of a combination of at least two of mud-based telemetry, tubular-based telemetry, and electromagnetic telemetry to achieve improved results and take advantage of opportunities presented by the differences between the different channels of communication.

    摘要翻译: 本公开提供了用于使用多于一个通信信道从井下选择和发送信息的几种方法,其中在每个通信信道上发送的数据流都可以独立地解释,而不参考另一个通信信道提供的数据。 优选实施例结合使用基于泥浆的遥测,基于管的遥测和电磁遥测中的至少两种的组合来实现改进的结果并且利用由不同通信通道之间的差异呈现的机会。

    Drill string incorporating an acoustic telemetry system employing one or more low frequency acoustic attenuators and an associated method of transmitting data
    4.
    发明授权
    Drill string incorporating an acoustic telemetry system employing one or more low frequency acoustic attenuators and an associated method of transmitting data 有权
    包括采用一个或多个低频声衰减器的声学遥测系统的钻柱以及发送数据的相关方法

    公开(公告)号:US07068183B2

    公开(公告)日:2006-06-27

    申请号:US10882730

    申请日:2004-06-30

    IPC分类号: G01V3/00

    CPC分类号: E21B47/16 G01V11/002

    摘要: A drill pipe forms an acoustic transmission channel for data to be transmitted from a downhole transceiver to a surface transceiver. By positioning a first low frequency acoustic attenuator between a drill bit and the downhole transceiver, acoustic noise generated by the drill bit is attenuated. Similarly, by positioning the surface transceiver between the top of the drill pipe and a second low frequency acoustic attenuator, acoustic noise generated by surface equipment is attenuated. In this manner, the first and second low frequency acoustic attenuators serve as terminators for the acoustic transmission channel. Finally, by combining a third low frequency acoustic attenuator positioned between first and second sections of the drill pipe with first and second acoustic transceivers acoustically isolated from one another by the third low frequency acoustic attenuator and non-acoustically coupled to one another for bi-directional exchanges of signals, an acoustic repeater is provided for the transmission channel.

    摘要翻译: 钻杆形成用于从井下收发器传输到地面收发器的数据的声传输通道。 通过将钻头和井下收发器之间的第一低频声衰减器定位,钻头产生的声学噪声被衰减。 类似地,通过将​​表面收发器定位在钻杆的顶部和第二低频声衰减器之间,由表面设备产生的声学噪声被衰减。 以这种方式,第一和第二低频声衰减器用作声传输通道的终端。 最后,通过将位于钻杆的第一和第二部分之间的第三低频声衰减器组合成由第三低频声衰减器彼此声隔离的第一和第二声收发器,并且非声学地耦合到双向 为传输信道提供信号交换,声中继器。

    Method and apparatus for treating a wellbore with vibratory waves to remove particles therefrom
    5.
    发明授权
    Method and apparatus for treating a wellbore with vibratory waves to remove particles therefrom 有权
    用振动波处理井眼以从其中除去颗粒的方法和装置

    公开(公告)号:US06619394B2

    公开(公告)日:2003-09-16

    申请号:US09731873

    申请日:2000-12-07

    IPC分类号: E21B2800

    CPC分类号: G01V1/44 E21B28/00 E21B43/003

    摘要: A process and apparatus for treating a wellbore, comprising subjecting a substantially same portion of the wellbore to vibratory waves produced by a plurality of vibratory wave generators. The vibratory waves may have about the same frequency or a plurality of frequencies, and the frequencies may partially overlap, not overlap, or be modulated across a range. Additionally, the frequencies may be modulated in an oval, hoop, and flexural modes. The vibratory waves may be produced by firing the vibratory wave generators simultaneously or in sequence. Combinations of a vibrating pipe, piston pulser, or valve may be used as vibratory wave generators. In a preferred embodiment, the thickness and change of thickness of a mudcake on the interior surface of a wellbore are measured to evaluate the effectiveness of the wellbore treatment.

    摘要翻译: 一种用于处理井眼的方法和装置,包括使井筒的基本相同的部分经受由多个振动波发生器产生的振动波。 振动波可以具有大约相同的频率或多个频率,并且频率可以部分地重叠,而不是重叠,或者在一个范围上被调制。 另外,频率可以以椭圆形,环形和弯曲模式进行调制。 振动波可以通过同时或依次点火振动波发生器来产生。 振动管,活塞式脉冲发生器或阀门的组合可用作振动波发生器。 在优选的实施方案中,测量在井筒内表面上的泥饼的厚度和厚度变化,以评估井眼处理的有效性。

    Apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing
    6.
    发明授权
    Apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing 失效
    从井眼套管中去除易碎的破裂盘或其他脆弱装置的装置和方法

    公开(公告)号:US06397950B1

    公开(公告)日:2002-06-04

    申请号:US09628535

    申请日:2000-07-31

    IPC分类号: E21B2902

    CPC分类号: E21B17/00 E21B29/02 E21B43/11

    摘要: An apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing. The casing has a special casing section defining a plurality of holes therethrough. Rupturable glass ceramic discs or inserts are disposed in the holes and retained therein. The glass ceramic discs or inserts are adapted to withstand fluid differential pressure normally present in the wellbore but are rupturable in response to impingement by a pressure wave thereon. The pressure wave is provided by a pressure wave generating device positionable in the casing string adjacent to the holes in the special casing section. The pressure generative device may generate a pressure pulse or an acoustical wave. Methods of perforating a well casing using a pressure pulse or an acoustical wave are also disclosed.

    摘要翻译: 一种用于从井筒壳体中去除易断裂的破裂盘或其它脆弱装置的装置和方法。 壳体具有限定穿过其中的多个孔的特殊壳体部分。 可破裂的玻璃陶瓷盘或插入件设置在孔中并保持在其中。 玻璃陶瓷盘或插入件适于承受通常存在于井眼中的流体压差,但是响应于其上的压力波的冲击而可破裂。 压力波由位于与特殊套管部分中的孔相邻的套管柱中的压力波产生装置提供。 压力产生装置可产生压力脉冲或声波。 还公开了使用压力脉冲或声波对穿孔套管穿孔的方法。

    Directional signal and noise sensors for borehole electromagnetic telemetry system
    8.
    发明授权
    Directional signal and noise sensors for borehole electromagnetic telemetry system 有权
    井眼电磁遥测系统的定向信号和噪声传感器

    公开(公告)号:US07268696B2

    公开(公告)日:2007-09-11

    申请号:US10673971

    申请日:2003-09-29

    IPC分类号: G01V11/00

    摘要: An electromagnetic borehole telemetry system providing improved signal to noise ratio. Adaptive filters use noise channels as references to remove noise from the signal channel. Directional detectors provide a signal channel with reduced noise content and improved noise channels with reduced signal content. Directional detectors may be magnetometers aligned with the magnetic field, or antennas aligned with the electric field, of signal or noise sources. Alignment may be performed by beam steering of the outputs of a three-channel detector, which may detect both signal and noise.

    摘要翻译: 提供改善的信噪比的电磁井眼遥测系统。 自适应滤波器使用噪声通道作为参考,以消除信号通道中的噪声。 定向检测器提供具有降低的噪声含量的信号信道和具有降低的信号含量的改进的噪声信道。 定向检测器可以是与磁场对准的磁力计,或与电场对准的天线,信号或噪声源。 可以通过可以检测信号和噪声的三通道检测器的输出的波束控制来执行对准。

    Motion sensor for noise cancellation in borehole electromagnetic telemetry system
    9.
    发明授权
    Motion sensor for noise cancellation in borehole electromagnetic telemetry system 有权
    用于井眼电磁遥测系统噪声消除的运动传感器

    公开(公告)号:US06781520B1

    公开(公告)日:2004-08-24

    申请号:US09923184

    申请日:2001-08-06

    IPC分类号: G01V300

    摘要: An electromagnetic borehole telemetry system providing improved signal to noise ratio. Adaptive filters use noise channels as references to remove noise from the signal channel. Improved sensors provide noise channels with reduced signal content. Motion sensors are used to detect noise and provide a noise channel free of signal content. The motion sensors are shielded from electromagnetic signals to prevent detection of the telemetry signal.

    摘要翻译: 提供改善的信噪比的电磁井眼遥测系统。 自适应滤波器使用噪声通道作为参考,以消除信号通道中的噪声。 改进的传感器为噪声信道提供了减少的信号含量。 运动传感器用于检测噪声并提供无信号内容的噪声通道。 运动传感器屏蔽电磁信号,以防止遥测信号的检测。