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    DETERMINATION OF DOWNHOLE PRESSURE WHILE PUMPING
    6.
    发明申请
    DETERMINATION OF DOWNHOLE PRESSURE WHILE PUMPING 有权
    井下压力的确定

    公开(公告)号：US20080236935A1

    公开(公告)日：2008-10-02

    申请号：US11691117

    申请日：2007-03-26

    申请人： Richard Timothy Coates ,  Douglas E. Miller ,  Philip Sullivan ,  Francois Auzerais ,  Tarek M. Habashy

    发明人： Richard Timothy Coates ,  Douglas E. Miller ,  Philip Sullivan ,  Francois Auzerais ,  Tarek M. Habashy

    IPC分类号： G01V1/40 ,  G08B3/02

    CPC分类号： E21B47/04 ,  E21B47/06 ,  E21B47/18

    摘要： Tubewaves are used to transmit an indication of the depth at which a condition is detected in a well. In particular, the depth is calculated based on the difference in arrival time at the surface of a first tubewave which propagates directly upward in the borehole and a second tubewave which initially travels downward and is then reflected upward. The tubewaves may be generated by a canister designed to implode at a certain pressure. After being introduced into the flowline at an above ground inlet, the canister is carried downhole by gravity and the fluid being pumped. When the canister reaches a depth at which its pressure tolerance is exceeded, it implodes and generates the tubewaves. An analyzer at the surface detects the tubewaves with a hydrophone array and generates a pressure versus depth profile of the well, i.e., one data point for each implosion. Canisters may be acoustically tagged by controlling volume and orifice size in order to generate tubewaves having particular frequency and amplitude characteristics. Canisters may also be configured to produce multiple implosions, e.g., one implosion at each of a selection of different pressures. Canisters may also be equipped with triggering and arming mechanisms, and may generate tubewaves in response to conditions other than a particular pressure.

    摘要翻译： 涡卷用于传输在井中检测到条件的深度的指示。 特别地，深度是基于在井眼中直接向上传播的第一管风管的表面到达时间的差异以及最初向下行进并然后被向上反射的第二管道涡流来计算的。 管道可以由设计成在一定压力下膨胀的罐产生。 在引入到地面入口的流线之后，通过重力将罐承载在井下，并且泵送流体。 当罐达到超过其压力公差的深度时，它会破坏并产生管道。 表面上的分析仪用水听器阵列检测波音管，并产生井的压力与深度分布，即每个内爆的一个数据点。 为了产生具有特定的频率和振幅特性的波管，可以通过控制体积和孔口尺寸来将气囊进行声学标记。 罐也可以被配置为产生多个内爆，例如在不同压力的选择中的每一个处产生一个内爆。 罐也可以配备触发和布防机构，并且可以响应于特定压力以外的条件而产生管道。