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11 条记录 (耗时 0.013 秒)

    DRILLING AND OPERATING SIGMOID-SHAPED WELLS
    8.
    发明公开
    DRILLING AND OPERATING SIGMOID-SHAPED WELLS 审中-公开

    公开(公告)号：EP3580423A1

    公开(公告)日：2019-12-18

    申请号：EP18707494.3

    申请日：2018-02-12

    申请人： Saudi Arabian Oil Company

    发明人： NOUI-MEHIDI, Mohamed, N.

    IPC分类号： E21B7/04

    摘要： Provided are systems and methods for drilling a horizontally-oriented well having a sigmoid-shaped wellbore including an upper sigmoid portion having a downward curving wellbore trajectory and a lower sigmoid portion having an upward curving wellbore trajectory. The upper sigmoid portion having a first trajectory having a generally horizontal gradient at an entry point of the wellbore and that increases in downward gradient to a vertical gradient at an inflection point. The lower sigmoid portion having a second trajectory that includes the vertical gradient at the inflection point and that decreases in downward gradient to a generally horizontal gradient at a horizontal transition point of the wellbore.

    METHOD AND APPARATUS FOR IN-WELL WIRELESS CONTROL USING INFRASOUND SOURCES
    10.
    发明公开
    METHOD AND APPARATUS FOR IN-WELL WIRELESS CONTROL USING INFRASOUND SOURCES 审中-公开
    VERFAHREN UND VORRICHTUNG ZUR BOHRLOCHINTERNEN DRAHTLOSEN STEUERUNG MITTELS INFRASCHALLQUELLEN

    公开(公告)号：EP2946066A2

    公开(公告)日：2015-11-25

    申请号：EP14703211.4

    申请日：2014-01-16

    申请人： Saudi Arabian Oil Company

    发明人： NOUI-MEHIDI, Mohamed, N. ,  BLACK, Michael, J.

    IPC分类号： E21B34/06 ,  E21B47/04 ,  E21B47/18

    CPC分类号： E21B47/04 ,  E21B34/066 ,  E21B47/18

    摘要： A method for measuring the depth of a wellbore having a motherbore and a lateral bore, using an infrasound wave generator (26). The infrasound waves (30) have a low frequency and a wavelength that is much larger than the transverse dimensions of the well (10). When the infrasound waves (30) are directed down the well (10), the well (10) will act as a wave guide for low frequency excitations. The infrasound waves (30) can be used to probe well (10) geometry. The resonance of the infrasound waves (30) can be observed to indicate that the waves have reached the bottom the well (10), and the depth of the motherbore and the lateral bore can be calculated based on the number of wavelengths of infrasound waves (30) that have entered the well (10) when the resonance is observed.

    摘要翻译： 一种使用次声波发生器和接收器进行井下数据通信的系统和方法。 次声波具有比井的横向尺寸大得多的低频和波长。 当次声波指向井下时，井将作为低频激励的波导。 接收器可操作地连接到流入阀和其他井下设备，并且接收次声波。 如果波浪是预定的频率，则接收机命令阀打开或关闭，或以其他方式控制井下设备。 次声波也可用于探测井几何形状并识别井内的流体性质。