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1.发明公开
公开(公告)号：EP2065553A1
公开(公告)日：2009-06-03
申请号：EP07122050.3
申请日：2007-11-30
申请人： Services Pétroliers Schlumberger , Schlumberger Holdings Limited , Schlumberger Technology B.V. , PRAD Research and Development N.V.
CPC分类号： E21B41/0035 , E21B4/02 , E21B7/046 , E21B23/01 , E21B41/0042 , E21B43/10 , E21B44/00
摘要： A drilling system for drilling a lateral borehole from a mail borehole comprises a tubular conduit through which a fluid can be pumped; and a drilling assembly connected to the tubular conduit so as to receive fluid pumped therethrough, the drilling assembly comprising: a power conversion unit, through which the fluid flows and which operates to provide a downhole power output; a drilling unit including a drilling apparatus powered by the output of the power conversion unit and operable to drill a lateral borehole into the formation surrounding the main borehole, and a liner unit for storing one or more liners for installation into the lateral borehole; and an anchor unit operable to anchor the drilling assembly in the main borehole when the drilling unit operates to drill the lateral borehole. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the drilling assembly in the main borehole at a location of interest using the tubular conveyance; anchoring the drilling assembly in the main borehole using the anchor unit; operating the drilling unit to drill a lateral borehole from the main borehole; retrieving the drilling unit from the lateral borehole; releasing the anchor unit; and moving the drilling assembly to another location.
摘要翻译： 用于从邮件钻孔钻出横向钻孔的钻井系统包括管状导管，流体可通过该管道泵送; 以及钻井组件，其连接到所述管状管道，以便接收通过其泵送的流体，所述钻井组件包括：功率转换单元，所述流体流过所述功率转换单元，并且其操作以提供井下功率输出; 钻井单元，其包括由功率转换单元的输出供电的钻孔设备，并且可操作以将横向钻孔钻入围绕主钻孔的地层中;以及衬套单元，用于存储用于安装到侧向钻孔中的一个或多个衬垫; 以及锚固单元，其可操作以在钻井单元操作以钻入横向钻孔时将钻井组件锚定在主钻孔中。 使用这种钻井系统从主钻孔钻出侧向钻孔的方法包括使用管状输送将钻探组件定位在感兴趣的位置处的主钻孔中; 使用锚固单元将钻井组件锚定在主钻孔中; 操作钻井单元从主钻孔钻出横向钻孔; 从侧向钻孔取回钻井单元; 释放锚单元; 并将钻探组件移动到另一位置。
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