Erosion resistant downhole mud diverter tool
    3.
    发明授权
    Erosion resistant downhole mud diverter tool 失效
    防侵蚀井下泥浆分流器工具

    公开(公告)号:US5911285A

    公开(公告)日:1999-06-15

    申请号:US776550

    申请日:1997-01-31

    IPC分类号: E21B21/00 E21B21/10 F16K15/06

    摘要: An erosion resistant downhole diverter tool (210) comprises a generally cylindrical body (212) which may be configured as a slick sub or may include stabilizing blades (260). Located within the body 212 are a plurality of erosion-resistant, removable, cylindrical inserts (220). Each insert has an aperture (222) formed therein, aligned with a corresponding aperture (218) formed in the cylindrical body (212). Located within the apertures (218) in the cylindrical body (212) are pressure responsive, normally-closed valve assemblies (300), incorporating jet nozzles, which open in response to increased fluid pressure within the tool to provide fluid jets directed into the annulus surrounding the tool in a borehole or the like. The upper ends of the stabilizer blades (260) may include cutting structures to provide a back-reaming function. In alternative embodiments, the valve assemblies are omitted and replaced by simple jet nozzles, and the interior of the inserts is configured to promote fluid flow through the nozzles without increased fluid pressure. The inserts and nozzle components in contact with fluid are formed from erosion-resistant material. The tool allows fluid diversion functions to be performed without interrupting drilling operations.

    摘要翻译: PCT No.PCT / GB95 / 01817 Sec。 371日期1997年1月31日 102(e)日期1997年1月31日PCT提交1995年8月1日PCT公布。 公开号WO96 / 04458 日期1996年2月15日防侵蚀井下换向器工具(210)包括大致圆柱形的主体(212),其可以被配置为光滑的子部件或可包括稳定刀片(260)。 位于主体212内的是多个耐腐蚀,可移除的圆柱形插入件(220)。 每个插入件具有形成在其中的孔(222),其与形成在圆柱体(212)中的对应孔(218)对齐。 位于圆柱形主体(212)中的孔(218)内的是压力响应的常闭阀组件(300),其包括喷射喷嘴,其响应于工具内的增加的流体压力而打开以提供引导到环形空间中的流体射流 围绕钻孔等中的工具。 稳定器叶片(260)的上端可以包括切割结构以提供回扩孔功能。 在替代实施例中,阀组件被省略并由简单的喷嘴代替,并且插入件的内部构造成促进流体流过喷嘴而不增加流体压力。 与流体接触的刀片和喷嘴部件由耐腐蚀材料形成。 该工具允许在不中断钻孔操作的情况下执行流体分流功能。