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    System for cutting materials in wellbores
    9.
    发明授权
    System for cutting materials in wellbores 失效
    井筒切割材料系统

    公开(公告)号：US6155343A

    公开(公告)日：2000-12-05

    申请号：US848961

    申请日：1997-05-02

    申请人： Gregory R. Nazzal ,  Gerald D. Lynde

    发明人： Gregory R. Nazzal ,  Gerald D. Lynde

    IPC分类号： E21B29/00 ,  E21B29/06 ,  E21B43/114

    CPC分类号： E21B43/114 ,  E21B29/00 ,  E21B29/06

    摘要： The present invention provides a downhole cutting tool for cutting materials at a worksite in a wellbore. The cutting tool includes a cutting end that is adapted to discharge a high pressure fluid therefrom. A power unit in the tool includes a plurality of serially arranged pressure stages, wherein each such stage increases the fluid pressure above its preceding stage until the desired high pressure has been obtained. The high pressure fluid is discharged through the cutting end to effect cutting of a material. A pulsar in the tool is provided to pulse the fluid before it is discharged through the nozzle, which enables the use of lower pressure compared to the pressure required without pulsation of the fluid. A control unit controls the position and orientation of the cutting end relative to the material and may be programmed to cut the material according a predetermined pattern provided to the control unit. An imaging device may be included in the downhole cutting tool to obtain images of the worksite prior to and after the cutting operations.

    摘要翻译： 本发明提供了一种用于在井筒中的工地切割材料的井下切削工具。 切割工具包括适于从其排出高压流体的切割端。 工具中的动力单元包括多个串联布置的压力级，其中每个这样的级将流体压力提高到高于其前级，直到获得所需的高压。 高压流体通过切割端排出以切割材料。 提供工具中的脉冲发生器以在流体通过喷嘴排出之前脉冲，这使得与所需压力相比，能够使用更低的压力而不会使流体搏动。 控制单元控制切割端相对于材料的位置和取向，并且可以被编程为根据提供给控制单元的预定图案切割材料。 成像装置可以包括在井下切割工具中，以在切割操作之前和之后获得工地的图像。