Underreamer and method of use
    1.
    发明授权
    Underreamer and method of use 失效
    客气和使用方法

    公开(公告)号:US06668949B1

    公开(公告)日:2003-12-30

    申请号:US09913626

    申请日:2001-08-17

    申请人: Allen Kent Rives

    发明人: Allen Kent Rives

    IPC分类号: E21B1032

    摘要: An underreamer (5) is formed from a tubular body (10) having a longitudinal bore therethrough, and providing an integral piston actuator (20) responsive to hydraulic pressure to move cutters (40) into engagement with the well bore and springs (60) to resist premature engagement of the cutter arms (40) and to return the cutters (40) to the body upon conclusion of the underreaming job. Skewed longitudinal grooves (45) are formed in the tubular body thereby permitting the flowpath through the underreamer to provide substantially the same inner diameter throughout the tool (5).

    摘要翻译: 从具有穿过其中的纵向孔的管状体(10)形成一个扩孔器(5),并提供响应于液压的一体式活塞致动器(20),以使切割器(40)与井眼和弹簧(60)接合, 以抵抗切割臂(40)的过早接合并且在完成了所述的加热作业之后使所述切割器(40)返回到所述主体。 倾斜的纵向槽(45)形成在管状体中,从而允许通过扩孔器的流路在整个工具(5)中提供基本上相同的内径。

    Downhole tool with extendable members
    2.
    发明授权
    Downhole tool with extendable members 有权
    井下工具具有可扩展构件

    公开(公告)号:US06615933B1

    公开(公告)日:2003-09-09

    申请号:US09856677

    申请日:2001-05-19

    IPC分类号: E21B1032

    摘要: A downhole tool (10) for mounting on a drill string comprises: a mandrel (16); a body (18) axially movably mounted on the mandrel; and radially extendable members, such as stabiliser blades or cutters (30), mounted in the body and being operatively associated with the mandrel such that relative axial movement of the mandrel and body induces radial movement of the members. Application of axial tension to the tool produces axial movement of the body relative to the mandrel, tending to retract the members from an extended configuration. The mandrel may be arranged to draw the members inwardly to permit positive retraction of the members from an extended configuration. Further, the body may define a channel (32) and the mandrel and the members include an arrangement (38, 39, 40, 42) for maintaining a desired orientation of the members relative to the body channel.

    摘要翻译: 一种用于安装在钻柱上的井下工具(10)包括:心轴(16); 轴向可移动地安装在心轴上的主体(18); 以及可径向延伸的构件,例如稳定器叶片或切割器(30),其安装在主体中并且与心轴可操作地相关联,使得心轴和主体的相对轴向运动引起构件的径向移动。 将轴向张力施加到工具产生主体相对于心轴的轴向移动,倾向于使构件从延伸构型缩回。 心轴可以被布置成向内拉动构件,以允许构件从延伸构型正向缩回。 此外,主体可以限定通道(32),并且心轴和构件包括用于维持构件相对于身体通道的期望取向的布置(38,39,40,42)。

    Expandable drill bit
    3.
    发明授权
    Expandable drill bit 有权
    可扩展钻头

    公开(公告)号:US06607046B1

    公开(公告)日:2003-08-19

    申请号:US09710379

    申请日:2000-11-10

    IPC分类号: E21B1032

    摘要: A drill bit suitable to be connected to a drill string for drilling a borehole into an earth formation, the drill string having a central longitudinal axis, the drill bit comprising a bit body connectable to the lower end of the drill string, and a cutting member provided with cutting devices at the outer surface thereof, the cutting member being rotatable relative to the bit body about a longitudinal axis of rotation extending eccentrically relative to the central longitudinal axis of the drill string, between a first rotational position[ and a second rotational position, whereby in said second rotational position the cutting devices arranged at a larger radial distance from the central longitudinal axis of the drill string than in said first rotational position.

    摘要翻译: 一种钻头,其适于连接到用于将钻孔钻入地层的钻柱,所述钻柱具有中心纵向轴线,所述钻头包括可连接到所述钻柱的下端的钻头体,以及切割构件 在其外表面设置有切割装置,所述切割构件可相对于所述钻头体围绕围绕所述钻柱的中心纵向轴线偏心延伸的纵向轴线在第一旋转位置[和第二旋转位置 从而在所述第二旋转位置中,所述切割装置布置成比所述第一旋转位置比所述钻柱的中心纵向轴线更大的径向距离。