Drill string component
    1.
    发明授权
    Drill string component 失效
    钻柱组件

    公开(公告)号:US5261498A

    公开(公告)日:1993-11-16

    申请号:US784392

    申请日:1991-12-30

    IPC分类号: E21B7/04 E21B17/10

    CPC分类号: E21B17/1064

    摘要: A drill string component for preventing chafing of a drill casing as a result of contact between the drill casing and a rotating drill string comprises a central mandrel (2) having rotatably mounted thereon a sleeve (11). The sleeve (11) is retained between shoulders defined on the mandrel to prevent accidental loss of the sleeve in the event of excessive wear in the supporting bearings. Axial thrust loads are transferred from the outer sleeve (11) to the mandrel by way of thrust bearings supported on the mandrel shoulders. Seals (24A, 24B) located between the outer sleeve seal bodies (23) and an inner sleeve (9) prevent the ingress of contaminants to the zone of bushings (12, 13) which rotatably support the outer sleeve.

    摘要翻译: PCT No.PCT / GB90 / 01006 Sec。 371日期1991年12月30日 102(e)日期1991年12月30日PCT Filed 1990年6月29日PCT Pub。 出版物WO91 / 00411 日本1991年1月10日。一种用于防止由钻孔套筒和旋转钻柱之间的接触而导致钻壳磨损的钻柱组件包括其上可旋转地安装有套筒(11)的中心心轴(2)。 套筒(11)保持在心轴上限定的肩部之间,以防止在支撑轴承过度磨损的情况下意外损失套筒。 轴向推力载荷通过支撑在心轴肩上的推力轴承从外套筒(11)传递到心轴。 位于外套筒密封体(23)和内套筒(9)之间的密封件(24A,24B)防止污染物进入可旋转地支撑外套筒的衬套区域(12,13)。

    Drilling tool
    2.
    发明授权
    Drilling tool 失效
    钻孔工具

    公开(公告)号:US5020599A

    公开(公告)日:1991-06-04

    申请号:US488090

    申请日:1990-06-22

    申请人: Werner Lau

    发明人: Werner Lau

    IPC分类号: E21B4/18 E21B17/02 E21B31/00

    CPC分类号: E21B4/18 E21B17/021 E21B31/00

    摘要: A tool for use in an oil or gas well to retrieve a drilling or production string from the well, said tool comprising an assembly which can be mounted on a supporting string, a driven member carried by the assembly and responsive to vertical movement of the assembly, to be driven in a predetermined rotational direction, said driven member being provided with or supporting a self-tapping thread provided at the lowermost end of the assembly, the self-tapping thread having the same sense as said predetermined direction of rotation.

    Drill string anchor
    3.
    发明授权
    Drill string anchor 失效
    钻柱锚

    公开(公告)号:US5531280A

    公开(公告)日:1996-07-02

    申请号:US397151

    申请日:1995-06-14

    IPC分类号: E21B4/18 E21B23/04

    CPC分类号: E21B23/04 E21B4/18

    摘要: A drill string anchor for use in a well bore, the anchor having a body, a through bore and a plurality of anchor assemblies, each assembly comprising an anchor member, a piston supported within a body and a biasing means. The piston is initially radially movable in response to an initiating fluid pressure in the through bore causing its movement from a first retracted position to a second extended position in which the piston drives the anchor member into contact with the wall of the well bore. The biasing means acts to provide a force biasing the piston towards the first retracted position.

    摘要翻译: PCT No.PCT / GB93 / 01837 Sec。 371 1995年6月14日第 102(e)1995年6月14日PCT PCT 1993年8月31日PCT公布。 公开号WO94 / 05891 日期:1994年3月17日。一种用于井眼的钻柱锚固件,锚固体具有主体,通孔和多个锚固组件,每个组件包括锚固构件,支撑在主体内的活塞和偏压 手段。 活塞最初可以响应于通孔中的起始流体压力而可径向移动,从而使其从第一缩回位置运动到第二延伸位置,在该第二延伸位置中,活塞驱动锚定构件与井眼的壁接触。 偏置装置用于提供朝向第一缩回位置偏置活塞的力。