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    • 1. 发明申请
    • SPEAR HEAD ASSEMBLY
    • SPEAR HEAD大会
    • WO1997018382A1
    • 1997-05-22
    • PCT/AU1996000589
    • 1996-09-18
    • DOWN HOLE TECHNOLOGIES PTY. LTD.MCLEOD, Gavin, ThomasSAYER, Chris
    • DOWN HOLE TECHNOLOGIES PTY. LTD.
    • E21B23/14
    • E21B23/00E21B21/00
    • A spear head assembly (10) comprises a main body portion (14) with axially opposite first and second ends (16 and 18) respectively. The first end (16) is adapted for threaded connection with a down hole tool (12). The tool which does not form part of the invention is provided with an internal fluid flow path (13). Passage (20) is formed in the main body portion (14) and extends between first and second spaced apart openings O1 and O2 which are coincident with the first end and the second end (16 and 18) respectively of the main body portion (14). Spear point (22) is coupled to the main body portion (14) at, and extends from, the second end (18). In use, when the spear head assembly (10) is coupled to tool (12), to facilitate connection of the tool to a wireline and overshot via the spear point (22), the passage (20) is in fluid communication with the path (13). Therefore, fluid such as drilling mud can glow through the path (13) in a substantially unimpeded manner.
    • 矛头组件(10)包括分别具有轴向相对的第一和第二端(16和18)的主体部分(14)。 第一端(16)适于与井下工具(12)的螺纹连接。 不构成本发明一部分的工具设置有内部流体流动路径(13)。 通道(20)形成在主体部分(14)中并且在分别与主体部分(14)的第一端和第二端(16和18)重合的第一和第二间隔开口O1和O2之间延伸 )。 矛点(22)在第二端(18)处连接到主体部分(14)并且从第二端部(18)延伸。 在使用中,当矛头组件(10)联接到工具(12)时,为了便于工具连接到电缆并通过矛点(22)过紧,通道(20)与路径流体连通 (13)。 因此,诸如钻井泥浆的流体可以以基本上无阻碍的方式通过路径(13)发光。