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1. 发明申请

WO2003060282A3 METHOD AND APPARATUS FOR REPLACEMENT OF UNDERGROUND PIPE 审中-公开
公开(公告)号：WO2003060282A3
公开(公告)日：2003-07-24
申请号：PCT/US2003/001043
申请日：2003-01-14
申请人： EARTH TOOL COMPANY, L.L.C.
发明人： WENTWORTH, Steven, W. , RANDA, Mark, D. , CRANE, Robert, F.
IPC分类号： F16L1/032
摘要： An impactor (11) for use with a directional boring machine (12) for replacement of underground pipes (16) includes a bursting head (23) having a rearwardly opening recess (27) and a front end opening that communicates with the recess. An inlet pipe (21) is connected at its front end to a distal end of the drill string (13) and extends into the recess of the bursting head (23) through the front end opening. A striker (31) is mounted for sliding movement along the inlet pipe (21), and a distributing mechanism responsive to pressure fluid supplied through the drill string and inlet pipe causes the striker (31) to reciprocate in the rearwardly opening recess (27) of the head to deliver forward impacts against the bursting head. The striker and distributing mechanism are mounted in a tubular housing, and a pulling connection (22) is provided by which the impactor (11) can be pulled by the drill string (13) while the striker (31) is delivering impacts against the head (23) in the same direction as a pulling force exerted by the drill string. The bursting head (23) is preferably slidably mounted on the inlet pipe (21) and moves forward relative to the inlet pipe and drill string in response to an impact of the striker against the bursting head. The impactor can be readily used with existing directional boring machines.

2. 发明申请

WO2003060282A2 METHOD AND APPARATUS FOR REPLACEMENT OF UNDERGROUND PIPE 审中-公开
标题翻译：地下管道替代方法和装置
公开(公告)号：WO2003060282A2
公开(公告)日：2003-07-24
申请号：PCT/US2003/001043
申请日：2003-01-14
申请人： EARTH TOOL COMPANY, L.L.C.
发明人： WENTWORTH, Steven, W. , RANDA, Mark, D. , CRANE, Robert, F.
IPC分类号： E21B
CPC分类号： E21B7/30 , E21B4/14 , E21B7/206 , F16L55/1658
摘要： An impactor for use with a directional boring machine for replacement of underground pipes includes a bursting head having a rearwardly opening recess and a front end opening that communicates with the recess. An inlet pipe is connected at its front end to a distal end of the drill string and extends into the recess of the bursting head through the front end opening. A striker is mounted for sliding movement along the inlet pipe, and a distributing mechanism responsive to pressure fluid supplied through the drill string and inlet pipe causes the striker to reciprocate in the rearwardly opening recess of the head to deliver forward impacts against the bursting head. The striker and distributing mechanism are mounted in a tubular housing, and a pulling connection is provided by which the impactor can be pulled by the drill string while the striker is delivering impacts against the head in the same direction as a pulling force exerted by the drill string. The bursting head is preferably slidably mounted on the inlet pipe and moves forward relative to the inlet pipe and drill string in response to an impact of the striker against the bursting head. The impactor can be readily used with existing directional boring machines.
摘要翻译：用于更换地下管道的定向钻孔机的冲击器包括具有向后开口凹部的破裂头和与凹部连通的前端开口。入口管在其前端连接到钻柱的远端，并通过前端开口延伸到破裂头的凹部中。一个撞击器被安装用于沿着入口管滑动运动，并且响应于通过钻柱和入口管供应的压力流体的分配机构使得撞针在头部的向后打开的凹部中往复运动以向前冲击冲击头。撞击器和分配机构安装在管状壳体中，并且提供牵引连接，冲击器可以由钻柱拉动，当冲击器以与钻头施加的拉力相同的方向传递冲击头部时串。爆裂头优选地可滑动地安装在入口管上，并响应于撞针对爆破头的冲击而相对于入口管和钻柱向前移动。冲击器可以方便地与现有的定向钻孔机一起使用。

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