发明名称 |
DTH-HAMMER DRILLING DEVICE AND OVERBURDEN DRILLING METHOD |
摘要 |
<p>The device has a down-the-hole hammer with a percussion drill bit. A drill pipe (2) is arranged with a channel for cuttings. A supply channel is provided for a flushing medium and a flushing medium supply device. A seal (18) is arranged for sealing a borehole against a borehole opening. The seal is provided at a fixed distance from a drill head (6). An overlapping pipe is connected to the percussion drill bit. An independent claim is also included for a method for drilling.</p> |
申请公布号 |
EP1907663(B1) |
申请公布日期 |
2013.02.20 |
申请号 |
EP20060743121 |
申请日期 |
2006.06.07 |
申请人 |
GEOMECHANIK WASSER- UND UMWELTTECHNIK GMBH |
发明人 |
FLEISCHMANN, FRANK;ABT, JOHANNES |
分类号 |
E21B21/12;E21B7/20;E21B33/126 |
主分类号 |
E21B21/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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