发明名称 |
Dynamic seal tube for a down hole hammer drill |
摘要 |
The present invention is directed to a dynamic seal tube for use in pressurized fluid-driven down hole hammer drills. The dynamic seal tube is a tube that slides within the bore of the piston and the anvil portion of the drill bit and co-operatively acts to release different volumes of pressurized fluid from the lower chamber when the piston is in different predetermined positions. |
申请公布号 |
AU2014289968(A1) |
申请公布日期 |
2016.03.03 |
申请号 |
AU20140289968 |
申请日期 |
2014.07.10 |
申请人 |
DRILLROC PNEUMATIC PTY LTD |
发明人 |
LORGER, TONY |
分类号 |
E21B4/14;E21B1/26;E21B21/10 |
主分类号 |
E21B4/14 |
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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