发明公开
- 专利标题: Control method and control device for a down-the-hole rock drill
- 专利标题(中): 控制和控制装置用于在潜孔锤钻。
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申请号: EP85850230.5申请日: 1985-07-04
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公开(公告)号: EP0168368A1公开(公告)日: 1986-01-15
- 发明人: Lindberg, Eric Thomas
- 申请人: Atlas Copco Aktiebolag
- 申请人地址: Nacka S-105 23 Stockholm SE
- 专利权人: Atlas Copco Aktiebolag
- 当前专利权人: Atlas Copco Aktiebolag
- 当前专利权人地址: Nacka S-105 23 Stockholm SE
- 代理机构: Grundfelt, Erik Gunnar
- 优先权: SE8403686 19840712
- 主分类号: E21B4/14
- IPC分类号: E21B4/14 ; E21B21/08 ; E21B34/08
摘要:
When drilling deep boreholes with a down-the-hole drill (15), the pressure and the flow of the motive fluid are controlled so that the impact velocity of the piston hammer of the drill is kept within narrow limits independently of the counter pressure in the borehole. For this purpose the quotient of pressure and flow can be held substantially constant.
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