发明名称 |
DIRECTIONAL DRILLING ROD |
摘要 |
A dirigible drilling head is provided with a hydraulic pulser in its rotating inner tube in the form of a spindle piston which can obstruct the flushing medium passage and is displaced by a hydraulic circuit including a hydraulic valve. The hydraulic valve is in turn actuated by a miniature electronic circuit so that a variety of input parameters from respective sensors can be delivered to the circuit and transformed into respective hydraulic pulses which are monitored by a differential pressure pickup connected to the line feeding the flushing liquid to the string. |
申请公布号 |
AU3085584(A) |
申请公布日期 |
1985.01.24 |
申请号 |
AU19840030855 |
申请日期 |
1984.07.19 |
申请人 |
BERGWERKSVERBAND GMBH;SCHWING HYDRAULIK ELEKTRONIK |
发明人 |
HEINZ WALLUSSEK;MARTIN WIEBE |
分类号 |
E21B47/20;E21B7/04;E21B7/06;E21B17/18;E21B44/00;E21B47/02;E21B47/022;E21B47/18 |
主分类号 |
E21B47/20 |
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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