| 发明名称 |
DISPOZITIV DE RABATARE A UNUI MAST |
| 摘要 |
The lowerer comprises a component of a portable system for borehole repair work. Thus, a hydraulic hoist is hinged to a stationary bottom beam in a chassis, and to a moving lower top beam. The various supports fixed to the mast, supplement a safety valve.
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| 申请公布号 |
RO96905(A2) |
申请公布日期 |
1989.05.30 |
| 申请号 |
RO19860125337 |
申请日期 |
1986.11.28 |
| 申请人 |
INTREPRINDEREA DE UTILAJ PETROLIER,RO |
发明人 |
COSTACHE TANASE,RO |
| 分类号 |
E21B7/02;(IPC1-7):E21B7/02 |
主分类号 |
E21B7/02 |
| 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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