| 发明名称 |
método para a centralização de revestimentos de perfuração. |
| 摘要 |
A centralizer for an oil well drill casing including at least one strip of ceramic or plastic material applied onto an outer wall of the casing. |
| 申请公布号 |
BR0115950(B1) |
申请公布日期 |
2012.02.22 |
| 申请号 |
BR20010115950 |
申请日期 |
2001.11.15 |
| 申请人 |
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发明人 |
ANGELO CALDERONI;FABRIZIO ZAUSA |
| 分类号 |
E21B17/10 |
主分类号 |
E21B17/10 |
| 代理机构 |
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代理人 |
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