| 发明名称 |
METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE |
| 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 |
US2014034295(A1) |
申请公布日期 |
2014.02.06 |
| 申请号 |
US201314041685 |
申请日期 |
2013.09.30 |
| 申请人 |
ENI S.P.A. |
发明人 |
CALDERONI ANGELO;ZAUSA FABRIZIO |
| 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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| 主权项 |
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