| 发明名称 |
Method of producing side-pocket mandrels free of welds. |
| 摘要 |
<p>Method of producing side-pocket mandrels free of welds comprises a series of boring and machining steps by mechanical action and/or electro-erosion to produce a mandrel having at least one valve pocket (16) and discriminator (14).</p> |
| 申请公布号 |
EP0106525(A1) |
申请公布日期 |
1984.04.25 |
| 申请号 |
EP19830305325 |
申请日期 |
1983.09.12 |
| 申请人 |
MOORE, NORMAN |
发明人 |
MOORE, NORMAN |
| 分类号 |
B23P13/00;E21B23/03;(IPC1-7):23P13/00;21B23/03 |
主分类号 |
B23P13/00 |
| 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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