| 发明名称 |
Treating, including induction heating of well pipe connections |
| 摘要 |
Treatment of a steel well pipe connection involves use of an electrical coil and a cylindrical sleeve carrying the coil, and includes the steps:
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| 申请公布号 |
US4133095(A) |
申请公布日期 |
1979.01.09 |
| 申请号 |
US19770839830 |
申请日期 |
1977.10.06 |
| 申请人 |
HYDRIL COMPANY |
发明人 |
LEWIS, GEORGE E.;BOLLFRASS, CHARLES A. |
| 分类号 |
F16L15/04;E21B17/00;E21B17/04;E21B17/042;E21B19/16;F16L53/00;(IPC1-7):F16L53/00 |
主分类号 |
F16L15/04 |
| 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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