Method of handling oil well pipe coupling that contain induction heating and its device |
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| 申请号 | JP12347278 | 申请日 | 1978-10-06 | 公开(公告)号 | JPS5493219A | 公开(公告)日 | 1979-07-24 |
| 申请人 | Hydril Co; | 发明人 | JIYOOJI II RUISU; CHIYAARUZU EI BORUFURASU; | ||||
| 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: | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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