Methods and apparatus for generating electromagnetic telemetry signals |
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| 申请号 | US15586161 | 申请日 | 2017-05-03 | 公开(公告)号 | US09988855B2 | 公开(公告)日 | 2018-06-05 |
| 申请人 | EVOLUTION ENGINEERING INC.; | 发明人 | Aaron W. Logan; Daniel W. Ahmoye; David A. Switzer; Justin C. Logan; Patrick R. Derkacz; Mojtaba Kazemi Miraki; | ||||
| 摘要 | An electromagnetic telemetry signal generating assembly comprises a first section of drill string, a second section of drill string, a gap sub configured to insulate the first section from the second section, and a power source configured to provide a first voltage to a control circuit. The control circuit is configured to drive a second voltage between the sections of drill string. The gap sub provides a gap of at least 12 inches (30 cm). The second voltage may be different than the first voltage. | ||||||
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| 说明书全文 | |||||||
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