Transmitting data across electrically insulating gaps in a drill string专利检索- .带导电或绝缘装置的专利检索查询-专利查询网

Transmitting data across electrically insulating gaps in a drill string
申请号	US14916678	申请日	2013-09-05	公开(公告)号	US09920622B2	公开(公告)日	2018-03-20
申请人	EVOLUTION ENGINEERING INC.;			发明人	David A. Switzer; Aaron W. Logan; Jili (Jerry) Liu; Mojtaba Kazemi Miraki;
摘要	A range of apparatus and methods for providing local and long range data telemetry within a wellbore is described. These apparatus and methods may be combined in a wide variety of ways. In some embodiments data is transmitted across a gap in a drill string using signals of a higher frequency for which an electrical impedance of the gap or of a filter connected across the gap is low. Low-frequency EM telemetry signals may be applied across the gap. The gap and any filter connected across the gap present a high impedance to the low-frequency EM telemetry signals. The described technology may be applied for transferring sensor readings between downhole electrical packages. In some embodiments sensors are electrically connected across electrically insulating gaps in the drill string.
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