| 发明名称 |
METHOD AND APPARATUS FOR MULTI-CHANNEL DOWNHOLE ELECTROMAGNETIC TELEMETRY |
| 摘要 |
An electromagnetic (EM) telemetry method comprises encoding downhole data into a single data stream; separating the single data stream into a plurality of separate data streams; converting each separate data stream into a corresponding separate waveform using a selected digital modulation technique wherein at least one of the frequency and phase of each waveform is assigned a unique value or unique non-overlapping range of values; combining each separate waveform into a combined waveform; and transmitting from a downhole location, an electromagnetic (EM) telemetry carrier wave comprising the combined waveform. |
| 申请公布号 |
US2015315905(A1) |
申请公布日期 |
2015.11.05 |
| 申请号 |
US201314648822 |
申请日期 |
2013.12.06 |
| 申请人 |
EVOLUTION ENGINEERING INC. |
发明人 |
Xu Mingdong;Liu Jili;Switzer David A.;Logan Aaron W. |
| 分类号 |
E21B47/12 |
主分类号 |
E21B47/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A electromagnetic (EM) telemetry method comprising
(a) encoding downhole data into a single data stream; (b) separating the single data stream into a plurality of separate data streams; (c) converting each separate data stream into a corresponding separate waveform using a selected digital modulation technique wherein at least one of the frequency and phase of each waveform is assigned a unique value or unique non-overlapping range of values; (d) combining each separate waveform into a combined waveform; and (e) transmitting from a downhole location, an electromagnetic (EM) telemetry carrier wave comprising the combined waveform. |
| 地址 |
Calgary CA |
