发明名称 |
Wellsite system and method for multiple carrier frequency, half duplex cable telemetry |
摘要 |
Methods and systems for multiple carrier frequency, half duplex cable telemetry for a wellsite. The methods involve generating a first type of bi-directional message in a first propagation mode, generating a second type of bi-directional message in the first propagation mode and in a second propagation mode, transmitting over a cable operatively coupling a surface modem and a downhole modem the first and second types of bi-directional message sequentially in a plurality of time periods across a single frequency bandwidth, and separating each of the first and second types of bi-directional message from a most subsequently transmitted one of the first and second types of bi-directional message by a quiet time sample during which no message is transmitted. |
申请公布号 |
EP2741427(A3) |
申请公布日期 |
2016.12.21 |
申请号 |
EP20130195181 |
申请日期 |
2013.11.29 |
申请人 |
SCHLUMBERGER TECHNOLOGY B.V.;Schlumberger Holdings Limited;Services Petroliers Schlumberger SA |
发明人 |
Olson, Alex;Weerasinghe, Nalin;Wang, Kun;Milosevic, Milos |
分类号 |
H04B3/23;E21B47/10;G01V3/18;G01V11/00;H04B3/32 |
主分类号 |
H04B3/23 |
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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