Invention Grant
US08773278B2 Apparatus for receiving and transmitting signals in electromagnetic telemetry system used in a wellbore
有权
用于在井筒中使用的电磁遥测系统中接收和发送信号的装置
- Patent Title: Apparatus for receiving and transmitting signals in electromagnetic telemetry system used in a wellbore
- Patent Title (中): 用于在井筒中使用的电磁遥测系统中接收和发送信号的装置
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Application No.: US12809622Application Date: 2008-12-18
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Publication No.: US08773278B2Publication Date: 2014-07-08
- Inventor: Matthe Contant , Yves G. Mathieu , Erwann Lemenager , Juergen Zach
- Applicant: Matthe Contant , Yves G. Mathieu , Erwann Lemenager , Juergen Zach
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent Cameron R. Sneddon
- International Application: PCT/EP2008/010827 WO 20081218
- International Announcement: WO2009/080284 WO 20090702
- Main IPC: G01V3/00
- IPC: G01V3/00

Abstract:
A downhole electromagnetic telemetry unit for use with a tubing string (5) includes an insulated electrically conductive member (31) and a processing unit (15). The insulated electrically conductive member (31) is electrically coupled to the tubing string (5) at an upper measuring point (23) and a lower measuring point (25). The processing unit (15) is configured to process a voltage difference measured between the upper measuring point (23) and the lower measuring point (25) across the insulated electrically conductive member (31) and to derive therefrom a signal transmitted from a surface location (13).
Public/Granted literature
- US20110032117A1 APPARATUS FOR RECEIVING AND TRANSMITTING SIGNALS IN ELECTROMAGNETIC TELEMETRY SYSTEM USED IN A WELLBORE Public/Granted day:2011-02-10
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