The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2014
Filed:
Dec. 18, 2008
Matthe Contant, Sandvika, NO;
Yves G. Mathieu, Les Ulis, FR;
Erwann Lemenager, Paris, FR;
Juergen Zach, Bad Kotzting, DE;
Matthe Contant, Sandvika, NO;
Yves G. Mathieu, Les Ulis, FR;
Erwann Lemenager, Paris, FR;
Juergen Zach, Bad Kotzting, DE;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A downhole electromagnetic telemetry unit for use with a tubing string () includes an insulated electrically conductive member () and a processing unit (). The insulated electrically conductive member () is electrically coupled to the tubing string () at an upper measuring point () and a lower measuring point (). The processing unit () is configured to process a voltage difference measured between the upper measuring point () and the lower measuring point () across the insulated electrically conductive member () and to derive therefrom a signal transmitted from a surface location ().