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:
Sep. 30, 2003
Filed:
Sep. 28, 1999
Louis Soulier, Sannois, FR;
Geoservices S.A., Le Blanc-Mesnil, FR;
Abstract
A method and a system for the transmission of information from a well ( ) drilled through geological formation layers ( ) at least partly cased by metal tubes ( ). The method includes the placing in said well of an information transceiver (E) operating by electromagnetic waves created by the injection of an electric signal by a dipole (P -P ) conductively connected to the metal tubes used for guiding the transmitted waves. In the method, identification takes place of the attenuation of the transmission by certain formation layers ( , ) having a low resistivity and then there is an at least partial electrical insulation of the metal tubes located opposite the low resistivity layers.