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:
Apr. 29, 2014
Filed:
Jan. 21, 2008
Matthe Contant, Le Plessis Robinson, FR;
Erwann Lemenager, Paris, FR;
Yves Mathieu, Les Ulis, FR;
Sylvain Chambon, Issy les Moulineaux, FR;
Matthe Contant, Le Plessis Robinson, FR;
Erwann Lemenager, Paris, FR;
Yves Mathieu, Les Ulis, FR;
Sylvain Chambon, Issy les Moulineaux, FR;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
An EM antenna for location on a pipe () surrounded by a casing (). The antenna has a power source () for injecting a current across a first insulated section () of the pipe () and an electrode () for conducting the current from the pipe () to the casing (). There is also a second insulated section () of the pipe arranged to operate together with the electrode () and first insulated section () for directing a path flow of the current. Such antennas are described both in relation to repeater arrangements as well as land and sea applications.