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:
May. 04, 2004
Filed:
Jan. 31, 2001
Laboratoire Central des Ponts et Chaussees, Paris, FR;
Abstract
The invention relates to apparatus with capacitive electrodes for electrical prospecting in a borehole, the apparatus comprising at least two injection electrodes ( ), at least two measurement electrodes ( ), and a current generator ( ) for applying an electrical current between the two injection electrodes. The current generator ( ) delivers alternating current at a frequency of 5 kHz to 100 kHz and at a voltage of less than 1000 volts. At least one of the measurement or injection electrodes ( ) is placed in a borehole ( ) and presents an outer surface that is cylindrical and electrically conductive. The apparatus further comprises means ( ) for measuring the current flowing through said injection electrodes, means ( ) for measuring the potential difference between the measurement electrodes, and means for processing the measured current and potential difference to deduce therefrom the characteristics of the subsoil in which the borehole is situated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile