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. 04, 2007
Filed:
Jul. 07, 2004
Philip Cheung, Clamart Cedex, FR;
Andrew Hayman, Clamart Cedex, FR;
Dennis Pittman, Clamart Cedex, FR;
Richard Bloemenkamp, Clamart Cedex, FR;
Philip Cheung, Clamart Cedex, FR;
Andrew Hayman, Clamart Cedex, FR;
Dennis Pittman, Clamart Cedex, FR;
Richard Bloemenkamp, Clamart Cedex, FR;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The invention concerns an apparatus for investigating the wall of a borehole tilled with non-conductive mud, said apparatus comprising: a pad having an inside face and an outside face for pressing against the wall of the borehole; a set of measurement electrodes mounted on the outside face of the pad, potentials differences being measured between said measurement electrodes in order to provide measured points representative of the resistivity of the formation; both a source electrode and a return electrode adapted to inject current into the formation, the set of measurement electrodes being situated between the source electrode and the return electrode.