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. 07, 1992
Filed:
Sep. 11, 1990
Applicant:
Inventor:
Robert Desbrandes, Baton Rouge, LA (US);
Assignee:
Louisiana State University and Agricultural and Mechanical College, Baton Rouge, LA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; G01V / ;
U.S. Cl.
CPC ...
324351 ; 346 / ; 364422 ;
Abstract
An apparatus and method for obtaining a spontaneous potential curve, which pparatus is comprised of: (a) an elongated body: (b) a series of vertically spaced electrodes for measuring electrical potential, wherein one of the electrodes is a reference electrode; and (c) a means for recording or transmitting the various electrical potentials to the surface. Preferably the apparatus is part of drillstring for taking measurements while drilling.