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:
Jun. 12, 2001
Filed:
Nov. 05, 1998
Applicant:
Inventors:
Martin E. Poitzsch, Sugar Land, TX (US);
Steven F. Crary, Sugar Land, TX (US);
Krishnamurthy Ganesan, Sugar Land, TX (US);
Ralf Heidler, Stafford, TX (US);
Bruno Luong, Stafford, TX (US);
Peter Speier, Stafford, TX (US);
Assignee:
Schlumberger Technology Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/00 ;
U.S. Cl.
CPC ...
G01V 3/00 ;
Abstract
The present invention is directed to a nuclear magnetic resonance logging-while-drilling tool. The tool comprises a drill bit, drill string, a plurality of RF antennas, and at least one gradient coil. The tool further comprises a plurality of magnets that are polarized in a direction parallel to the longitudinal axis of the tool but opposite to each other. The configuration of magnets and antennas provides for at least two NMR regions of investigation.