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:
Jul. 13, 1999
Filed:
Mar. 17, 1997
Applicant:
Inventors:
Shu-Kong Chang, Sugar Land, TX (US);
Krishnamurthy Ganesan, Sugar Land, TX (US);
Martin Erich Poitzsch, Sugar Land, TX (US);
Robert Kleinberg, Ridgefield, CT (US);
Abdurrahman Sezginer, Houston, TX (US);
Assignee:
Schlumberger Technology Corporation, Ridgefield, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
324303 ;
Abstract
A logging-while-drilling tool contains a pulsed nuclear magnetic resonance (NMR) device for evaluating earth formations. An antenna of the pulsed NMR device is electromagnetically coupled with a drill collar of the tool for evaluating earth formations. In this way, the antenna generates a magnetic dipole parallel to a surface of the drill collar and the drill collar enhances the electromagnetic field generated by the antenna.