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:
Mar. 23, 1993
Filed:
Nov. 01, 1991
David M Schneider, Cheshire, CT (US);
Baker Hughes Corporation, Houston, TX (US);
Abstract
A method and apparatus for nuclear logging, and in particular, neutron porosity logging is presented. In accordance with the present invention, a pair of spaced lithium detectors, preferably Li.sup.6 I crystal or Li.sup.6 doped glass are used to detect neutrons emitted from a borehole formation being logged. In addition, novel data processing is used to determine the neutron count from the spectrum developed by the lithium detectors. This novel data processing comprises fitting a Gaussian curve to the neutron peak of the spectrum. The Gaussian curve does not include the hydrogen absorption peak of the spectrum. The area under this Gaussian curve represents the neutron count. Accordingly, a more accurate neutron count is obtained which does not include gamma rays attributed to hydrogen absorption.